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59
CATALYTIC CONVERTER REMOVAL PLATE
FOR YAMAHA GPR
This plate allows you to remove the catalytic converter easily and fills the gap
where the catalytic converter mounts on the OEM exhaust system. Benefits
include a cooler running exhaust system and ability to run any kinds of two-
stroke oil. The plate features a centrally located outlet designed to give some
beneficial back pressure but with much better exhaust gas flow compared to an
offset or cutout plate. This gives better response and acceleration throughout
the power band.
Part No.
YE-155P
332-12000
Description
JetWorks Catalytic Converter Removal Plate
R&D D-Plate
JETWORKS FLOW CONTROL VALVE
The Flow Control Valve provides improved throttle response and much quicker
starts by drying out your waterbox at low rpm and idle speeds. Tests have shown
an average acceleration improvement of 10 feet over a non-equipped model in the
first 50 feet. The Flow Control Valve allows unrestricted water flow to the Stinger for
better top speed.Yet it controls the amount of water at low speeds for better
response. It also allows for an easier tuning of the Carburetors. It does not interfere
with normal engine or exhaust pipe cooling and is compatible with all electronic
water injection systems. Race Legal for All Classes.Two Models are available. Both
are adjustable. The Standard Flow Control Valve is preset at 3.5 p.s.i. and is
adjusted by adding the supplied stainless steel shims to increase the spring
tension. The Pro-Series is externally adjustable by turning the outer housing by
hand. Pressure can be tested with pop off gauge. All PWC w/OEM or aftermarket
exhaust systems (except Yamaha’s w/OEM exhaust)
Part No.
52-3118
52-3119
52-3122
Description
Standard Flow Control Valve
3/8”
Pro Flow Control Valve
3/8”
Pro Flow Control Valve
1/4”
RIVA EXHAUST STINGER
WATER FILTER/RESTRICTOR
Features fine mesh stainless filter screen that is threaded to
accept Mikuni main jet (not included) for water restriction.
Allows removal of restrictive filter screen in water distribution
manifold of single, twin and triple exhaust systems, providing
increased cooling water to motor.
Part No.
RY15-SF38
Description
Exhaust Stinger Water Filter/Restrictor 3/8”
JETWORKS QUICK DISCONNECT
WATER RESTRICTOR
QD-38 comes with 4/3/2mm restrictor inserts used for
controlling water flow through exit passes, stinger, head pipes,
etc. QD-14 is for use with Mikuni Jets (not included), and allows
quick change in small increments of water flow.
Part No.
QD-38
QD-14
Description
Quick Disconnect Water Restrictor 3/8”
Quick Disconnect Water Restrictor 1/4”
RIVA Cat Temp Sensor Chip is a must when removing the OEM catalytic
converter on Yamaha GP1200 Powervalve engines. The circuit is
designed to mimic the signal sent to the OEM CDI by the catalytic
converter’s temperature probe preventing CDI, flutters, warning devices
and engine shut downs due to cat removal. Can be used with stock or
modified OEM CDI’s. Plugs directly into factory wire harness.
Description
Part No.
Cat Temp Sensor Chip Yamaha 1200 Powervalve (66V)
RY115-20
RIVA CAT TEMP SENSOR CHIP FOR GPR
QD-14
QD-38