Stock SuperJet Avg. Speed 43 mph @ 6300 RPM

Description of Parts RPM Top Speed
R&D SuperJet Extended Ride Plate Kit
Part #: 122-70102
6300 43.5-44 mph
R&D SuperJet Aquavein Grate Kit
Part #: 112-70102
6300 43.5-44 mph
R&D/Solas 13/17 Concord Impeller
Part #: 132-013/17
6450-6500 45 mph
R&D SuperJet 701 Recreational 35cc Head
Part #: 412-70035
6550-6650 45.5-46 mph
R&D SuperJet 701 Power Plenum Filter Kit
Part #: 202-00138
6700-6770 46.5-47 mph
R&D SuperJet 701 Reed Stuffer Kit Option
Part #: 272-70301
6770-6800 47 mph

Parts/Kit Overview

The Yamaha Superjet Stage 1 Performance Kit was developed and tested to significantly improve handling and overall engine performance. The 2.5 inch extended R&D Ride Plate will dramatically reduce porpoising over the short O.E.M. plate! The Aquavein Scoop Grate reduces cavitation and loads the impeller more efficiently as well as improves cornering and stability. Acceleration and top speed are noticeably improved using the R&D Performance 35 cc Head Kit. The R&D S/J Engine Control Unit is a must have performance part for any level of performance modifications! The R&D E.C.U. will unleash hidden low end and mid range power, and stays off the rev limiter with the adjustable RPM control, which will add top end performance in rough water conditions. The R&D Superjet Front Sponson kit is without a doubt one of the best handling performance accessories available, period! The sponson kit mounts to the front of each side of the craft and will widen the hull 7/8 of an inch per side with a smooth transition to the bond flange. With the R&D Stage 1 Kit you are sure to have a Superjet that is a lot more fun to ride, and will be very easy to maintain! NOTE: When using the power plenum air filter and reed stuffer options, re-jetting the carburetors will be necessary! R&D Performance offers the proper jetting specifications in the Power Plenums installation instructions.

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