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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Hot Cams Camshaft 4280-2IN
HOT CAMS
$289.95Elevate your racing performance with the HOT CAMS 4280-2IN camshaft, engineered for enthusiasts seeking optimal power and responsiveness. This high-performance camshaft is available in Stage 1 and Stage 2 options, tailored to enhance torque or peak...09250884- SKU:
- 09250884
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- INTAKE DURATION IMPERIAL:
- 269.3°
- UNITS:
- EACH
- INTAKE LIFT METRIC:
- 10.03 MM
$289.95Qty in Cart: 0Quantity:Price:$289.95Subtotal: -
Hot Cams Cam Chain for 1996-2017 Kawasaki KLR650 HC92RH2015174
HOT CAMS
$88.95Upgrade your engine's performance with the HOT CAMS Cam Chain HC92RH2015174. Designed for durability and precision, this silent chain features heat-treated links that enhance friction and impact resistance, ensuring a longer lifespan and reliable...09250984- SKU:
- 09250984
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- MODEL:
- SILENT
- PRODUCT NAME:
- CHAIN
- TYPE:
- CAM
- BASE FINISH:
- RAW
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- CHAIN SIZE:
- 92RH2015
- MATERIAL:
- STEEL
$88.95Qty in Cart: 0Quantity:Price:$88.95Subtotal: -
Hot Cams Valve Shim 10.0mm x 2.45mm for KTM 690 Enduro R 2009-2010 5PK1000245
HOT CAMS
$11.95Enhance your engine's performance with the HOT CAMS Valve Shim 10.0 x 2.45. This pack includes five high-quality shims, designed to ensure optimal valve clearance and precision adjustments for your valve shim kits. Perfect for mechanics and enthusiasts...09261286- SKU:
- 09261286
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.45 MM
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- TYPE:
- VALVE
- MATERIAL:
- STEEL
$11.95 -
On Sale
Wiseco Piston Kit 48.5mm for 1979-1984 Honda XR80 PK1278
WISECO
MSRP: $179.95Now: $153.00Was: $179.95Upgrade your engine's performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. This complete kit includes everything you need for a high-performance rebuild, ensuring enhanced strength and durability under extreme conditions. ...09030230- SKU:
- 09030230
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON DIAMETER METRIC:
- 48.47 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- DISPLACEMENT:
- 79.7 CC
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 48.50 MM
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.00 MM
MSRP: $179.95Now: $153.00Was: $179.95Qty in Cart: 0Quantity:Price:MSRP: $179.95Now: $153.00Was: $179.95Subtotal: -
On Sale
Wiseco Honda XR200 1980-1983 Piston Kit with Gaskets PK1116
WISECO
MSRP: $204.95Now: $174.00Was: $204.95Experience unmatched performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. Crafted from high-silicone forged materials, this kit ensures superior strength and minimal thermal expansion, making it ideal for high-temperature...09030231- SKU:
- 09030231
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE SIZE METRIC:
- 65.50 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 192 CC
- PISTON DIAMETER METRIC:
- 65.45 MM
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 57.80 MM
MSRP: $204.95Now: $174.00Was: $204.95Qty in Cart: 0Quantity:Price:MSRP: $204.95Now: $174.00Was: $204.95Subtotal: -
On Sale
Wiseco Engine Rebuild Kit Suzuki RM250 2005-2010 PWR165B-100
WISECO
MSRP: $664.95Now: $565.00Was: $664.95Revitalize your RM250 with the WISECO Engine Kit, designed for a comprehensive top and bottom-end rebuild. This all-inclusive kit ensures your engine performs at its peak, featuring a meticulously crafted crankshaft and rod assembly for exceptional...09031545- SKU:
- 09031545
- Availability:
- Ships Same Business Day
- Weight:
- 13.95 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.40 MM
