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RIVA Racing Yamaha FX-SHO Stage 1 Kit
RIVA Power Filter Kit RIVA Intake Manifold Upgrade Kit RIVA Free Flow Exhaust Kit RIVA Pump Seal Kit
RIVA Top-Loader Intake Grate RIVA/Solas 'R'-Series Concord Impeller RIVA Performance Ride Plate  
Performance Data Bookmark and Share
Stock 67 MPH @ 7,500 RPM
Stage 1 70~71 MPH @ 7,600 RPM
Stage 2 Engine Kit 260 HP @ 7,600 RPM
 
Note: All testing performed with 1/3 tank of fuel; trim neutral.  
Stage 1 Performance Parts
Part Description QTY Part # Info
Performance Power Filter Kit 1 RY13040 More Product Info
Intake Manifold Upgrade Kit 1 RY12040-IMUK More Product Info
Free Flow Exhaust Kit 1 RY16040 More Product Info
Pump Seal Kit 1 RY25040 More Product Info
Top-Loader Intake Grate 1 RY22040 More Product Info
R-Series DynaFly Impeller 1 YS-DF-13/22R More Product Info
Performance Ride Plate 1 RY21040 More Product Info
Parts Price Total $ 1,344.65  
Special "Kit" Price $ 1,272.00 Add to Cart
 
Stage 1 Performance Overview
This modification delivers the maximum level of performance (+3~4mph) through easily installed air intake, exhaust, and pump enhancements. No internal engine modifications are required.
RIVA Performance Power Filter is installed. Kit replaces restrictive factory intake system delivering improved throttle response and top-speed.
RIVA Intake Manifold Upgrade Kit is installed. Precision tapered billet sleeve directly replaces restrictive mesh element in intake manifold enabling engine to produce more horsepower through increased air flow and boost pressure (+1lb).
RIVA Free Flow Exhaust Kit is installed. Kit replaces restrictive sound suppression system located between water box and hull exit reducing backpressure and engine operating temperatures.
RIVA Pump Seal Kit is installed. Location specific molded inserts are siliconed in to the voids of the OE transom plate and RIVA Top-Loader Intake Grate significantly reducing cavitation.
RIVA/Solas 'R'-Series DynaFly Impeller is a special performance impeller offered exclusively by RIVA and RIVA authorized dealers. Built by Solas, this impeller delivers the ultimate in performance for the FX-SHO. Inner hub is machined allowing impeller to mount closer to vein housing for reduced cavitation and more top speed. Impeller blades are digitally calibrated to RIVA's uniform pitch specifications. Impellers are then dynamically spin-balanced at high RPM. A precision factory blueprinting process is performed far exceeding any "prop shop" services available. Includes Billet Impeller Cone for maximum performance and durability.
RIVA Top-Loader Intake Grate & Performance Ride Plate are installed. Our ride plate and intake grate combo increase top speed and significantly enhance handling characteristics. Prop spin and cavitation found with the stock grate is greatly reduced along with the modified FX-SHO's tendency to drop on its nose when the throttle is let off at high speeds.
NOTE: RIVA Performance Kits intended for competition use only.
 
Additional Performance Ugrades
Part Description QTY Part # Info
Athena Pro-Series ECU
  NOTE: Requires use of RIVA Engine Cooling Upgrade Kit		 1 RY11841-ECU-DC More Product Info
'GEN-3' Super-duty Supercharger Shaft Kit 1 RY17040-UK-6S5-3 More Product Info
Supercharger Gear Dampener 1 RY17040-SGD-6S5 More Product Info
Performance Blow-off Valve Kit 1 RY17040-BV More Product Info
OEM Intercooler Upgrade Kit 1 RY17040-ICUK More Product Info
Engine Breather Upgrade Kit 1 RY19040-EBUK More Product Info
Engine Cooling Upgrade Kit 1 RY10040-ECUK-I More Product Info
Rear Exhaust Kit 1 RY15040 More Product Info
Pro-Series Reduction Nozzle 1 RY23040-N More Product Info
Mirror Block-off Kit 1 RY5-FXSHO-MB More Product Info
RIVA / Jettrim Custom Seat Cover 1 RY5-SHO-COLOR More Product Info
 
Engine Internals Upgrade Kit
Part Description QTY Part # Info
RIVA SHO Engine Internals Upgrade Kit 1 RY10040-EIUK More Product Info
Our Engine Internals Upgrade Kit delivers bulletproof reliability to the Yamaha 1.8L SHO engine in racing and high boost applications. When you're pushing it to the limit and looking for maximum dependability, more...