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Engine

$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...

$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...

$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...

$1,099.00
The best manual clutch available, period. Core Manual TorqDrive delivers unprecedented performance, tuning and durability. TorqDrive provides more disks in...


$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...

$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...

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

$429.95
Magnum TRX440EX Big Bore Kit  TRX440EX Steel Bore Cylinder kit Namura 440cc Big Bore Piston Kit Namura 440cc Gasket Kit....

$1,095.00 $963.60
Hinson Slipper Clutch BTL (Black Torque Limiter) Features: Revolutionary slipper clutches used by factory race teams Precision machined...

$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....

$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...

$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...

$129.95
Hot Cam Installation Kit Includes: degree wheel dial indicator adjustable magnetic stand three positive stops (10mm, 12mm, 14mm...
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$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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The new Cylinder Works O.E.M. replacement cylinder is a standard cylinder from the makers of the Pivotworks™, Hotcams™, and Hot Rods™....

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

$763.99 $649.39
Athena Standard Bore Features: Wider water jackets nickel carbine coated cylinder Comes with: Piston, Rings, Circlips, Cylinder, and top...

$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.

$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...

$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...

$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...

$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...