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Engine

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The new Cylinder Works O.E.M. replacement cylinder is a standard cylinder from the makers of the Pivotworks™, Hotcams™, and Hot Rods™....

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New big bore cylinders from the makers of the Pivotworks™, Hotcams™, and Hot Rods™. Cylinder Works offers high quality cylinders that...

$0.00
Cometic is one of the top names in the industry for quality gaskets. Manufactured to standards that exceed OEM specifications. Cometic offers a range of...

$0.00
These kits offer every gasket you need for a complete rebuild. O.E.M. quality for long life. Silicone lined coating on base gaskets to keep them from...

$0.00
With over 50 years of experience, JE pistons is the leader in high performance forged pistons. JE Pistons have built a reputation that the competition can...

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CP Piston comes complete with rings, circlips , and wristpin. Made in the USA from the highest quality materials and with world leading technology...

$0.00
K&S
K&S Engine Oil Seal Highlights: Direct OEM Replacements Cheaper than OEM

$0.00
Winderosa Complete Gasket Sets include all gaskets necessary to rebuild the engine and transmission. The base and head gaskets are designed for OEM bore....

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Cylinder - new, not remanufactured, cast aluminum nickel silicon carbide (NSC) electroplated stock bore cylinder that appears just like an OE cylinder. NSC...

$349.95
*Out Of Stock* Mud Buster camshafts are selected to maximize torque at low RPM and small amounts of throttle opening for low speed riding...

$917.00 $687.75
Wrench Rabbit Complete Rebuild Kit In A Box Features: Vertex Piston (Standard Compression, Piston, Rings, Pin, and Clips Hot Rods Heavy Duty...

$29.95
In line temperature reducer increases cooling efficiency of any water cooled all terrain vehicle. The Pro Design Super Coolers Reduces cooling temperatures...
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$34.95 $30.76
PRO X Pressure Plates are precision machined from heat treated aircraft type aluminum alloy to O.E. precision standards. Sophisticated hard-anodizing...

$37.29
Manufactured by the leading O.E.M. factory in Japan Die-cast parts are machined to O.E.M. specifications and tolerance for perfect fit Parts are a...

$56.95 $50.12
PRO X Inner Clutch Hubs are precision machined from heat treated aircraft type aluminum alloy to O.E. precision standards. Sophisticated hard-anodising...

$59.95 $56.35
Hot Rods is proud to introduce their line of precision , high quality , main bearings and seal kits, which are designed to support OEM or Hotrods crank line.

$88.89 $80.00
The Wiseco cam chain is made from the highest quality select steel alloys that are light, yet provide maximum strength.

$89.95
  7.48mm Valve Shims Includes three 7.48mm OD shims in each size from 1.20mm to 3.50 in .05mm increments 9.48mm Valve Shims...

$119.00 $107.10
    * Magnum/YBN cam chains are made to meet or exceed OEM standards. * ISO 9001 certified.

$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...

$129.95
Hot Cam Installation Kit Includes: degree wheel dial indicator adjustable magnetic stand three positive stops (10mm, 12mm, 14mm...
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$137.22
Hot Rod Connecting Rods are precision double honed to assure cylindrical accuracy of less than 0.003mm

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

$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....

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

$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...

$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...

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

$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...

$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...

$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...

$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...

$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...

$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...

$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...

$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.


$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.

$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...

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

$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.

$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...

$299.00
The Hi-FLo Oversize Radiators ensure modified motors maintain peak horsepower by increasing the efficiency of the cooling system. The Hi-Flo radiators...

$299.95 $263.96
The Hinson Racing Inner Clutch Hub is designed to help eliminate clutch chatter, spin more true, and create less heat in the clutch. All of these add up to a...

$329.00 $289.52
Eliminates excessive clutch slipping. Transfer all of your horsepower to the rear tires. Increase the quickness of your ATV....

$368.00 $323.84
OEM inner hubs 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...

$369.95
  TRX400EX Displacement - 440cc Bore size - 4.00" Compression ratio - 12.5:1 Cylinder sleeving required Kit Includes: Piston,...