R&D Performance Products is proud to introduce the new line of Kawasaki performance products, a result of painstaking work at R&D’s Research and Development Center and of R&D’s extensive experience in precision engineering and technical know-how. All of this to provide you the highest performing reasonably priced products available, along with R&D’s unsurpassed performance 30 day return policy to insure piece of mind that when you purchase an R&D product it performs the way we say it will, or your money back. At R&D we lead the way in performance and confidence.
 
Ultra 250 9.5-1 Compression Ratio Piston Kit

The R&D High Compression Piston Kit is designed to boost overall compression for increased horsepower throughout the entire RPM range. Designed for closed course racing and race gas.

Pt. # 431-25095

 
Ultra 250 High Performance Ride Plate - Now Available

The R&D Kawasaki Ultra 250X Ride Plate has been fashioned after our dominant and championship winning GP-1200R and Kawasaki 15-F ride plate designs with a few new tricks added. The Ultra 250 ride plate is extended 30mm and re-angled over stock to reduce porpoising while the new R&D stepper concept will add top speed. R&D’s Ride Plate concepts are the only aftermarket designs to dominate in Offshore, National, and World Championships, and to be used and endorsed by Factory Yamaha and Kawasaki racing teams for nearly a decade! The new Ultra 250X ride plate from R&D is “The Perfect Ride plate” with a great balance of speed and handling with no compromises!
  • 2-3 MPH top speed improvement
  • Race proven designs for over a decade
  • Unique industry first multi-step concept
  • Improved straight line stability
  • Significantly improved cornering
  • Reduced chine walking on high speed sweepers
  • Drives through chop with superior stability
  • Retains reverse gate mounting and operation

Pt. # 121-25000
Ultra 250 Performer Engine Kit - Now Available

The R&D Performer Engine Kit Option will add a great boost in overall power. Increased low end and mid range response and acceleration, as well as a solid 2 MPH gain in top speed performance. The R&D Performer Engine Kit consists of an R&D 1 TO 1 Supercharger Booster Wheel, R&D Powershot Fuel Control Unit, and an R&D High Performance Fuel Pump Kit and Installation Tool. The R&D Performer Engine Kit will deliver more horsepower reliably with the properly matched fuel control component parts only available through R&D. The R&D Performer Engine Kit will perform excellent in all recreational riding conditions using 91 octane pump gasoline. R&D also offers specialty tools, AFR gauges, boost gauges and fuel pressure gauges. Tools and gauges sold separately.

STOCK ULTRA 250X AVG. SPEED
65.5-66 mph @ 7600-7700 RPM

PERFORMER KIT
72-72.5 mph @ 8050-8100 RPM


Pt. # 611-24349


 
Ultra 250X Supercharger Stage 1 Engine Kit - Now Available

The R&D Stage 1 Engine Kit will massively increase low end, mid range response and acceleration with a top speed performance of 73 mph (combined with a R&D Performer kit). The R&D Stage 1 Engine Kit consists of a R&D 1 TO 1 Supercharger Booster Wheel, R&D Tensioner Wheel, R&D Powershot Fuel Control Unit, R&D 625cc High Flow Fuel Injector Kit, R&D Fuel Pressure Regulator w/Mounting Bracket, R&D Fuel Pressure Gauge Adaptor, #4 AN style Fuel Rail Fitting, #4 AN Return Line Fitting, and preassembled SAE Coast Guard Approved Fuel Lines with #4 AN fittings. The R&D Stage 1 Engine Kit will deliver more horsepower reliably with the properly matched fuel control component parts only available through R&D. The R&D Stage 1 Engine Kit will perform excellent in all recreational riding conditions using 91 octane pump gasoline. R&D also offers specialty tools, AFR gauges, boost gauges and fuel pressure gauges. Tools and gauges sold separately.

STOCK ULTRA 250X AVG. SPEED
65.5-66 mph @ 7600-7700 RPM

STAGE 1 PERFORMANCE KIT
73 mph @ 8100-8150 RPM


Pt. # 611-24350
Ultra 250X Supercharger Gear Oil - Now Available

R&D's new Supercharger Gear Oil is specifically formulated to perform in ultra high temperatures and provide maximum gear lubrication with minumum drag. Sold by the quart.


