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KAWASAKI
4 STROKE
INATKE
SYSTEMS
ENGINE/
GASKETS
EXHAUST DRIVE LINE
HANDLING
ELECTRICAL WATERLINE
/BILGE
STEERING
& CONTROLS
BODY
ACCESSORIES
SERVICE TOOLS
/HARDWARE
CHEMICAL
ULTRA 250X/260X • EXHAUST
RIVA RACING
BLOCK-OFF VALVE COVER KAW 4-STROKE
ENGINE ULTRA 250X/LX; STX-15F/12F
The Ultra 250X Valve Cover Block-off Kit is designed to seal off the ports
on the valve cover when removing the emission control system for racing
applications. There are two major benefits to removing the factory
emissions system:
1) For racing applications it is recommended to remove all necessary equip-
ment from your craft for increased reliability and reduced maintenance. This
also cleans up plumbing in the engine compartment providing a clean look.
2) To accurately monitor air/fuel ration for tuning purposes you must remove
the emissions system. The OEM system pumps fresh air into the exhaust
stream throwing off air/fuel ratio.
Plates are precision machined from billet aluminum and anodized to prevent
corrosion. Includes two block-off plates and installation instructions.
Description
Part No.
Riva Racing Ultra 250X (07)/LX (07),
RK19090-VCB
STX-15F, STX-12F Exhaust Emissions Block-off Kit
R&D Ultra 250X (07)/LX (07), STX-15F,
331-25000
STX-12F Exhaust Emission Block-off Kit
RIVA RACING BILLET
EXHAUST TIP FOR
ULTRA 250X/LX,
260X, STX-15F/12F
Quickly and easily add style to your
craft with this direct replacement for
the stock, plastic exhaust tip. Made
from billet aluminum with laser
etched graphics. Anodized to
prevent corrosion.
Description
Part No.
Riva Racing Billet Aluminum Exhaust Tip
RK16086
Ultra 250X/LX, 260X, STX-15F, STX-12F
Riva Racing Billet Aluminum Exhaust Outlet
RK16090-EO
Ultra 250X/LX, 260X, STX-15F, STX-12F
R&D BILLET
EXHAUST OUTLET
The new R&D Billet Exhaust Outlet.
The exhaust outlet has four holes
for the Kawasaki Ultra 250 and 260.
Description
Part No.
3" Diameter R&D Billet Exhaust Outlet
331-25300
2.75" Diameter R&D Billet Exhaust Outlet
331-25275
R&D HIGH
TEMPERATURE
SILICON COUPLINGS
Description
Part No.
3"-3" High Temp Silicon Couplings
061-30030
3"-2" Reducer High Temp Silicon Couplings
061-32500
2.75"-2.5" Reducer High Temp Silicon Couplings
061-32501
3"-2.75" Reducer High Temp Silicon Couplings
061-32750
RIVA RACING
PRO-SERIES
ULTRA
250/260X
WATER BOX
The Riva Racing Pro-
Series Water Box deliv-
ers increased horse-
power and performance by reducing exhaust restriction and back pressure.
Feature lightweight aluminum construction and precise fit.
07 Models:
Direct replacement for original water box. Use with RIVA Free
Flow Exhaust Kit RK16090.
08 Models:
Direct replacement for original water box. Features larger outlet
(2-1/4“) compared to stock water box (1-3/4“). Must be used with RIVA Free
Flow Exhaust Kit RK16090-08.
Description
Part No.
RIVA Ultra 250/260X Pro-Series Water Box
RK16091
RIVA EXHAUST KIT, FREE FLOW ULTRA 250X
Enables you to bypass or remove secondary muffler (weight savings of
+10lbs) improving engine performance by reducing backpressure and harmful
detonation. Formed aluminum exhaust tube is lightweight and powder coated
to resist corrosion. Included billet exhaust tip (also sold separately) with laser-
etched graphics is anodized to prevent corrosion. High temperature silicone
couplers included with detailed installation instructions.
Description
Part No.
Riva Racing Free Flow
RK16090
Exhaust Kit Ultra 250X (07)/LX (07)
Riva Racing Free
RK16090-08*
Flow Exhaust Kit Ultra 250X (08)/260X
*Note: Must use with Part # RS16091 Riva Racing Waterbox