Dirt Bike Engine

Prox - 09261456 - Valve and Spring Kit - Exhaust - 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 - 09260671 - Intake Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14721KBB900SpecsRiding StyleOff-RoadApplicationIntakeProduct...

Prox - 09261455 - Valve and Spring Kit - Exhaust - Gas Gas | YamahaFeaturesSteel, 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...

Prox - 09261458 - Valve and Spring Kit - Intake - HondaFeaturesSteel, 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 chrome...

Prox - 09261436 - Valve and Spring Kit - Intake - Husaberg | KTMFeaturesSteel, 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...

Prox - 09261435 - Valve and Spring Kit - Intake - KTMFeaturesSteel, 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 chrome...

Prox - 09261421 - Exhaust Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14721MENA30SpecsApplicationExhaustUnitsEachProduct NameValveMaterialSteelRiding...

Prox - 09261432 - Valve and Spring Kit - Intake - YamahaFeaturesSteel, 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 - 09261429 - Valve and Spring Kit - Exhaust - KTMFeaturesSteel, 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 chrome...

Prox - 09260664 - Exhaust Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14721GF6000SpecsApplicationExhaustProduct NameValveUnitsEachMaterialSteelRiding...

Prox - 09260679 - Intake Valve - YamahaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):5HP1211101SpecsApplicationIntakeMaterialSteelProduct NameValveUnitsEachRiding...

Psr - 09251033 - 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...

Prox - 09100431 - Piston Kit - 47.94 mm - Suzuki RM85FeaturesCast 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 - 09260688 - Exhaust Valve - Beta | Husaberg | KTM | PolarisFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):59036031000SpecsRiding StyleAdventure Touring / Dual-SportRiding...

Prox - 09261419 - Exhaust Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14721KRNA40SpecsRiding StyleOff-RoadUnitsEachMaterialSteelApplicationExhaustProduct...

Prox - 09260675 - Exhaust Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14721437000SpecsMaterialSteelRiding StyleOff-RoadUnitsEachProduct...

Prox - 09100427 - Piston Kit - 76.98 mm - Kawasaki KX250F | Suzuki RMZ250FeaturesPrecision machined on state of the art CNC equipmentMade with low expansion, low friction alloyReplacement Part for OEM Number(s):130010052SpecsBore - OversizeStandardPiston...

Prox - 09260676 - Intake Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14721437000SpecsUnitsEachMaterialSteelRiding StyleOff-RoadProduct...

Prox - 09260689 - Intake Valve - Beta | Husaberg | KTM | PolarisFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):59036030000SpecsProduct NameValveRiding StyleATVUnitsEachRiding...

Prox - 09260670 - Exhaust Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14721KBB900SpecsMaterialSteelRiding StyleOff-RoadApplicationExhaustProduct...

Prox - 09260678 - Exhaust Valve - YamahaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):5HP1212100SpecsUnitsEachApplicationExhaustProduct NameValveMaterialSteelRiding...

Prox - 09260674 - Intake Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14711KCZ000SpecsMaterialSteelRiding StyleOff-RoadProduct...

Prox - 09260673 - Exhaust Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14711KCZ000SpecsUnitsEachMaterialSteelRiding StyleOff-RoadApplicationExhaustProduct...

Prox - 09260669 - Intake Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14721KSE670SpecsMaterialSteelRiding StyleOff-RoadApplicationIntakeUnitsEachProduct...

Prox - 09260668 - Exhaust Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14721KSE670SpecsMaterialSteelRiding StyleOff-RoadProduct...

Prox - 09100401 - Piston Kit - 48.00 mm - HondaFeaturesOversize piston options follow manufacturer piston to cylinder wall clearancesPrecision machined on state of the art CNC equipmentKit includes piston, rings, wrist pin and circlipsReplacement Part...

Prox - 09100596 - Piston Kit - 53.97 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 - 09260667 - Intake Valve - HondaFeaturesConstructed to meet OEM specificationsAvailable in standard sizes onlyReplacement Part for OEM Number(s):14721KRM840SpecsMaterialSteelRiding StyleOff-RoadProduct...

Prox - 09100597 - Piston Kit - 53.94 mm - Honda CR125RFeaturesCast 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 - 09100426 - Piston Kit - 76.97 mm - Kawasaki KX250F | Suzuki RMZ250FeaturesPrecision machined on state of the art CNC equipmentMade with low expansion, low friction alloyReplacement Part for OEM Number(s):130010052SpecsPiston Size Metric76.97...

Prox - 09100419 - Piston Kit - 95.97 mm - Honda CRF450RFeaturesPrecision machined on state of the art CNC equipmentMade with low expansion, low friction alloyReplacement Part for OEM Number(s):13101MEB670SpecsDisplacement450 ccBore Size Metric96.00...

Prox - 09100599 - Piston Kit - 53.96 mm - Honda CR125RFeaturesCast 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 - 09100025 - Piston Kit - 53.96 mm - Kawasaki KX125FeaturesCast 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 - 09100440 - Piston Kit - 94.96 mm - Gas Gas | YamahaFeaturesPrecision machined on state of the art CNC equipmentMade with low expansion, low friction alloyReplacement Part for OEM Number(s):5TJ1163100SpecsRiding StyleAdventure Touring /...

Prox - 09100027 - Piston Kit - 76.95 mm - Gas Gas | YamahaFeaturesPrecision machined on state of the art CNC equipmentMade with low expansion, low friction alloyReplacement Part for OEM Number(s):5NL1163120SpecsBore Size Metric77.00 mmEngine...

Prox - 09100399 - Piston Kit - 47.00 mm - HondaFeaturesOversize piston options follow manufacturer piston to cylinder wall clearancesPrecision machined on state of the art CNC equipmentKit includes piston, rings, wrist pin and circlipsReplacement Part...

Prox - 09100021 - Piston Kit - 47.46 mm - Honda CR85RFeaturesCast 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 - 09100020 - Piston Kit - 47.45 mm - Honda CR85RFeaturesCast 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 - 09030829 - Piston Kit - 94.97 mm - Gas Gas | YamahaFeaturesPrecision machined on state of the art CNC equipmentMade with low expansion, low friction alloyReplacement Part for OEM Number(s):5TJ1163100SpecsBore - OversizeStandardUnitsKitBore -...

Prox - 09100022 - Piston Kit - 44.45 mm - Kawasaki KX65 | Suzuki RM65FeaturesCast 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...