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 Stage 2 Exhaust Camshaft for 2001-2012 Yamaha YZ250F 4055-2E
HOT CAMS
$321.95Unleash your engine's potential with the HOT CAMS Exhaust Camshaft 4055-2E, designed for high-performance racing applications. With advanced ITR technology, this camshaft optimizes throttle response...09250087- SKU:
- 09250087
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- RIDING STYLE:
- OFF-ROAD
- EXHAUST DURATION IMPERIAL:
- 252°
- EXHAUST LIFT METRIC:
- 8.50 MM
- UNITS:
- EACH
$321.95Qty in Cart: 0Quantity:Price:$321.95Subtotal: -
Hot Cams Stage 2 Intake Camshaft for Yamaha YZ250F 2001-2012 4054-2IN
HOT CAMS
$335.95Unlock the full potential of your engine with the HOT CAMS Camshaft 4054-2IN, designed for high-performance racing applications. Offering exceptional throttle response and power gains, these...09250088- SKU:
- 09250088
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- INTAKE DURATION IMPERIAL:
- 256°
- INTAKE LIFT METRIC:
- 8.50 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- APPLICATION:
- INTAKE
- UNITS:
- EACH
$335.95Qty in Cart: 0Quantity:Price:$335.95Subtotal: -
Hot Cams Valve Shim Kit for Honda CRF250R 2004-2017 HCSHIM01
HOT CAMS
$127.95The HOT CAMS Cam Shim Kit HCSHIM01 is an essential component for precision engine tuning, designed to optimize valve clearance and enhance performance. Each kit includes high-quality shims that...09250010- SKU:
- 09250010
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- TYPE:
- VALVE
- DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SHIM KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$127.95 -
Hot Cams Cam Shim Kit for Honda CRF450R 2002-2023 HCSHIM02
HOT CAMS
$127.95The HOT CAMS Cam Shim Kit HCSHIM02 is designed for precision and performance, ensuring your engine runs smoothly and efficiently. Ideal for both professional mechanics and DIY enthusiasts, this kit...09250011- SKU:
- 09250011
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- RIDING STYLE:
- OFF-ROAD
- DIAMETER METRIC:
- 9.48 MM
- TYPE:
- VALVE
- PRODUCT NAME:
- SHIM KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$127.95 -
Hot Cams Stage 2 Camshaft for Honda CRF450R 2002-2006 TRX450R 2004-2009 1024-2
HOT CAMS
$400.95Elevate your racing performance with the HOT CAMS Camshaft 1024-2. Designed for enthusiasts seeking enhanced power and responsiveness, these camshafts are engineered to optimize your engine's...09250024- SKU:
- 09250024
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- APPLICATION:
- EXHAUST
- INTAKE LIFT METRIC:
- 10.10 MM
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- EXHAUST DURATION IMPERIAL:
- 270°
- EXHAUST LIFT METRIC:
- 8.80 MM
- INTAKE DURATION IMPERIAL:
- 248°
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$400.95 -
Hot Cams Stage 1 Exhaust Camshaft for Yamaha YZ250F 2001-2013 4020-1E
HOT CAMS
$310.95Unlock the full potential of your engine with the HOT CAMS Exhaust Camshaft 4020-1E. Designed for high-performance racing applications, this camshaft enhances both torque and horsepower, ensuring...09250032- SKU:
- 09250032
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 1
- RIDING STYLE:
- OFF-ROAD
- EXHAUST DURATION IMPERIAL:
- 252°
- EXHAUST LIFT METRIC:
- 8.10 MM
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
$310.95 -
Hot Cams Stage 1 Exhaust Camshaft for 1998-2002 Yamaha WR400F and YZ400F 4035-1E
HOT CAMS
$296.95Unlock the full potential of your engine with the HOT CAMS Exhaust Camshaft 4035-1E, designed for high-performance racing applications. This camshaft enhances throttle response and delivers...09250033- SKU:
- 09250033
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- EXHAUST LIFT METRIC:
- 8.76 MM
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CAM
- APPLICATION:
- EXHAUST
- EXHAUST DURATION IMPERIAL:
- 259°
- UNITS:
- EACH
$296.95 -
Hot Cams Stage 1 Intake Camshaft for Yamaha WR450F 2003-2015 4023-1IN
HOT CAMS
$297.95Elevate your racing performance with the HOT CAMS Camshaft 4023-1IN, engineered for enthusiasts seeking maximum power and responsiveness. This camshaft is designed for seamless integration with stock...09250034- SKU:
- 09250034
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- INTAKE DURATION IMPERIAL:
- 269°
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STAGE 1
- APPLICATION:
- INTAKE
- INTAKE LIFT METRIC:
- 8.90 MM
- UNITS:
- EACH
$297.95 -
Hot Cams Valve Shim 10.0 x 2.40 for 2008-2010 KTM 530 EXC-R 5PK1000240
HOT CAMS
$11.95Enhance your engine's performance with the HOT CAMS Valve Shim 10.0 x 2.40 replacement pack. Designed to refill your Valve Shim Kits, these high-quality shims ensure optimal valve clearance and...09261285- SKU:
- 09261285
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 2.40 MM
- MATERIAL:
- STEEL
$11.95 -
Hot Cams Valve Shim 10.0 x 2.50 for KTM 530 EXC-R 2008-2010 5PK1000250
HOT CAMS
$11.95Enhance your engine's performance with the HOT CAMS Valve Shim 10.0 x 2.50 5 Pack. Designed for precision and durability, these replacement shims ensure optimal valve clearance and improved engine...09261287- SKU:
