Dirt Bike Engine

Prox - 09120656 - Piston Rings - 39.50 mm - KTMFeaturesHigh quality rings which allow for optimum heat transfer and sealingCan be used in cast iron bores, nickel ceramic platings (Nikasil), boron composite and electrofusion boresSpecsUnitsSetPiston...

Prox - 09120654 - Piston Rings - 48.50 mm - KawasakiFeaturesHigh quality rings which allow for optimum heat transfer and sealingCan be used in cast iron bores, nickel ceramic platings (Nikasil), boron composite and electrofusion boresSpecsUnitsSetBore...

Prox - 09120653 - Piston Rings - 77.00 mm - SuzukiFeaturesHigh quality rings which allow for optimum heat transfer and sealingCan be used in cast iron bores, nickel ceramic platings (Nikasil), boron composite and electrofusion boresSpecsPiston...

Prox - 09120647 - Piston Rings - 66.00 mm - HondaFeaturesHigh quality rings which allow for optimum heat transfer and sealingCan be used in cast iron bores, nickel ceramic platings (Nikasil), boron composite and electrofusion boresSpecsProduct NamePiston...

Prox - 09104545 - Piston Kit - 44.99 mm - Gas Gas | Husqvarna | KTMFeaturesCast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerancesKit includes piston, ring kit, wrist pin,...

Prox - 09104547 - Piston Kit - 53.95 mm - Beta | Gas Gas | Husaberg | Husqvarna | KTMFeaturesCast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerancesKit includes piston,...

Prox - 09104543 - Piston Kit - 76.97 mm - Kawasaki KX250FFeaturesPrecision machined on state of the art CNC equipmentMade with low expansion, low friction alloyReplacement Part for OEM Number(s):130010730SpecsProduct NamePiston KitBore - Oversize...

Prox - 09104539 - Piston Kit - 76.96 mm - Suzuki RMZ250FeaturesPrecision machined on state of the art CNC equipmentMade with low expansion, low friction alloyReplacement Part for OEM Number(s):1211149H100F0SpecsCompression Ratio Imperial13...

Prox - 09104535 - Piston Kit - 76.79 mm - Honda CRF250RFeaturesPrecision machined on state of the art CNC equipmentMade with low expansion, low friction alloyReplacement Part for OEM Number(s):13101KRNA80SpecsTypeStandard Size CBore -...

Pro Circuit - 09310477 - Power Valve - Kawasaki KX85 '02-'13FeaturesMaintain peak horsepower with huge gains in the bottom endConstructed of billet stainless steelMade in the USASpecsMaterialStainless SteelUnitsEachRiding StyleOff-RoadProduct NamePower...

Prox - 09261461 - Valve and Spring Kit - Intake - SuzukiFeaturesSteel, nitrided valves for increased durability and less wear under extreme conditionsStronger valve springs deal with the extra weight of the steel valvesSprings are made from premium...

Prox - 09230322 - Connecting Rod Kit - KawasakiFeaturesEasy to installSpecsEngine Type4-StrokeMaterialForged SteelProduct NameConnecting Rod KitRiding StyleOff-RoadUnitsEachFitment2012-2016KawasakiKX250F

Prox - 09230237 - Connecting Rod Kit - HondaFeaturesEasy to installSpecsRiding StyleOff-RoadProduct NameConnecting Rod KitEngine Type2-StrokeMaterialForged SteelUnitsKitFitment2007-2025HondaCRF150R

Psr - 09250786 - Cam Chain Tensioner - HondaFeaturesReplaces OEM automatic/hydraulic tensionerEliminates out-of-timing problems caused by the OEM automatic tensionerEliminates excess tension/premature engine wear caused by OEM hydraulic...

Psr - 09250794 - Cam Chain Tensioner - SuzukiFeaturesReplaces OEM automatic/hydraulic tensionerEliminates out-of-timing problems caused by the OEM automatic tensionerEliminates excess tension/premature engine wear caused by OEM hydraulic...

Prox - 09106108 - Piston Kit - 63.94 mm - KTM 200EXCFeaturesOversized options follow manufacturer piston to cylinder wall clearancesKit includes piston, ring kit, wrist pin, and circlipsSpecsBore - OversizeStandardRiding StyleOff-RoadDisplacement200...

Prox - 09106102 - Piston Kit - 39.46 mm - KTM 50 Adventure/50SXFeaturesOversized options follow manufacturer piston to cylinder wall clearancesKit includes piston, ring kit, wrist pin, and circlipsSpecsBore - Oversize MetricStandardEngine...

Prox - 09106103 - Piston Kit - 39.47 mm - KTM 50 Adventure/50SXFeaturesOversized options follow manufacturer piston to cylinder wall clearancesKit includes piston, ring kit, wrist pin, and circlipsSpecsPiston MaterialAluminum AlloyUnitsKitSkirt...

Prox - 09105971 - Piston Kit - 57.96 mm - Gas Gas | Husqvarna | KTMFeaturesOversized options follow manufacturer piston to cylinder wall clearancesKit includes piston, ring kit, wrist pin, and circlipsSpecsEngine Type2-StrokeRiding StyleStreetPiston...

Prox - 09106109 - Piston Kit - 63.95 mm - KTM 200 EXCFeaturesOversized options follow manufacturer piston to cylinder wall clearancesKit includes piston, ring kit, wrist pin, and circlipsSpecsDisplacement200 ccEngine Type2-StrokeProduct NamePiston...

