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Engine

$292.00 $256.96
Forged from lightweight aero-space grade aluminum alloy ; CNC Machining ensures each identical to the next. Weight saving relief cuts on out side of clutch...

$289.00 $254.32
Hinson Billet Clutch Baskets are machined from T-6 aluminum to aerospace tolerances and Alkalized for 5 times the wear resistance over stock. Allows more oil flow over the plates for better heat dissipation, improved performance, and longer clutch life.

$265.95 $218.08
Replacement pistons for your Cylinder Works Big Bore Cylinder Kits.

$259.95
400ex Big Bore Kit (All Years) Kit includeds all parts needed to turn your 400 into a fire breathing 440cc monster! Kit inlcudes a Magnum 440cc Piston...

$255.00 $209.10
What sets Hot Cams apart from other camshafts? - Convenience and engineering! Hot Cams is the first camshaft company to produce its own cores for the dirt...

$255.00
All connecting rods are O.E.M. length Proprietary blend of materials produces the best possible part Made in the U.S.A.

$251.00 $213.35

JE has a history of manufacturing the highest quality pistons and components that a professional engine builders, race teams, and high performance enthusiasts alike trust and rely on.


$249.00 $219.12
These clutch baskets are precision machined with today's most advanced - heat treated aircraft hardened aluminum alloy. The basket's specially designed teeth...

$239.00 $179.25
Wiseco offers forged pistons that offer better performance than OEM at a reasonable price. Extensive engineering goes into each Wiseco ATV Piston to provide...

$229.95 $206.95
All Kibblewhite spring kits are the no-nonsense answer to hassle-free performance. Each kit use the highest quality materials machined to precise...

$200.00 $176.00
Hinson High Performance Clutch Kit Features: Includes fiber and steel clutch plates with springs. Can be use with O.E.M. baskets, inner hubs and...

$181.95 $172.85
Boyesen Super Color Water Pump Cover and Impeller Kit: Cast aluminum construction Increased coolant flow in all RPM ranges Patented nautilus...

$179.95 $158.36
OEM pressure are cast pieces with a very temporary life. Many racers have gone to the improved durability of a machined billet basket. Well, hereÂ’s the next level of performance and durability, the WPS machine-forged Pressure Plate by Wiseco

$179.95 $158.36
The Hinson Racing pressure plate allows the clutch assembly to spin more true, creating less heat when disengaged. Made from T-6 alloy and Alkalized for 5...

$179.80 $161.82
Kibblewhite Kit Includes: 2 - Intake Valves 2 - Exhaust Valves 1 - Center Valve (Yamaha YFZ450 Only) Each valve is fully CNC machined to precise...

$175.60 $154.53
Barnett Dirt Digger Carbon Fiber Clutch Kits Features: Extremely durable and heat tolerant Provides a smooth positive engagement and release...

$175.00 $154.00
Barnett Dirt Digger Series K Kevlar Clutch Kits Features: Friction Plates Steel Drive Plates Set of Springs Barnett Dirt Digger K Kevlar...

$169.95 $149.56
The Hinson Racing clutch cover is made from T6 aluminum and the choice of many Factory Teams. This unit improves heat dissipation and is significantly...

$160.99
Hotcams Valve Spring Kit: Fits YFM660 Raptor 01-05 Required with Stage 3 Hotcam

$155.30 $136.66
Anti-swell, alloy impregnated heavy duty cork based facings for smooth clutch take up. This allows modulation, unlike paper clutches which tend to snatch....

$149.00 $131.12
Magnum Clutch kits are race proven to meet the needs of today's off road racers.

$137.22
Hot Rod Connecting Rods are precision double honed to assure cylindrical accuracy of less than 0.003mm

$129.95
Hot Cam Installation Kit Includes: degree wheel dial indicator adjustable magnetic stand three positive stops (10mm, 12mm, 14mm...
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$120.00
38M's Breather Box replaces your stock box that leaks and/or doesn't work well, or the ltr or aftermarket breathers that are just in the way. As with...