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Engine

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

$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...


$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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$499.00
Oversized NASCAR styled radiator for your ATV o No other radiator like it on the planet! o Maintains cooler operating temperatures under the...

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

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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...

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

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

$528.00 $475.20
Wiseco Valve kit includes exhaust valves, intake valves , and center valves were applicable. The LTR450 and the YFZ450 come in Titanium. The 400ex, kfx400, ltz400 come in stainless steel.

$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.


$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...

$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...

$599.00 $491.18
New big bore kit product line from the makers of the Pivotworks™, Hotcams™, and Hot Rods™. Cylinder Works offers high quality cylinders...

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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...

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

$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...

$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...

$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.

$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...

$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...

$999.00 $849.15
Kits include aluminum cylinder with a galvanic coating designed with larger water jackets for better cooling and a Forged piston with molybdenum coating for the best in performance. Each kit also contains a special gasket and easy to fallow step by step instructions. No machining is required.