RIVA Performance Cylinder Head Kit is installed. Head features 48cc
domes (including OEM gasket volume) producing 145-150psi
compression. Girdled head design securely clamps cylinder down
preventing potential cylinder cracking possible on modified motors.
(Note: We offer a modification service for your stock cylinder head.
This consists of decking and redesigning the combustion chambers.
This modification will produce performance similar to the RIVA
Performance Head, but does not provide protection from cylinder
cracking.)
RIVA Power Filter Flame Arrestor is installed. Screen-type element
mounts directly onto opening at front of original flame arrestor
case replacing the restrictive baffling system. Provides improved
throttle response and all around performance gains.
RIVA Pro-Series EFI Control Unit is installed. Unit provides easy
adjustment of fuel delivery to meet the needs of modified EFI
motors. Plugs directly into factory wiring harness connectors for
quick installation.
RIVA / Boyesen Reed Stuffers are installed into stock reed cages
with stock reed petals. Stuffers increase fuel / air velocity
through intake tract, resulting in increased throttle response and
acceleration.
RIVA Cat Removal D-Plate is installed in place of restrictive
catalytic converter increasing top-end speed while reducing
under-hood operating temperatures and allowing the use of regular
2-stroke oils. Our D-plate is a high quality stainless steel replica
of the plate that is standard equipment on export model Yamaha
watercraft without emission controls.
RIVA GP1300R Free Flow Exhaust Kit is installed. Kit replaces
restrictive sound suppression system located between waterbox and
hull exit reducing backpressure and engine operating temperatures.
Solas 14/20 DynaFly impeller is installed. This impeller is
specifically designed for the Stage II GP1300R (`05 models). Billet
Impeller Cone is included.
RIVA GPR Performance Ride Plate and Top-Loader Intake Grate 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 GPR's tendency to drop on its nose when the throttle is
let off at high speeds.
RIVA GPR Pump Seal Kit is installed. Location specific molded
inserts are siliconed in to the voids of the OE pump inlet shoe
significantly reducing cavitation.
RIVA GPR Performance Trim Tabs are installed in place of original
trim tabs. Designed to trim craft up for increased top speed and
serve as a quick fix to unwanted proposing. Tabs are 2.5 inches
longer than stock.
RIVA GPR Pro-Series Adjustable Sponsons are installed. Sponsons
dramatically improve the handling of the GP1300R with a superior
blade design and mounting angle. Sponson depth is adjustable to
accommodate any riding style.
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