Pt. # 611-27000 $25/Quart
Ultra 250 Intercooler Temperature Control Upgrade Kit - Now Available

The R&D Ultra 250 Intercooler Temperature Control system was developed to offer an inexpensive complete bolt on kit that will allow the full performance and cooling potential the O.E.M. intercooler has to offer for recreational applications. Intercooler core water temperatures have a range of affect on the supercharged air temperatures that enter into the engine. The Kawasaki Ultra 250 Intercooler operates on a dual line entrance mixture of lake temperature water and hot (140 degree) engine water that enters from the exhaust manifold to the top of the intercooler. R&D has found that bypassing the hot engine cooling water directly outward, and adding an additional intercooler cooling line, there can be a substantial and noticeable increase in low end and midrange power along with reduced detonation. The R&D Intercooler Temperature Control Kit also includes an industry first intercooler pressure relief blowoff valve to keep internal water pressures down to safe O.E.M. pressure ranges. R&D offers a range of machined flow control fittings to allow water volume control tuning for intercooler temperature adjustments for warm lake water and extreme hot air conditions. R&D offers an additional pressure relief blowoff valve kit for high water volume flow rates on higher boost Performer and Stage 1 engine kits. The R&D Kit will allow temperature tuning that will deliver surprising results. Why upgrade to aftermarket intercooler kits when there is more performance and power potential hidden in the stock intercooler system?

  • More horsepower with cooler intake air temperatures
  • Increased acceleration and mid range performance
  • Reduces detonation in hot weather conditions
  • Temperature control tuneability
  • An inexpensive recreational performance addition
  • Pressure relief valve preserves O.E.M. intercooler
  • Easy installation instructions

Pt. # 660-82500


Optional Flow Control Fittings:
Pt. # 660-82520 R&D Flow Control Fitting .200"
Pt. # 660-82525 R&D Flow Control Fitting .250"
Pt. # 660-82528 R&D Flow Control Fitting .280"
Pt. # 660-82532 R&D Flow Control Fitting .320"
Pt. # 660-82510 R&D Dual Pressure Relief Valve Kit

Ultra 250 Temp Sensor Interfacer - Now Available

R&D Performance offers a unique supercharger air temp sensor interfacer which will be necessary on Ultra 250X units with the Stage 3 Engine Kit. The added boost pressure of the R&D 1.05 to 1 and 1.1 to 1 pulley will bring along elevated intake temperatures which can be defused or lowered back down to safe temperatures with the R&D Intercooler Upgrade Kit. However, the air temp sensor is located between the supercharger and the intercooler therefore transmitting a temperature rating that is higher than what is actually entering the engine. The R&D sensor interfacer will keep the engine out of “limp home mode” during a race moto. There have been some Ultra 250X models that will default into “limp home mode” if the charger temperature sensor is peaked prematurely. Any Ultra 250 which has this default occur on long rides on hot (115 degree) days should install the R&D Supercharger Temp Interfacer Kit. The Interfacer is an inexpensive fix for this randomly occurring problem.

Pt. # 801-25008


 
Ultra 250 Cylinder Leakdown Test Kit - Now Available

The R&D Cylinder Leakdown Test Kit for four stroke engines is the fastest and most accurate method to test and verify the condition and performance values of a four stroke engines cylinder, pistons, intake, and exhaust valves. Simply find top dead center on the compression stroke of the cylinder and insert the cylinder test kit and inject air into the cylinder. The percentage of leakdown will instantly be displayed on the gauges. Accurately test for cracked or detonated pistons, leaking ring sets, and leaking intake or exhaust valves. The R&D Leakdown Kit is more accurate than Snap-On, Matco, or Mac Test Kits as the R&D second gauge reads in P.S.I. and not a large window range displaying only good, fair, or poor rating. The R&D Kit comes with comprehensive directions that has a calibration chart enclosed that will display leakdown percentage at 100, 90, and 75 P.S.I. ratings. The R&D Leakdown Test Kit is accurate, fast, and efficient. Kits are available in 10 mm and 14 mm threads, and optional adaptors are available.

Pt. # 611-26007 Leakdown Test Kit with 10 mm Thread
Pt. # 611-26008 Leakdown Test Kit with 14 mm Thread
Pt. # 611-26009 Leakdown Test Adaptor only 10 mm Thread
Pt. # 611-26010 Leakdown Test Adaptor only 14 mm Thread


 
Universal High Performance, High Volume Fuel Pump Kits - Now Available

R&D Performance carries a complete line up of high performance replacement fuel pumps offered in a variety of flow ratings to facilitate from basic low cost replacement to an all out 500 H.P. race machine. All R&D fuel pumps have been precision flow rate tested and charted in (LPH) liters per hour. R&D fuel pumps arrive complete with terminal connectors for both the new high performance pumps quick connect installation, as well as extra terminal connector parts for the O.E.M. pump for use when converting back to stock. The R&D quick connect terminals help make fuel pump testing easy when switching from a low pressure to a high pressure fuel pump.

