Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. 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 to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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MOOSE RACING Complete Motor Gasket Kit - YZ450F/WR450F 808994
MOOSE RACING
$142.88Moose can now handle all your gasket and seal needs at a fraction of OEM cost., High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...09345997- SKU:
- 09345997
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$142.88 -
MOOSE RACING Top End Gasket Kit Yamaha 810994
MOOSE RACING
$61.26Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...09345998- SKU:
- 09345998
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
$61.26 -
MOOSE RACING Complete Motor Gasket Kit - Arctic Cat/Suzuki 808828
MOOSE RACING
$66.50Moose can now handle all your gasket and seal needs at a fraction of OEM cost., High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...M808828- SKU:
- M808828
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- RIDING STYLE:
- ATV
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- UNITS:
- KIT
$66.50 -
LA Sleeve Sleeve and Piston Kit Kawasaki KX100 2014-2019 LAS5779K
LA SLEEVE
$326.95Upgrade your motorcycle's performance with the LA SLEEVE Sleeve and Piston Kit, designed specifically for Kawasaki models. This comprehensive kit offers an exceptional solution for top-end rebuilds, enhancing engine efficiency and power output...09310862- SKU:
- 09310862
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SLEEVE AND PISTON KIT
$326.95 -
LA Sleeve Cylinder Sleeve 47.50mm Bore for 2003-2004 Honda CR85R CR85RB Expert H5488
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5488, designed for optimal performance and durability. This high-quality replacement sleeve ensures your cylinders operate like new, extending the life of your engine. Perfect for those who...09310001- SKU:
- 09310001
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE SIZE METRIC:
- 47.50 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
$117.95Qty in Cart: 0Quantity:Price:$117.95Subtotal: -
LA Sleeve Cylinder Sleeve 95mm Yamaha YZ426F 2000-2002 YA5424
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve YA5424, designed to restore performance and extend the life of your old cylinders. Engineered for precision and durability, this replacement sleeve ensures a perfect fit and optimal functionality,...09310011- SKU:
- 09310011
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- BORE SIZE METRIC:
- 95.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$131.95 -
LA Sleeve Cylinder Sleeve 95mm Bore for KTM 520 2000-2002 FL5437
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5437, designed for superior performance and durability. This high-quality replacement sleeve ensures a perfect fit, extending the life of your cylinders and enhancing overall engine efficiency...09310035- SKU:
- 09310035
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- BORE SIZE METRIC:
- 95.00 MM
- COLOR/FINISH:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
$131.95 -
LA Sleeve Cylinder Sleeve for Suzuki RM85 2002-2022 FL5479
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5479, designed for optimal performance and durability. These high-quality replacement sleeves breathe new life into old cylinders, ensuring a perfect fit and enhanced engine efficiency. Upgrade...09310039- SKU:
- 09310039
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE METRIC:
- 48.00 MM
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
$117.95 -
LA Sleeve Cylinder Sleeve for Honda CR250R 2004 H5535
LA SLEEVE
$148.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5535, designed to restore performance and extend the life of your cylinders. Crafted with precision and durability in mind, this quality replacement sleeve ensures optimal fit and function,...09310152- SKU:
- 09310152
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.40 MM
- UNITS:
- EACH
$148.95 -
LA Sleeve Cylinder Sleeve 54mm Bore Honda CR125R 2005-2007 H5579
LA SLEEVE
$127.95Revitalize your engine with the LA SLEEVE H5579 Cylinder Sleeve, designed to restore performance and extend the life of your cylinders. Crafted from high-quality materials, these sleeves offer a perfect fit and exceptional durability, ensuring your...09310153- SKU:
- 09310153
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- UNITS:
- EACH
- BORE SIZE METRIC:
- 54.00 MM
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- AC
$127.95 -
LA Sleeve Cylinder Sleeve 66.40mm Bore Honda CR250R 2005-2007 H5580
LA SLEEVE
$148.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5580, designed for superior performance and durability. These high-quality replacement sleeves are engineered to restore old cylinders, ensuring optimal functionality and longevity. Experience...09310154- SKU:
- 09310154
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.40 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
$148.95 -
LA Sleeve Cylinder Sleeve for 2002-2006 Polaris 600 Models 77.25mm FL1289
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5592, designed for optimal performance and durability. This high-quality replacement sleeve ensures a perfect fit and restores the functionality of your old cylinders, making it an ideal choice...09310159- SKU:
- 09310159
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- BORE SIZE METRIC:
- 85.00 MM
- COLOR/FINISH:
- ALUMINUM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- TYPE:
- AC
$117.95 -
LA Sleeve Cylinder Sleeve for Kawasaki KX100 2006-2013 KA5608
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5608, designed for precision fit and enhanced performance. This high-quality replacement sleeve ensures optimal sealing and durability, giving your old cylinders a fresh start. Engineered for...09310160- SKU:
- 09310160
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- TYPE:
- AC
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 52.50 MM
- COLOR/FINISH:
- CHROME
$117.95 -
LA Sleeve Cylinder Sleeve Yamaha YZ125 2004-2021 YA5533
LA SLEEVE
$127.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve YA5533, designed for exceptional durability and performance. This high-quality replacement sleeve ensures a perfect fit, allowing your old cylinders to perform like new. Engineered with precision,...09310161- SKU:
- 09310161
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE METRIC:
- 54.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- RIDING STYLE:
- OFF-ROAD
$127.95 -
LA Sleeve Cylinder Sleeve 97mm Honda XR600R 1991-2000 H5159
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5159, designed for quality and precision. This replacement sleeve ensures optimal performance and durability, making it an essential component for engine rebuilds. Upgrade your old cylinders...09310318- SKU:
- 09310318
- Availability:
- Ships Same Business Day
- Weight:
- 2.48 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- BORE SIZE METRIC:
- 97.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
$131.95 -
LA SLEEVE Cylinder Sleeve for Honda XR650R 2000-2007 H5440
LA SLEEVE
$131.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5440, designed to restore performance and extend the life of your cylinders. Crafted with precision, this high-quality replacement sleeve ensures a perfect fit and optimal durability, making it...09310319- SKU:
- 09310319
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- COLOR/FINISH:
- CHROME
- BORE SIZE METRIC:
- 100.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
$131.95 -
LA Sleeve Cylinder Sleeve 78mm AC Honda CRF250R 2005-2009 CRF250X 2005-2017 H5597
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5597, designed for exceptional durability and performance. This quality replacement sleeve provides a seamless fit for old cylinders, ensuring they operate like new. Upgrade your engine's...09310262- SKU:
- 09310262
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- BORE SIZE METRIC:
- 78.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
$117.95 -
L.A. Sleeve Cylinder Sleeve for Kawasaki KLX450R 2008-2009 KX450F 2006-2008 KA5607
LA SLEEVE
$127.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5607, designed for high performance and durability. Crafted from premium materials, this replacement sleeve ensures a perfect fit and optimal function, extending the life of your cylinders and...09310263- SKU:
- 09310263
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- BORE SIZE METRIC:
- 96.00 MM
- COLOR/FINISH:
- CHROME
$127.95 -
LA Sleeve Cylinder Sleeve for Kawasaki KX250 2019 KA5611
LA SLEEVE
$104.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve KA5611, designed to enhance performance and extend the lifespan of your cylinders. Crafted from high-quality materials, these sleeves provide a reliable solution for restoring worn-out cylinders,...09310264- SKU:
- 09310264
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE SIZE METRIC:
- 77.00 MM
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
$104.95 -
LA Sleeve Cylinder Sleeve 54mm Bore 2007-2015 KTM 125 SX FL5692
LA SLEEVE
$132.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5692, designed to restore performance and extend the life of your old cylinders. Crafted with precision engineering, these sleeves provide a perfect fit and enhanced durability, ensuring your...09310638- SKU:
- 09310638
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- BORE SIZE METRIC:
- 54.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
$132.95