Prox - 09106107 - Piston Kit - 53.95 mm - KTM 125SXFeaturesOversized options follow manufacturer piston to cylinder wall clearancesKit includes piston, ring kit, wrist pin, and circlipsSpecsBore - Oversize MetricStandardEngine Type2-StrokeRiding...

Prox - 09106106 - Piston Kit - 53.94 mm - KTM 125SXFeaturesOversized options follow manufacturer piston to cylinder wall clearancesKit includes piston, ring kit, wrist pin, and circlipsSpecsBore Size Metric54.00 mmCompression Ratio...

Prox - 09106098 - Piston Kit - 47.00 mm - Yamaha BW80/PW80FeaturesOversized options follow manufacturer piston to cylinder wall clearancesKit includes piston, ring kit, wrist pin, and circlipsSpecsDisplacement80 ccPiston MaterialCastPiston Size...

Prox - 09105970 - Piston Kit - 57.95 mm - Gas Gas | Husqvarna | KTMFeaturesOversized options follow manufacturer piston to cylinder wall clearancesKit includes piston, ring kit, wrist pin, and circlipsSpecsBore - OversizeStandardBore Size Metric58.00...

Psr - 09251258 - Cam Chain Tensioner - HondaFeaturesReplace OEM automatic/hydraulic tensionerRemove out-of-timing problems, premature engine wear and excess tension caused by an automatic tensionerEliminate cam chain rattling caused by factory tensioner...

Psr - 09251260 - Cam Chain Tensioner - KTMFeaturesReplace OEM automatic/hydraulic tensionerRemove out-of-timing problems, premature engine wear and excess tension caused by an automatic tensionerEliminate cam chain rattling caused by factory tensioner...

Psr - 09251257 - Cam Chain Tensioner - Beta | KTMFeaturesReplace OEM automatic/hydraulic tensionerRemove out-of-timing problems, premature engine wear and excess tension caused by an automatic tensionerEliminate cam chain rattling caused by factory...

Rekluse - 09401820 - Clutch Cover - YamahaFeaturesReady to ride whenever you are, standing up against rocks, logs, boots and whatever else you may encounter in your adventuresBillet aluminum construction provides incredible strengthClutch covers are...

Prox - 09106808 - Piston Kit - 94.95 mm - Beta 400RRFeaturesThe piston is precision machined on state of the art CNC equipmentPiston rings are made by OEM factories to exact specificationsSpecsBore Size Metric95.00 mmCompression Ratio Imperial12...

Prox - 09106781 - Piston Kit - 96.95 mm - Yamaha WR450F/YZ450F/YZ450FXFeaturesThe piston is precision machined on state of the art CNC equipmentPiston rings are made by OEM factories to exact specificationsSpecsBore - OversizeStandardTypeStandard Size...

Prox - 09106807 - Piston Kit - 71.94 mm - BetaFeaturesCast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerancesKit includes piston, ring kit, wrist pin, and circlipsSpecsBore...

Prox - 09106805 - Piston Kit - 87.96 mm - Beta 350RRFeaturesThe piston is precision machined on state of the art CNC equipmentPiston rings are made by OEM factories to exact specificationsSpecsBore Size Metric88.00 mmProduct NamePiston KitRiding...

Prox - 09106803 - Piston Kit - 71.94 mm - Sherco 300SE/300SE-RFeaturesCast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerancesKit includes piston, ring kit, wrist pin, and...

Prox - 09106792 - Piston Kit - 57.94 mm - Husqvarna TE150i | KTM 150EXC TPIFeaturesCast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerancesKit includes piston, ring kit,...

Prox - 09106799 - Piston Kit - 75.96 mm - Sherco 250SE-F/250SEF-RFeaturesThe piston is precision machined on state of the art CNC equipmentPiston rings are made by OEM factories to exact specificationsSpecsBore Size Metric76.00 mmDisplacement250 ccPiston...

Prox - 09106793 - Piston Kit - 87.96 mm - Gas Gas | Husqvarna | KTMFeaturesThe piston is precision machined on state of the art CNC equipmentPiston rings are made by OEM factories to exact specificationsSpecsBore - Oversize MetricStandardCompression...

Prox - 09106780 - Piston Kit - 53.95 mm - Yamaha YZ125/YZ125XFeaturesCast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerancesKit includes piston, ring kit, wrist pin, and...

Prox - 09106779 - Piston Kit - 78.97 mm - Honda CRF250R/CRF250RXFeaturesThe piston is precision machined on state of the art CNC equipmentPiston rings are made by OEM factories to exact specificationsSpecsBore - OversizeStandardEngine...

Prox - 09106783 - Piston Kit - 96.95 mm - Yamaha WR450F/YZ450F/YZ450FXFeaturesThe piston is precision machined on state of the art CNC equipmentPiston rings are made by OEM factories to exact specificationsSpecsBore - OversizeStandardEngine...

Prox - 09106782 - Piston Kit - 96.95 mm - Yamaha WR450F/YZ450F/YZ450FXFeaturesThe piston is precision machined on state of the art CNC equipmentPiston rings are made by OEM factories to exact specificationsSpecsBore - Oversize MetricStandardPiston...