NOTE: R&D High Performance fuel pumps are .040 larger than O.E.M. Mitsubishi fuel pumps on Yamahas and Kawasaki's, therefore it may be necessary to use the R&D Fuel Pump swedge tool to enlarge the fuel pump housing for easy installation.

Pt. # 811-25190 R&D 190 LPH Low Pressure Fuel Pump Kit
Pt. # 811-25255 R&D 255 LPH Low Pressure Fuel Pump Kit
Pt. # 811-25256 R&D 255 LPH High Pressure Fuel Pump Kit
Pt. # 811-25257 R&D Fuel Pump Swedge Tool


 
Ultra 250 Anti-Cavitation Cone - Now Available

The R&D Kawasaki Ultra 250X/LX Anti-Cavitation Pump Cone Kit will reduce overall internal pump cavitation within the Kawasaki Ultra 250’s offset reduction/compression nozzle design. The O.E.M. Ultra 250 reduction/compression nozzle is offset 5 degrees, while the O.E.M. pump cone/bearing cap remains straight which causes uneven pressures within the pump and reduction nozzle. The R&D Anti-Cavitation Pump Cone is offset 5 degrees and reshaped to match the O.E.M. reduction nozzle offset promoting even pressures, which will substantially reduce cavitation, increase pump hook up, boost acceleration, and increase top speed performance.

Pt. # 161-25010
Ultra 250 Blowoff Valve Pressure Adjustment Kit - Now Available

The R&D Kawasaki Ultra 250X Blowoff Valve Pressure Adjustor Kit is just what the doctor ordered for keeping the Ultra 250X’s boost pressure properly adjusted for peak performance. The O.E.M. Kawasaki blowoff valves pressure has an O.E.M. specification setting of 10 P.S.I. After the recommended break-in period has been performed or after 10-20 hours, if poor performance and low peak RPM’s are noticed, use the R&D Blowoff Valve Pressure Adjustor Kit to check and properly adjust the valves blowoff pressure. Some O.E.M. valve settings blowoff prematurely, leaking off and robbing valuable horsepower with low 6-8 P.S.I. settings. The R&D Kit is a necessary tool kit to readjust the blowoff valves pressure settings when using R&D Booster Wheel Pulley Kits. The R&D Blowoff Valve Pressure Adjustor Kit has helped many top dealers service departments reset the O.E.M. valve system to O.E.M. valve specifications to keep the Ultra 250X performing properly.
  • Keeps engines performing at peak RPM’s and power
  • Keeps O.E.M. boost in proper check
  • Easy to use pressure pump and gauge
  • Quick and easy to adjust

Pt. # 611-26005
Ultra 250 Crankcase Ventilation/oil and Vapor Separator Kit - Now Available

The R&D Ultra 250 Crankcase ventilation system was developed to offer a complete bolt on breather expansion kit which will substantially reduce crankcase pressures on Kawasaki Ultra 250’s supercharged engines. High performance engines (especially supercharged) need as much crankcase ventilation as possible. The R&D system doubles the volume of the O.E.M. crankcase breather and triple baffles the oil and vapor pressures within the O.E.M. breather case. The R&D system relieves excess crankcase pressures in the oil breather case and vents high pressures and fuel vapors into a piggyback vapor/oil catch can reservoir. The R&D vapor/oil reservoir mounts and connects directly to the O.E.M. oil separator tank with a quick and easy bolt on installation. The R&D crankcase ventilation and vapor separator system puts an end to oil blow by messes in the engine compartment by relieving excess crankcase pressures and trapping excess fuel vapors, condensation and blow by oil into the R&D oil/vapor separator.

For pricing see Catalog Section / Crankcase Ventilation
  • Increases engine RPMs and performance by relieving excess crankcase pressures.
  • Decreases oil blow by caused by excessive crankcase pressure in high performance engines.
  • Traps fuel vapors, excess crankcase fuel blow by and condensation in the vapor reservoir and keeps them from entering the intercooler.
  • Helps to maintain a cleaner more efficient intercooler.
  • Helps to reduce and remove excessive fuel vapors and water condensation from the oil system which adds to oil life.
  • A great addition to any high performance long course or endurance competition race machine.
Ultra 250 Aquavein Scoop Grate - Now Available

The new R&D Kawasaki Ultra 250 Aquavein Intake Grate Kit has been designed and developed with all new performance concepts in mind to deliver the ultimate handling and speed performance in recreational, offshore, and closed course race conditions. The new R&D Ultra 250 Aquavein has been extensively offshore, race track, and 1 and 2 up recreational tested to guarantee reduced cavitation and maximum pump hook up in any condition. The R&D Ultra 250 Aquavein will deliver quicker acceleration, higher top speed performance and a much smoother and more predictable ride over the O.E.M. intake grate in rough water conditions. Low speed and high-speed turns are a breeze with new found control. The secret to the R&D Aquavein’s performance is in its patented, award winning, and championship winning wing and twin bar, deep channel design. The well proven R&D top loader Aquavein wing concept has been used exclusively by Factory Kawasaki and Yamaha racing teams to win every Pro 1200 and Open World Championship for a full decade! Bolt on an R&D Aquavein top loader intake grate and experience why R&D is the top selling intake system worldwide.