- UNITS:
- KIT
- DISPLACEMENT:
- 250 CC
- FEATURES:
- PROLITE® PISTON
- OVERBORE METRIC:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
MSRP: $664.95Now: $565.00Was: $664.95 -
BOYESEN Impeller Pump YZ125 WPI-31
BOYESEN
$79.95High-Performance Water Pump WPI31 Enhances water flow for optimal cooling efficiency. Reduces hydraulic friction, ensuring a stable temperature. Minimizes horsepower loss during late-stage racing. Designed to extend engine life with...WPI31- SKU:
- WPI31
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MODEL:
- SUPERCOOLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- PRODUCT NAME:
- IMPELLER
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal: -
BOYESEN Impeller/Waterpump Cover - Magnesium WPK-17M
BOYESEN
$229.95An aluminum investment-cast water pump cover and impeller combo; specifically designed to enhance the performance of your engines cooling system, This high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolant, By increasing...09400247- SKU:
- 09400247
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- MATERIAL:
- ALUMINUM
- TYPE:
- WATER PUMP
- BASE FINISH:
- POWDER-COATED
- COLOR/FINISH:
- MAGNESIUM
- UNITS:
- KIT
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPERCOOLER
- PRODUCT NAME:
- COVER AND IMPELLER KIT
- RIDING STYLE:
- OFF-ROAD
$229.95Qty in Cart: 0Quantity:Price:$229.95Subtotal: -
On Sale
HOT RODS Top End Bearing WB107
HOT RODS
MSRP: $21.95Now: $19.76Was: $21.95Top-quality needle-cage bearing for the piston end of the rod09240568- SKU:
- 09240568
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- WRIST PIN
- UNITS:
- EACH
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
MSRP: $21.95Now: $19.76Was: $21.95 -
On Sale
HOT RODS Top End Bearing WB108
HOT RODS
MSRP: $21.95Now: $19.76Was: $21.95Top-quality needle-cage bearing for the piston end of the rod09240569- SKU:
- 09240569
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- BEARING
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WRIST PIN
- UNITS:
- EACH
MSRP: $21.95Now: $19.76Was: $21.95 -
On Sale
HOT RODS Top End Bearing WB120
HOT RODS
MSRP: $22.95Now: $20.66Was: $22.95Top-quality needle-cage bearing for the piston end of the rod09240574- SKU:
- 09240574
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- CONNECTING ROD
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WRIST PIN
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING
MSRP: $22.95Now: $20.66Was: $22.95 -
On Sale
HOT RODS Crank Bearings K005
HOT RODS
MSRP: $118.95Now: $107.06Was: $118.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240025- SKU:
- 09240025
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- RIDING STYLE:
- STREET
MSRP: $118.95Now: $107.06Was: $118.95 -
On Sale
HOT RODS Crank Bearings K008
HOT RODS
MSRP: $65.95Now: $59.36Was: $65.95Precision, high-quality main bearing and seal kits complement installation of Hot Rods crankshaft assemblies09240030- SKU:
- 09240030
- Availability:
- Ships Same Business Day
- Weight:
- 0.67 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $65.95Now: $59.36Was: $65.95Qty in Cart: 0Quantity:Price:MSRP: $65.95Now: $59.36Was: $65.95Subtotal: -
On Sale
COMETIC Top End Gasket Set - Gas Gas C3261
COMETIC
MSRP: $56.95Now: $54.00Was: $56.95Top end gasket kits include correct base, head gasket and cylinder O-rings as well as other top end specific O-rings or seals needed for R&R of top end, MLS head gaskets promote an even torque load across the gasket sealing surface, providing less bore...09344128- SKU:
- 09344128
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $56.95Now: $54.00Was: $56.95 -
Hot Cams Cam Chain for Kawasaki KX450F 2006-2008 and KLX450R 2008-2009 HC98XRH2010124
HOT CAMS
