Dirt Bike Engine
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts.
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PROX Valve Shim Kit 29.VSA748
PROX
$109.95PROX Valve Shim Kit 29.VSA748Made using a specific heat-treatment to ensure hardness for maximum durability and less wear, Precision machined to match exact size, Inexpensive and easy replacement for expensive OEM shims09261018- SKU:
- 09261018
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SHIM KIT
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 1.20 MM - 3.50 MM
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
$109.95 -
PROX Valve and Spring Kit 28.SIS2424-2
PROX
$195.95PROX Valve and Spring Kit 28.SIS2424-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...09261024- SKU:
- 09261024
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$195.95 -
PROX Valve and Spring Kit 28.SIS6329-2
PROX
$149.95PROX Valve and Spring Kit 28.SIS6329-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...09261436- SKU:
- 09261436
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
$149.95 -
PROX Valve and Spring Kit 28.SES4335-1
PROX
$149.95PROX Valve and Spring Kit 28.SES4335-1Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...09261457- SKU:
- 09261457
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- SPRING KIT
- MATERIAL:
- STEEL
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE
$149.95 -
PROX Valve and Spring Kit 28.SIS2402-2
PROX
$195.95PROX Valve and Spring Kit 28.SIS2402-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...09261460- SKU:
- 09261460
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- UNITS:
- KIT
$195.95 -
PROX Piston Kit 01.1320.A2
PROX
$139.95PROX Piston Kit 01.1320.A2Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances, Pistons supplied in a kit...PX4430C- SKU:
- PX4430C
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 66.36 MM
- PISTON SIZE METRIC:
- STANDARD SIZE A
- BORE SIZE METRIC:
- 66.36 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$139.95 -
PROX Exhaust Valve 28.6520-1
PROX
$54.95PROX Exhaust Valve 28.6520-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only09260688- SKU:
- 09260688
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$54.95 -
PROX Top End Gasket Set - Kawasaki/Suzuki 35.4334
PROX
$59.95PROX Top End Gasket Set Kawasaki/Suzuki 35.4334PROX Top End Gasket Set - Kawasaki/Suzuki09345766- SKU:
- 09345766
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$59.95 -
PROX Valve and Spring Kit 28.SIS1403-2
PROX
$139.95PROX Valve and Spring Kit 28.SIS1403-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...09261020- SKU:
- 09261020
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- KIT
- TYPE:
- VALVE
$139.95 -
PROX Connecting Rod Kit 03.6011
PROX
$109.95PROX Connecting Rod Kit 03.6011Come complete with crankpin, big-end bearing, small-end bearing and washers, Easy to install09230625- SKU:
- 09230625
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$109.95 -
PROX Crank Bearing and Seal Kit 23.CBS61003
PROX
$89.95PROX Crank Bearing and Seal Kit 23.CBS61003Made to exact OEM specifications for maximum performance and durability, Includes all necessary bearings/seals for a component's replacement, For use with OEM or Pro X crankshafts09240360- SKU:
- 09240360
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- BEARING AND SEAL KIT
- TYPE:
- BALL
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- 2-STROKE
- UNITS:
- KIT
$89.95 -
PROX Gasket Kit - Complete - KTM 34.6019
PROX
$94.95PROX Gasket Kit Complete KTM 34.6019PROX Gasket Kit - Complete - KTM09345614- SKU:
- 09345614
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
$94.95Qty in Cart: 0Quantity:Price:$94.95Subtotal: -
Hinson Racing Engine Plug Kit for 2009-2016 Honda CRF450R EPK489
HINSON RACING
$69.99Upgrade your Honda's performance with the HINSON RACING Engine Plug Kit. Crafted from high-quality billet aluminum, this kit ensures durability and precision for optimal engine functionality. Proudly made in the U.S.A., it combines advanced engineering...09500539- SKU:
- 09500539
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- PLUG KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- BILLET ALUMINUM
- TYPE:
- ENGINE
$69.99 -
Hinson Racing Engine Plug Kit for Honda CRF250R 2004-2017 EPK494
HINSON RACING
$69.99Experience unparalleled performance with the HINSON RACING Engine Plug Kit for Honda (EPK494). Crafted from high-quality billet aluminum, this kit is designed for durability and precision, ensuring a perfect fit for your engine. With its sleek design and...09500540- SKU:
- 09500540
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- PLUG KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- ENGINE
$69.99 -
Hinson Racing Oil Filler Cap for Honda CR125R 1987-2007 OC154X
HINSON RACING
$19.99HINSON RACING Oil Filler Cap for Honda OC154X Upgrade your ATV's performance and aesthetics with the HINSON RACING Oil Filler Cap. Crafted from high-quality T-6 aluminum, this cap not only replaces the stock plastic plug but also enhances your ride with...09500614- SKU:
- 09500614
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CAP
- TYPE:
- OIL FILLER
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$19.99 -
Hinson Racing Oil Filler Cap Yamaha YZ85 2002-2022 OC213
HINSON RACING
$19.99HINSON RACING Oil Filler Cap for Yamaha OC213 Elevate your ATV's performance and aesthetics with the HINSON RACING Oil Filler Cap, expertly crafted from durable T-6 aluminum. This precision-engineered component not only replaces the standard plastic plug...09500615- SKU:
- 09500615
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- CAP
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILLER
$19.99 -
Hinson Racing Oil Filler Cap Suzuki RM-Z250 2007-2025 OC230
HINSON RACING
$19.99HINSON RACING Oil Filler Cap RMZ/LTR OC230 Elevate your ATV's performance and aesthetics with the HINSON RACING Oil Filler Cap. Crafted from premium T-6 aluminum, this cap not only replaces the stock plastic plug but also adds a sleek, factory-inspired...09500617- SKU:
- 09500617
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- POLISHED
- PRODUCT NAME:
- CAP
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILLER
$19.99 -
Hinson Racing Oil Filler Cap for 2003-2018 KTM 250 SX OC255
HINSON RACING
$19.99HINSON RACING Oil Filler Cap KTM OC255 Enhance the performance and aesthetics of your ATV with the Hinson Racing Oil Filler Cap. Crafted from high-quality T-6 aluminum, this cap not only replaces the stock plastic plug but also gives your machine a...09500618- SKU:
- 09500618
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- POLISHED
- PRODUCT NAME:
- CAP
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILLER
$19.99Qty in Cart: 0Quantity:Price:$19.99Subtotal: -
Hinson Racing Billetproof Clutch Cover 2021-2025 Kawasaki KX250 C557-2101
HINSON RACING
$169.99Enhance your KX250's performance with the HINSON RACING Clutch Cover C557-2101. Designed for superior heat dissipation and durability, this clutch cover is a must-have for serious riders looking to elevate their racing experience. Proudly made in the U.S...09402006- SKU:
- 09402006
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MODEL:
- BILLETPROOF
- COLOR/FINISH:
- BLACK
- MATERIAL:
- T-6 ALUMINUM
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
$169.99 -
Hinson Racing Clutch Cover for Honda CRF250R 2018-2026 C794-0817
HINSON RACING
$159.99HINSON RACING Clutch Cover CRF250R C794-0817 Enhance the performance and durability of your CRF250R with the HINSON RACING Clutch Cover. Crafted from high-quality billet T-6 aircraft aluminum, this clutch cover is designed to withstand extreme conditions...09401724- SKU:
- 09401724
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- TYPE:
- CLUTCH
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- T-6 ALUMINUM
$159.99