Pt. # 111-25000
Ultra 250 Sponson Kit - Now Available

The new R&D Kawasaki Ultra 250 Pro Series Sponson Kit was designed and developed with all new generation performance concepts in mind to deliver a whole new level of handling and speed performance with offshore and closed course race proven adjustability options. The R&D Pro Series Sponson Kits have been extensively offshore, race track, and 1 and 2 up recreational tested to guarantee a comfortable setting for any riding style or condition! The R&D Ultra 250 Sponson Kit will deliver higher top speed performance and a much smoother and more predictable ride over O.E.M. sponsons. Low speed and high-speed turns are a breeze with new found control. The secret to R&D’s new generation concept is in the backing plate design with an aftermarket first, low pressure, low friction concept that breaks up and relieves speed robbing drag within the sponson’s backing plate channel. The new R&D design staggers the sponson blades fins water trapping area to pick up less water in the front and more in the back. The stagger/step-up concept greatly reduces chine walk in high speed corners, while allowing more rear end grip. There is also a higher end recreational/race setting with enough grip for the best of pro’s! Finally there is an aftermarket sponson kit that really does it all! More top speed due to less drag, less chine walking, racer preferred rear end grip, and unmatched straight line stability.

Pt. # 121-25001
Ultra 250 1 Degree Nozzle Wedge Kit - Now Available

The R&D 1 Degree Reduction Nozzle Wedge Kit for the new KAWASAKI ULTRA 250 will add quicker acceleration and top speed performance as well as allow the ULTRA 250s’ bow to ride slightly higher which will significantly reduce annoying bow spray promoting a much dryer ride. Extensive testing has led our development team to wedge the reduction nozzle up 1 full degree which will inexpensively give the ULTRA 250 better handling everywhere and provide a boost of up to 1 mph in top speed performance. In fact, a much smoother and more predictable ride will be noticed, along with the reduction of annoying bow spray! The billet aluminum CNC machined 1 degree reduction nozzle wedge kit was specifically designed to work without compromising or removing the O.E.M. reverse gate. The R&D Pump Wedge Kit comes complete with all the necessary hardware and instructions for easy installation. A smoother, more enjoyable, dryer, faster ride! Only from R&D!

Pt. # 141-25001
Ultra 250 Driveshaft Shim Kit - Now Available

The R&D driveshaft shims install into the prop snout and remove the unwanted play or float the driveshaft has in the prop/pump assembly. Properly shimming the driveshaft will keep the driveshaft couplers fully engaged. Fully engaged couplers eliminates premature rubber dampner wear and failure.

Pt. # 161-00810
Ultra 250 Cool Air Intake Kit - Now Available

The R&D high performance Air Filter Kit will improve acceleration and top speed performance by increasing air flow and reducing air temperatures that enter directly into the Ultra 250’s air plenum box area. The O.E.M. air plenum box on the Ultra 250 is a great design that will flow plenty of air. However, the air that feeds the plenum box is heated by the engine. R&D has created an easy to install “flat filter” that installs directly in place of the large center access inspection cover located directly under the main glove box. The R&D Flat Air Filter insert will allow unrestricted fresh and cool air to enter the air plenum box area which will add power you can feel and a nice high performance tone. The R&D Performance Filter Kit also features two filters, one for each of the surge and blowoff protection valves. The O.E.M. surge valve recycles compressed hot air back into the air box plenum at idle and under deceleration conditions. The R&D surge and blowoff valve filter kit removes the air recycling hoses which will keep the hot air from entering the air plenum box reducing the engines intake air temperatures. The R&D Ultra 250 Air Filter Kit offers great performance tips on how to remove the restrictive air vent hoses which will further reduce the under seat ambient air temperatures. The R&D Filter system does not remove or alter the O.E.M. plenum box in any way, therefore there are no questions to be answered regarding water ingestion! The R&D Filter Kit is easy to install with no modifications required to the O.E.M. parts.