$62.95Experience unparalleled performance with the HOT CAMS Cam Chain HC98XRH2010124. Designed with exclusive heat-treated links, this silent chain offers superior friction and impact resistance, ensuring a smooth and reliable operation. Engineered to exceed...09250765- SKU:
- 09250765
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- MODEL:
- SILENT
- RIDING STYLE:
- STREET
- BASE FINISH:
- RAW
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CAM
- CHAIN SIZE:
- 98XRH2010
- PRODUCT NAME:
- CHAIN
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- UNITS:
- EACH
$62.95Qty in Cart: 0Quantity:Price:$62.95Subtotal: -
Hot Cams Cam Chain for Husqvarna FC450 2016-2018 and KTM 450 SX-F 2016-2018 HC92RH2015108
HOT CAMS
$77.95Experience superior performance with the HOT CAMS Cam Chain HC92RH2015108, designed for optimal durability and efficiency. Crafted with exclusive heat-treated links, this silent chain ensures minimal friction and exceptional impact resistance, making it...09250822- SKU:
- 09250822
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BASE FINISH:
- RAW
- CHAIN SIZE:
- 92RH2015
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CHAIN
- MODEL:
- SILENT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CAM
- COLOR/FINISH:
- RAW
- MATERIAL:
- STEEL
- UNITS:
- EACH
$77.95 -
Hot Cams Stage 1 Intake Camshaft for 2010-2018 Suzuki RM-Z250 2200-1IN
HOT CAMS
$264.95Elevate your engine's performance with the HOT CAMS 2200-1IN Camshaft, engineered for high-performance racing applications. Available in Stage 1 and Stage 2 options, these camshafts are designed for seamless installation with stock valve springs,...09250656- SKU:
- 09250656
- Availability:
- Ships Same Business Day
- Weight:
- 0.87 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CAMSHAFT
- INTAKE LIFT METRIC:
- 9.40 MM
- UNITS:
- EACH
- INTAKE DURATION IMPERIAL:
- 237°
$264.95Qty in Cart: 0Quantity:Price:$264.95Subtotal: -
Hot Cams Exhaust Camshaft for Suzuki RM-Z250 2010-2018 2201-1E
HOT CAMS
$289.95Elevate your engine's performance with the HOT CAMS Exhaust Camshaft 2201-1E, designed for high-performance racing applications. This camshaft optimizes torque and horsepower, ensuring your vehicle delivers exceptional power across all RPM ranges while...09250657- SKU:
- 09250657
- Availability:
- Ships Same Business Day
- Weight:
- 1.04 LBS
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 1
- EXHAUST DURATION IMPERIAL:
- 239°
- UNITS:
- EACH
- EXHAUST LIFT METRIC:
- 8.38 MM
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
$289.95Qty in Cart: 0Quantity:Price:$289.95Subtotal: -
Hot Cams Stage 2 Intake Camshaft for Suzuki RM-Z250 2010-2018 2203-2IN
HOT CAMS
$264.95Upgrade your engine's performance with the HOT CAMS Camshaft 2203-2IN, engineered for high-performance racing. Designed for enthusiasts seeking optimal torque and horsepower, these camshafts are compatible with stock valve springs, making installation...09250659- SKU:
- 09250659
- Availability:
- Ships Same Business Day
- Weight:
- 0.83 LBS
- INTAKE DURATION IMPERIAL:
- 256°
- INTAKE LIFT METRIC:
- 9.40 MM
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- UNITS:
- EACH
$264.95Qty in Cart: 0Quantity:Price:$264.95Subtotal: -
Hot Cams Exhaust Camshaft Stage 2 for Suzuki RM-Z 250 2010-2018 2204-2E
HOT CAMS
$297.95Elevate your racing performance with the HOT CAMS Exhaust Camshaft 2204-2E, designed for enthusiasts seeking optimal power and torque. This high-performance camshaft enhances throttle response and delivers impressive gains across the RPM spectrum, making...09250660- SKU:
- 09250660
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
- EXHAUST DURATION IMPERIAL:
- 244°
- EXHAUST LIFT METRIC:
- 8.89 MM
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$297.95Qty in Cart: 0Quantity:Price:$297.95Subtotal:
