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
-
MOOSE RACING Motor Gasket Kit with Seal - KX125 811420
MOOSE RACING
$62.75Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...M811420- SKU:
- M811420
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$62.75 -
MOOSE RACING Motor Gasket Kit with Seal - KX125 811424
MOOSE RACING
$66.71Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...M811424- SKU:
- M811424
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$66.71 -
MOOSE RACING Top End Gasket Kit - KLX 810460
MOOSE RACING
$34.60Moose 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...09346109- SKU:
- 09346109
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- TOP END
$34.60 -
MOOSE RACING Top End Gasket Kit - YZ450F 810997
MOOSE RACING
$83.24Moose 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...09346110- SKU:
- 09346110
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET
$83.24 -
MOOSE RACING Complete Motor Gasket Kit with Seals - Honda 811248
MOOSE RACING
$86.76Moose 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...09346111- SKU:
- 09346111
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$86.76 -
MOOSE RACING Complete Motor Gasket Kit with Seals - Suzuki 811983
MOOSE RACING
$173.59Moose 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...09346112- SKU:
- 09346112
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$173.59 -
MOOSE RACING Complete Motor Gasket Kit with Seals - Yamaha 811997
MOOSE RACING
$163.88Moose 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...09346113- SKU:
- 09346113
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- ENGINE
$163.88 -
MOOSE RACING Magnetic Drain Plug T14-2081S
MOOSE RACING
$17.95Prolong engine life and save on costly repairs with an oil plug that picks up metal filings, Replaces OEM oil plug exactly, Must use washer provided09200193- SKU:
- 09200193
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- ANODIZED CLEAR
- FEATURES:
- MAGNETIC
- UNITS:
- EACH
- COLOR/FINISH:
- SILVER
- DIAMETER - THREAD SIZE METRIC:
- M10 X 1.5 X 15 MM
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRAIN
$17.95 -
MOOSE RACING Magnetic Drain Plug T14-2082S
MOOSE RACING
$17.95Prolong engine life and save on costly repairs with an oil plug that picks up metal filings, Replaces OEM oil plug exactly, Must use washer provided09200194- SKU:
- 09200194
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- ANODIZED CLEAR
- DIAMETER - THREAD SIZE METRIC:
- M10 X 1.5 X 22 MM
- FEATURES:
- MAGNETIC
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DRAIN
- UNITS:
- EACH
$17.95 -
MOOSE RACING Motor Gasket Kit with Seal - CR125 811235
MOOSE RACING
$75.25Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...M811235- SKU:
- M811235
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$75.25 -
MOOSE RACING Motor Gasket Kit with Seal - CR250 811254
MOOSE RACING
$77.46Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...M811254- SKU:
- M811254
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$77.46 -
MOOSE RACING Motor Gasket Kit with Seal - KX/RM65 811412
MOOSE RACING
$64.25Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...M811412- SKU:
- M811412
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$64.25 -
MOOSE RACING Top End Gasket Kit - CR250R 810257
MOOSE RACING
$31.79Moose 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...M810257- SKU:
- M810257
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$31.79 -
MOOSE RACING Top End Gasket Kit - XL/XR250 810258
MOOSE RACING
$76.19Moose 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...M810258- SKU:
- M810258
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$76.19 -
MOOSE RACING Top End Gasket Kit - CR250R 810259
MOOSE RACING
$39.41Moose 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...M810259- SKU:
- M810259
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$39.41 -
MOOSE RACING Top End Gasket Kit - CR250 810260
MOOSE RACING
$31.79Moose 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...M810260- SKU:
- M810260
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- THICKNESS METRIC:
- 2.50 MM
- THICKNESS IMPERIAL:
- 0,100'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$31.79 -
LA Sleeve Cylinder Sleeve 54mm Bore Suzuki RM125 2004-2007 FL5532
LA SLEEVE
$127.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5532. Designed for superior performance, this high-quality replacement sleeve ensures a perfect fit and exceptional durability, extending the life of your cylinders. Upgrade your machinery with...09310040- SKU:
- 09310040
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- CYLINDER SLEEVE
- BORE SIZE METRIC:
- 54.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
$127.95 -
LA Sleeve Cylinder Sleeve 45mm Bore 2003-2008 KTM 65 SX FL5550
LA SLEEVE
$117.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve FL5550, 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 for...09310042- SKU:
- 09310042
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- BORE SIZE METRIC:
- 45.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
$117.95 -
LA Sleeve Cylinder Sleeve 54mm Bore Honda CR125R 1987-1988 H5001
LA SLEEVE
$137.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve H5001, designed for optimal performance and durability. This high-quality replacement sleeve ensures a precise fit and enhances the longevity of your cylinders, making it an essential upgrade for...09310047- SKU:
- 09310047
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CS
- BORE SIZE METRIC:
- 54.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
$137.95 -
LA Sleeve Cylinder Sleeve for Yamaha YFZ450 2004-2013 YA5495
LA SLEEVE
$127.95Revitalize your engine with the LA SLEEVE Cylinder Sleeve YA5495, designed to restore the performance of worn-out cylinders. Crafted from high-quality materials, this replacement sleeve ensures durability and a perfect fit, making it an essential...09310070- SKU:
- 09310070
- Availability:
- Ships Same Business Day
- Weight:
- 1.59 LBS
- PRODUCT NAME:
- CYLINDER SLEEVE
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- ALUMINUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE SIZE METRIC:
- 95.00 MM
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
$127.95