• Improved low end performance
• Great high performance tone
• Cooler engine air temperatures
• Cooler engine compartment temperatures
• Easy to install bolt on performance (no modifications)
• Low cost performance advantages


Pt. # 215-25000
Ultra 250 Surge and Blowoff Valve Air Filter Kit - Now Available

R&D Performance offers a two part High Performance Surge and Blowoff Valve Air Filter Kit which will reduce the engines intake air temperature promoting stronger acceleration and mid range performance as well as better top speed averages. The O.E.M. Surge Protection device recycles wasted off hot air back into the O.E.M. air plenum box whenever there is off and on throttle operations. In aggressive recreational or closed course riding styles, this can promote sluggish acceleration from turn to turn due to the recycled hot air. The R&D Surge Blowoff Filter Kit cycles the hot wasted off air to the back of the hull allowing it to vent out via the rear air vents. The R&D Filter Kit comes complete with 2 port plugs to seal off the blowoff valves return ports on the O.E.M. air plenum box and allowing the recycling hoses to be removed for a great high performance look.

• Lowers intake air temperatures
• Adds to low end response
• Displays a great high performance look
• Adds a great high performance sound
• A must have accessory for offshore and closed course


Pt. # 215-25001
Ultra 250 Exhaust Emission Blockoff Kit - Now Available

The R&D Exhaust Emission Blockoff Kit was developed to block off the O.E.M. exhaust emission ports located in the valve cover that connects to the exhaust ports. The Kawasaki labeled “air suction valve” operates effectively under low speed and cruise RPM ranges allowing air to be pulled from the main air box plenum and into the exhaust ports, which will result in a lower measured emission ratio (cleaner). The air suction valves fiber reed pedals can become heat damaged over time which can cause the valves to leak or back flow hot exhaust gases back out of the valve at sustained W.O.T. (wide open throttle) operations. Leaking air suction valves can result in a melted PVC connector T and poor top speed performance. The R&D Air Suction Blockoff Plate Kit will reduce exhaust gas temperatures, lower exhaust back pressures, improve low and top speed performance, and deliver a more accurate and precise air to fuel ratio for precision high performance tuning accuracy. The R&D Air Suction Blockoff Plates are a great addition to any recreational application to remove expensive prematurely worn valves that can cause poor performance. The addition of a R&D Blockoff Kit will be strongly suggested on any stage level of performance modifications on the Ultra 250X.

• Inexpensively replaces prematurely worn or leaking valves
• Lowers exhaust temperatures
• Lowers exhaust back pressures
• More responsive low end performance
• More consistent top speed averages
• More precise AFR tuning


Pt. # 331-25000
Ultra 250X Fuel Pump Pressure Regulator Blockoff Fitting - Now Available

R&D offers a Fuel Pump Pressure Regulator Blockoff Fitting Kit which will allow the O.E.M. stock in tank fuel pressure regulator to be removed completely and replaced with a billet part which is necessary when installing an aftermarket externally adjustable fuel pressure regulator. The O.E.M. in tank fuel pressure regulator is fixed to maintain 40-43 pounds of fuel pressure at all times. For high performance applications where horsepower is boosted, it is necessary to install larger flowing fuel injectors and be able to tune the fuel pressure up or down as needed. Most factory race teams are running 65 plus pounds of fuel pressure along with higher flowing fuel injectors and externally adjustable pressure regulators. The R&D Fuel Pressure Blockoff Fitting is the answer to quickly replace and block off the port. The R&D fitting is manufactured to “Deadhead” or block the port solid, however, the fitting is pre-machined and tapped and can be relief drilled to be able to install a Mikuni Super BN Series jet directly into the end of the fitting for a small in tank restrictor jet which may be helpful for fine tuning fuel pressures in high altitude situations where finer tuning of fuel pressure is necessary. R&D has a complete line up of fuel injectors, fuel pressure regulators, fuel gauge, and fuel hose accessories, all that meet I.J.S.B.A. and APBA approval.

Pt. # 811-25100
Ultra 250X High Flow Fuel Injector Kit - Now Available

When boosting the horsepower on a Kawasaki four stroke fuel injected engine, whether using high compression pistons, cams, or higher ratio supercharger compressor wheels, it will be necessary to increase the fuel flow delivery. The O.E.M. Kawasaki injectors have been precision flow rate tested to be 90 to 95 percent peaked on stock units at sea level without modifications. R&D offers high performance fuel injectors with a higher atomization spray pattern that are easily capable of delivering fuel flow specifications to accommodate up to 375-400 horsepower!
R&D has flow rate tested the O.E.M. Ultra 250X injectors and verified them to flow 375cc at 40 PSI of fuel pressure, which rates them to flow 38 pounds of fuel per hour. The R&D High Performance Fuel Injectors have been precision flow rate tested to 625cc at 70 PSI of fuel pressure, which rates them to flow 62 pounds of fuel per hour. R&D High Performance Injectors have been flow rate tested to perform excellent, delivering precise fuel flow at fuel pressure ratings ranging from 40 to 80 PSI. Each R&D high Performance Fuel Injector Kit will come packaged with vital flow test rating information that will be broken down specifically in five pound increments in fuel pressure to give the fuel flow delivery amounts in cubic centimeters and overall pounds of fuel per hour. This fuel pressure/fuel flow table information will help in tuning fuel pressure to match the engines fuel flow needs based on horsepower gains over stock. R&D offers only the highest quality fuel injectors, fuel pressure regulators, and fuel management accessories for all your fuel management needs.

