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47
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 • SUPERCHARGER COMPONENTS
R&D ULTRA 250/260X
SUPERCHARGER PULLEYS
The new R&D Racing Supercharger Pulley
Wheel will deliver a noticeable and impressive
boost in torque and overall horsepower.
Designed and manufactured from high quality
billet aluminum and precision hard anodized for
superior belt wear resistance. The R&D Pulley is 3/4 lb lighter than the
O.E.M. steel pulley, and delivers 2.5 to 3.5 lbs of additional boost pressure
along with 30 horsepower. The holeshot acceleration is a solid 1.5-2 boat
lengths over stock with a top speed gain of 1 to 2 mph over stock. The R&D
Pulley comes completely assembled with a new high performance bearing,
all necessary hardware and installation instructions.
R&D strongly recommends the use of the R&D Powershot Fuel Tuner, R&D
High Output Fuel Injectors and High Volume Fuel Pump Kit to increase fuel
flow delivery when using the R&D Supercharger Wheel. Not using these rec-
ommended parts can result in engine damage due to a lean air fuel ratio.
Description
Part No.
R&D Supercharger Pulley Wheel 1 to 1 (entry level)
611-25011
R&D Supercharger Pulley Wheel 1.05 to 1
611-25105
R&D Supercharger Pulley Wheel 1.1 to 1
611-25110
OEM Replacement Supercharger Pulley
611-25010
R&D ULTRA 250/260X
SUPERCHARGER BELT
TENSIONER WHEEL
R&D has significantly improved the Ultra 250X’s ser-
pentine belt tensioning wheel system by redesigning and precision machining a
new tensioner wheel with a larger O.D. The new R&D Tensioner Wheel offers a
wider adjustment range and helps to reduce belt slippage via more surface
area for belt contact. Wheel comes complete with precision bearing installed.
Description
Part No.
R&D Ultra 250/260X
611-25000
Supercharger Belt Tensioner Wheel
R&D ULTRA 250/260X
BEARING REBUILD KIT
R&D recommends the inspection of the
R&D Supercharger and Tensioner
wheel bearings after 15 hours and replacing them after 20 hours.
Description
Part No.
R&D Ultra 250/260X Bearing Rebuild Kit
611-25009
ULTRA 250X/260X
150/12F/15F BILLET
DRIVE COUPLERS
Billet aluminum drive coupler set for
the Kawasaki 250X & 260X. The
crank side coupler with the pulley is
1.24lbs lighter than the stock steel
coupler. The pulley diameter is the
same as stock. Uses the stock
rubber dampener. Clear anodized for protection against saltwater corrosion.
Description
Part No.
Ultra 250X/260X Billet Drive Coupler Set
31-700590
Ultra 150/12F/15F Billet Drive Coupler Set
31-700490
R&D ULTRA 250/260X CRANKCASE
VENTILATION/OIL & VAPOR SEPARATOR KIT
The R&D Ultra 250X Crankcase ventilation system was developed
to offer a complete bolt on breather expansion kit which will substantially reduce
crankcase pressures on Kawasaki Ultra 250X’s supercharged engines. High
performance engines (especially supercharged) need as much crankcase
ventilation as possible. The R&D system doubles the volume of the O.E.M.
crankcase breather and triple baffles the oil and vapor pressures within the
O.E.M. breather case. The R&D system relieves excess crankcase pressures in
the oil breather case and vents high pressures and fuel vapors into a piggyback
vapor/oil catch can reservoir. The R&D vapor/oil reservoir mounts and connects
directly to the O.E.M. oil separator system puts an end to oil blow by messes in
the engine compartment by relieving excess crankcase pressures and trapping
excess fuel vapors, condensation and blow by oil into the R&D oil/vapor separator.
Description
Part No.
R&D Ultra 250/260X Crankcase Ventilation/Oil
215-25002
and Vapor Separator Kit
R&D ULTRA 250X BILLET
BLOW OFF VALVE KIT
The R&D Billet Blow Off Valve Kit replaces
the OEM plastic valve that is prone to
leaking and is unreliable. The R&D Billet
Blow Off Valve allows for precise pressure
adjustments and has an operating range from 5lbs to 21lbs of boost.
Description
Part No.
R&D Billet Blow Off Valve Kit
611-25210
ROGUE RACING
ULTRA 250X/260X
SC PULLEYS
Rogue Racing Pulleys are
designed with bearing and belt life as one of the main upgrades from the OEM
pulley. Rogue Racing engineered these pulleys to decrease and dissipate heat to
reduce the wear on the pulley and belt from the heat generated while riding. The
pulleys also have belt guides manufactured into them to prevent the belt from
possibly jump off of the pulley. The pulleys are anodized to prevent corrosion.
Description
Part No.
Offshore/Endurance (.95 to 1 • Stock)
PR-LARGE
Closed Course (1.00 to 1 • +2.5lbs)
PR-MEDIUM
Closed Course/Slalom (1.05 to 1 • +3.5lbs)
PR-SMALL
Rogue Racing Tensioner Wheel
PR-IDLER
*
The OEM stock size pulley is ok to use on a stock engine setup.
For the smaller pulleys that increase boost a high volume fuel
pump should be used with a regulator to govern the proper fuel
pressure. To adjust the fuel pressure to the proper pressure an
AFR kit is required to monitor the exhaust gases to read the
air/fuel mixture.
31-700590