- 09261287
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 2.50 MM
- TYPE:
- VALVE
$11.95Qty in Cart: 0Quantity:Price:$11.95Subtotal: -
Hot Cams Valve Shim 10.0 x 2.60 for 2008-2010 KTM 530 EXC-R 5PK1000260
HOT CAMS
$11.95Enhance your engine's performance with the HOT CAMS Valve Shim 10.0 x 2.60. This high-quality replacement pack is designed to refill your Valve Shim Kits, ensuring optimal valve clearance and engine...09261289- SKU:
- 09261289
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.60 MM
- RIDING STYLE:
- OFF-ROAD
$11.95 -
Hot Cams Valve Shim 10.0 x 2.65 for 2008-2010 KTM 530 EXC-R 5PK1000265
HOT CAMS
$11.95Enhance your engine's performance with the HOT CAMS Valve Shim 10.0 x 2.65 pack. Designed for precision and durability, these shims are essential for maintaining optimal valve clearance in your...09261290- SKU:
- 09261290
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- TYPE:
- VALVE
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.65 MM
$11.95 -
Hot Cams Valve Shim 10.0 x 2.70 for 2008 KTM 530 EXC-R 5PK1000270
HOT CAMS
$11.95Enhance your engine's performance with the HOT CAMS Valve Shim 10.0 x 2.70, designed for precision and durability. This 5-pack is perfect for refilling your Valve Shim Kits, ensuring optimal valve...09261291- SKU:
- 09261291
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- STEEL
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 2.70 MM
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
$11.95Qty in Cart: 0Quantity:Price:$11.95Subtotal: -
Hot Cams Valve Shim 10.0 x 2.75 KTM 530 EXC-R 2008-2010 5PK1000275
HOT CAMS
$10.95Enhance your engine's performance with the HOT CAMS Valve Shim 10.0 x 2.75. This 5-pack provides essential replacements for your Valve Shim Kits, ensuring optimal valve clearance and engine...09261292- SKU:
- 09261292
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 2.75 MM
- PRODUCT NAME:
- SHIM
- TYPE:
- VALVE
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- UNITS:
- 5 PACK
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
Hot Cams Valve Shim 10.0 x 2.90 for 2008-2010 KTM 530 EXC-R 5PK1000290
HOT CAMS
$10.95Enhance your engine's performance with the HOT CAMS Valve Shim 10.0 x 2.90. This 5-pack of high-quality shims is designed to provide precise adjustments for optimal valve clearance, ensuring your...09261295- SKU:
- 09261295
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.90 MM
- RIDING STYLE:
- OFF-ROAD
$10.95 -
Hot Cams Valve Shim 10.0 x 3.05mm for KTM 690 Enduro R 2009-2010 5PK1000305
HOT CAMS
$11.95Enhance your engine's performance with the HOT CAMS Valve Shim pack, designed specifically for precision tuning and maintenance. Each pack contains five high-quality shims, ensuring you have the...09261298- SKU:
- 09261298
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 3.05 MM
- MATERIAL:
- STEEL
$11.95 -
Hinson Racing Oil Filler Cap KTM 250 SX-F 2007-2015 OC477
HINSON RACING
$19.99The stock plastic oil filler cap on your KTM 250 SX-F is a weak point—it can crack under vibration, leak under pressure, and detract from an otherwise dialed machine. The Hinson Racing Oil Filler Cap...09500619- SKU:
- 09500619
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- CAP
- TYPE:
- OIL FILLER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- POLISHED
$19.99 -
VERTEX Piston Ring 53010005800
VERTEX
$29.95Piston rings are critical wear items that directly impact compression, blow-by control, and oil consumption—neglecting them leads to power loss and engine damage. VERTEX Piston Ring 53010005800...09120173- SKU:
- 09120173
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- PISTON RING
- PISTON DIAMETER METRIC:
- 57.95 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$29.95 -
VERTEX Piston Kit 23641A
VERTEX
$302.95Whether you're rebuilding after high-mileage wear or stepping up to forged internals for increased boost tolerance, the VERTEX Piston Kit 23641A delivers the strength and precision needed to support...09102073- SKU:
- 09102073
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- DISPLACEMENT:
- 350 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- 12.8:1
- CYLINDER DIAMETER METRIC:
- 88.00 MM
- PISTON DIAMETER METRIC:
- 87.96 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
$302.95 -
Wiseco Engine Rebuild Kit for Suzuki RM250 2003-2004 PWR165A-100
WISECO
$732.95A worn or damaged engine in your RM250 doesn't just compromise performance—it threatens reliability when you need it most. The Wiseco Engine Rebuild Kit PWR165A-100 supplies every critical component...09031544- SKU:
- 09031544
- Availability:
- Ships Same Business Day
- Weight:
- 13.65 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 2-STROKE
- BORE SIZE METRIC:
- 66.40 MM
- OVERBORE METRIC:
- STANDARD
- UNITS:
- KIT
- FEATURES:
- PROLITE® PISTON
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- OFF-ROAD
$732.95