Pt. # 811-25000
Universal Fuel Pressure Regulator - Now Available

Universal bypass fuel pressure regulator for carbureted or EFI fuel systems applications. Base fuel pressure is adjustable from 20 to 60 PSI with high pressure spring (installed). Ideal for carbureted and EFI bypass applications where more flow and superior pressure control are desired. R&D offers two types of fuel pressure regulator set ups. Part # 801-25010 will come completely assembled with #4 fittings ready for R&D custom hoses with #4 AN fittings for a nice high performance hot rod look. Part # 801-25009 will have brass 3/8” to ¼” barb 90 degree fittings installed for use with push on type hose and Otekier style clamps for security. R&D offers high performance Coast Guard approved fuel hose that can be purchased by the foot (PT#611-27502), as well as the Otekier style clamps (Pt#611-27518).
The universal type bypass style regulator is capable of handling any fuel pump up to 250 GPH. Replace “Deadhead” regulator performance and experience the full flow volume and rock steady fuel pressure that only a dynamic R&D fuel pressure regulator kit can produce. Available for Sea-Doo, Yamaha, and Kawasaki watercraft.

R&D offers a mounting bracket (PT#801-25011) that specifically mounts the fuel pressure regulator on top of the inner cooler. This location allows the R&D custom fuel lines to route perfectly.

Pt. # 801-25010 Fuel Pressure Regulator (Fittings not included)
Pt. # 801-25011 Mounting Bracket for Fuel Pressure Regulator
Ultra 250X Fuel Line Kits - Now Available

R&D fuel lines are produced using high performance billet anodized AN fittings coupled to Type A SAE J 1527 US Coast Guard Approved fuel line. All Ultra 250 fuel lines are cut to specific length and pre-assembled to ensure a perfect seal, a custom fit, and that awesome hot rod look.

Pt. # 611-27513 Rail to Regulator
Pt. # 611-27514 Regulator to Tank w/Bulkhead Fitting Kit
Pt. # 611-27515 Regulator to Tank w/ Standard Tank Vent Fitting
Pt. # 611-27516 Regulator to Fuel Gauge
Ultra 250 Fuel Gauge Adaptor for Test, Tune, Set Only - Now Available

R&D Fuel Gauge Adaptor allows you to mount the fuel pressure gauge directly to the fuel pressure regulator.

Pt. # 611-27517
Type A SAE J 1527 US Coast Guard Approved 1/4" Fuel Line - Now Available

Sold per foot.

Pt. # 611-27502
Universal #4 AN Fuel Return Line Fitting Adapter Kit - Now Available

The R&D Universal Fuel Return Line Adaptor Fitting can be installed into the top of any fuel tap assembly by finding a clear area on the top of the fuel tap system large enough to install the fitting. Drill a 15/32 or #56 (.468) drill size hole and install the fitting using the kit supplied aluminum seal washer on each side of the fitting. The R&D universal fuel return fitting kit is the safest and cleanest way to properly install a fuel return to the top of any make or model fuel tap assembly. Kit comes with one #4 AN bulkhead fitting, one #4 AN bulkhead nut, and two #4 An 7/16” Aluminum washers.

Pt. # 611-27501
Ultra 250X Fuel Rail Return Line Adaptor Fitting - Now Available

R&D offers a unique Fuel Rail Return Line Adaptor fitting which will allow quick and easy connections of high performance fuel pressure regulators or fuel pressure gauges. The R&D Fuel Rail Fitting has the O.E.M. tapered metric thread pitch for easy bolt on assembly (no tapping required) installation. The R&D Fitting is available in two types, part number 611-27499 for barb type push on hose connections, and part number 611-27500 for #4 AN type connections. R&D has a complete line up of fuel pressure regulators, fuel gauge, and fuel hose accessories, all that meet I.J.S.B.A. and APBA approval.

Pt. # 611-27499 Barb Type
Pt. # 611-27500 AN Type
Ultra 250X Supercharger Wheel Puller Tool - Now Available

The R&D Ultra 250 Supercharger Wheel Puller Tool was developed to offer a much safer and quicker method to extract or pull the compressor wheel from the bearing carrier hub assembly without causing any damage or breakage to the bearing carrier hub. The R&D wheel puller tool makes it fast and easy to remove a supercharger wheel without the removal of the intercooler system or the water muffler assembly. The R&D supercharger drive wheel puller will save at least an hour on a pulley removal and replacement. A must have tool.

Pt. # 611-26004
Ultra 250X Driver Wheel Holder Tool - Now Available

The R&D Ultra 250 Supercharger Driver Wheel Holding Tool was developed to secure the driver wheel from moving while removing the drive hubs hardware. The R&D Holding Tool makes it fast and easy to remove and re-install a supercharger wheel without damaging or breaking the wheel hub. Use the holding tool to properly torque the drive bolts and main spline drive bolt. A must have tool.

Pt. # 611-26003
Ultra 250X Belt Holder Kit - Now Available



Pt. # 611-25200
Ultra 250X Supercharger Wheel Hub Kit - Now Available

The R&D Ultra 250 Billet Supercharger Wheel Hub Kit was designed and developed while testing the R&D Supercharger 1 to 1 Booster Wheel Kit. The R&D Billet Supercharger Hub Kit will replace the O.E.M.’s vulnerable part with a redesigned and beefed up precision CNC Machined 6061 billet aluminum part that is much stronger than stock. The new R&D design also offers pulley wheel alignment adjustments with a CNC machined Shim Kit that allows for precision serpentine belt cog alignment. The R&D kit comes complete with a special tool that will indicate the perfect alignment of the crank drive and compressor pulleys. At 8,000 RPM, horsepower and belt life can be greatly sacrificed through misaligned pulleys! The R&D Kit offers superior strength, precision pulley alignment, and extended serpentine belt life. This all adds up to a powerful gain.

Pt. # 611-25001
Ultra 250 SuperCharger Pulleys

The new R&D Racing Supercharger Pulley Wheel will deliver a noticeable and impressive boost in torque and overall horsepower. Designed and manufactured from high quality billet aluminum and precision hard anodized for superior belt wear resistance. The R&D Pulley is ¾ lb lighter than the O.E.M. steel pulley, and delivers 2.5 to 3.5 lbs of additional boost pressure along with 30 plus well fed ponies. The holeshot acceleration is a solid 1.5-2 boat lengths over stock with a top speed gain of 1 to 2 mph over stock. Impressive results! The R&D Pulley comes completely assembled with a new high performance bearing, all necessary hardware and installation instructions.

R&D strongly recommends the use of the R&D Powershot Fuel Tuner and R&D High Output Fuel Injectors to increase fuel flow delivery when using the R&D Supercharger Wheel. Not using the recommended R&D Powershot and R&D High Output Fuel Injector Kit with the R&D Supercharger Wheel, can result in engine damage due to a lean air fuel ratio.

Pt. # 611-25010 OEM Replacement Supercharger Pulley Wheel
Pt. # 611-25011 Supercharger Pulley Wheel 1 to 1 (entry level)
Pt. # 611-25105 Supercharger Pulley Wheel 1.05 to 1
Pt. # 611-25110 Supercharger Pulley Wheel 1.1 to 1
Ultra 250X Supercharger Belt Tensioner Wheel - Now Available

R&D has significantly improved the Kawasaki Ultra 250’s serpentine belt tensioning wheel system by redesigning and precision machining a new tensioner wheel with a larger O.D. The new R&D Tensioner Wheel offers a wider adjustment range and helps to reduce belt slippage via more surface area for belt contact. Less belt slippage with less belt tension reduces heat and promotes supercharger bearing life! The R&D Tensioner Wheel also offers a perfect adjustment range when installing an R&D Supercharger Wheel. Better adjustment promotes less belt slippage which will add a boost in power. Wheel comes complete with precision bearing installed.

Pt. # 611-25000
Ultra 250X Bearing Rebuild Kit - Now Available

R&D recommends the inspection of the R&D Supercharger and Tensioner wheel bearings after 15 hours and replacing them after 20 hours.

Pt. # 611-25009
Ultra 250X Fuel Pressure Gauge - Now Available


Pt. # 900-02180
R&D Autometer 0-35 PSI Universal Boost Gauge - Now Available

R&D offers the Autometer Ultra-Lite Series 2” mechanical boost gauge to give the best reference in verifying and monitoring boost levels precisely on any supercharged or boosted engine. Installing a precision boost gauge is the only way to know exactly what boost level the compressor is producing. Check and verify constant boost conditions and verify Sea-Doo clutch conditions and true boost level gains when installing aftermarket compressors, compressor wheels, and overdrive compressor drive wheels. The Autometer Gauge kit comes complete with all the necessary hardware, and 10 feet of nylon tubing to install on any watercraft. It will be necessary to order an R&D Boost Gauge Adaptor Kit for the specific make and model of engine. R&D has boost gauge adaptors for all Sea-Doo 4 TEC supercharged engines and the Kawasaki Ultra 250.

Pt. # 900-04304
Innovate LC-1 Wideband Air/Fuel Ratio Kit

Professionally tune your engine with complete confidence. The LC-1 is more accurate than conventional designs costing many times as much, and its self-calibrating circuitry can compensate for changes in temperature, altitude and sensor condition. The LC-1 is ideal for applications such as Dynos, Data Acquisition, Standalone ECUs, piggyback fuel controllers, OBD-II software or chip programmers, and gauges. This Innovate kit comes complete with the patented award-winning LC-1 Wideband Controller with a sealed cable, DB-Blue digital Gauge, Bosch 5-wire Wideband 02 Sensor, Bung/Plug Kit, Software CD, and quick start guide. Take the guess work out of tuning, recommend by R&D to tune all high performance 4-stroke watercraft.

Pt. # 900-04378
R&D Autometer Dash Bezzle for Fuel Pressure Gauge - Now Available

The R&D Autometer Fuel Pressure Gauge Bezel is necessary for adapting and installing the small Autometer fuel pressure gauge into an instrument panel. The Autometer fuel pressure gauge is originally designed to be a fuel rail gauge. In a tight dash or console area there is not enough room for three 2” gauges. R&D has created a unique and clean method to install a small fuel rail gauge in a dash or console. By using a small fuel pressure gauge and creating a barrel bezel for the perimeter of the gauge, it is possible to have 3 gauges in a small compact area.

Pt. # 900-04379
Ultra 250 Boost Gauge Adapter - Now Available

The R&D Boost Gauge Adapter installs between the supercharger and the waste gate and allows the ability to mount a boost gauge to it via 1/8" fitting. This will enable an accurate measurement of boost the supercharger is delivering. Kit comes with gaskets and hardware.

Pt. # 611-26002
Ultra 250 Waste Gate Block-Off Kit - Now Available

The new R&D Waste Gate Block-Off kit is designed to block-off the inconsistent OEM waste gate. The cnc machined part allows the supercharger to deliver its boost without premature pressure loss from a leaking waste gate. Kit comes complete with gaskets and hardware.

Part # 611-26001
Ultra 250 Pump Shoe Seal Kit - Now Available

The R&D Pump Shoe Seal kit for the Ultra 250 is now available. The three piece Seal Kit stuffs up the unwanted cavities in the pump shoe and the oem intake grate that aid in producing cavitation. This kit allows you to seal up the area between the intake grate and pump shoe, which will reduce cavitation and increase pump efficiency and performance.

Pt. # 161-25000
Ultra 250 Deep Fuel Pickup - Now Available

The R&D Deep Fuel Pickup is designed to maximize fuel volume. The stock fuel pickup is located horizontally in the gas tank three inches above the bottom of the tank. This leaves approximately 5 gallons of unusable fuel in the bottom of the tank. The R&D Deep Fuel Pickup relocates the stock fuel pickup to the bottom of the tank in a vertical position. The new positioning allows for 24 percent more riding time per tank of gas. An absolute must for offshore racing.

Pt. # 801-25100
Ultra 250 PowerShot Adjustable Fuel Tuner - Now Available

R&D Performance Products, U.S.A. announces the release of the new R&D Powershot fuel injection tunning module and fuel controller. The R&D Powershot fuel injection tuner will deliver increased horsepower, acceleration, and stronger mid-range performance by delivering a higher performing air to fuel ratio (A.F.R.) to the engine. Many of today’s high performance fuel injected four stroke muscle craft have a lean A.F.R. R&D Performance has tested, documented, and analyzed the O.E.M. fuel maps on every current fuel injected four stroke watercraft, and pre-programmed and coded the new R&D Powershot fuel injection control module to safely alter the O.E.M. fuel map to a higher performing and safer A.F.R. (richer). More horsepower, greater acceleration and stronger mid-range are the result when the proper A.F.R. is achieved and is tuned for optimum performance.

The R&D Powershot is fully adjustable on the fly (with the engine running, observed and tuned while riding), and will accommodate a wide range of adjustability to properly performance tune the A.F.R. for any combination of aftermarket parts. The R&D Powershot will add horsepower, reliability, and adjustability to any electron