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!
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- Qty in Cart
- Quantity
- Price
- Subtotal
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COMETIC Exhaust Gasket - Honda EX690064AM
COMETIC
$4.95Gasket material and construction will vary by application to ensure longevity with leak free performance under all conditions, 4-stroke applications utilize a double-sided Viton® rubber-coated stainless steel gasket providing precise, high-temperature...09344546- SKU:
- 09344546
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- BORE SIZE METRIC:
- 39.00 MM
- RIDING STYLE:
- ATV
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.63 MM
- TYPE:
- EXHAUST
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- THICKNESS IMPERIAL:
- 0,064'
$4.95 -
COMETIC Exhaust Gasket EX817
COMETIC
$13.95Gasket material and construction will vary by application to ensure longevity with leak free performance under all conditions, 4-stroke applications utilize a double-sided Viton® rubber-coated stainless steel gasket providing precise, high-temperature...09344554- SKU:
- 09344554
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- EXHAUST
- UNITS:
- SET
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- BORE SIZE METRIC:
- 90.00 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
$13.95 -
COMETIC Valve Cover Gasket - Honda VC032010S
COMETIC
$39.95Valve cover gaskets are made from application specific materials to ensure longevity and correct fitment for a leak free seal, Provides quality, high-tech sealing solutions at a cost less than the OEMs, Made from AFM or thick fiber material depending on...09344566- SKU:
- 09344566
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE COVER
- MODEL:
- HI-PERFORMANCE
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$39.95 -
COMETIC Bottom End Gasket Set - Gas Gas C3310
COMETIC
$64.95Bottom end gasket kits include correct oil seals, O-rings, drain plug washers and water pump cover gaskets as needed, Materials will vary depending on what is correct and engineered for specified application, Purchase a top and a bottom end gasket kit...09344140- SKU:
- 09344140
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- HI-PERFORMANCE
- UNITS:
- KIT
$64.95 -
COMETIC Stator Gasket - Kawasaki EC1339032AFM
COMETIC
$16.95Stator cover gaskets are made from an AFM Material which is a chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core, Save service time as AFM will not stick to the engine case making replacement quick and easy, no more...09344392- SKU:
- 09344392
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- TYPE:
- STATOR COVER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- UNITS:
- EACH
$16.95 -
Hot Cams Valve Shim 10.0 x 2.25 for 2008-2010 KTM 530 EXC-R 5PK1000225
HOT CAMS
$10.95Upgrade your valve shim kit with the HOT CAMS Valve Shim Replacement Pack. Designed for precision and durability, these shims ensure optimal engine performance and longevity. Perfect for enthusiasts looking to maintain their valve systems effectively. ...09261282- SKU:
- 09261282
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- TYPE:
- VALVE
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 2.25 MM
$10.95 -
Hot Cams Valve Shim 10.0 x 2.30 for 2008-2010 KTM 530 EXC-R 5PK1000230
HOT CAMS
$10.95Upgrade your valve shim kits with the HOT CAMS Valve Shim 10.0 x 2.30. Designed for precision and durability, these replacement shims ensure optimal performance and longevity for your engine. Perfect for mechanics and enthusiasts alike, this pack...09261283- SKU:
- 09261283
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- PRODUCT NAME:
- SHIM
- TYPE:
- VALVE
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.30 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$10.95 -
Hot Cams Valve Shim Kit 7.48mm OD 1.20-3.50mm Honda CRF150R 2007-2022 HCSHIM01
HOT CAMS
$9.95Enhance your engine's performance with the HOT CAMS Valve Shim pack, designed for precision and durability. Each shim measures 7.48 x 1.20 mm, making them ideal for a variety of applications. Perfect for refilling your Valve Shim Kits, these shims ensure...09261302- SKU:
- 09261302
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- UTV
- TYPE:
- VALVE
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 1.20 MM
$9.95 -
Hot Cams Stage 1 Intake Camshaft for Yamaha YZ250F 2001-2013 4012-1IN
HOT CAMS
$310.95Elevate your vehicle's capabilities with our cutting-edge racing camshafts, designed for both Stage 1 and Stage 2 setups. These camshafts provide the perfect blend of torque and horsepower, ensuring an exhilarating driving experience for enthusiasts and...YZ250S1AI- SKU:
- YZ250S1AI
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- INTAKE DURATION IMPERIAL:
- 249°
- INTAKE LIFT METRIC:
- 8.48 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CAMSHAFT
$310.95 -
Hot Cams Stage 1 Intake Camshaft for Yamaha WR 400 F 1998-2000 4002-1IN
HOT CAMS
$272.95Enhance your engine's performance with our premium Stage 1 and Stage 2 racing camshafts. Designed for seamless integration with stock valve springs, these camshafts optimize torque and horsepower, delivering impressive power across various RPM ranges. ...YZ426S1AI- SKU:
- YZ426S1AI
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- CAMSHAFT
- INTAKE LIFT METRIC:
- 8.80 MM
- INTAKE DURATION IMPERIAL:
- 260°
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$272.95 -
Hot Cams Stage 1 Camshaft for Honda XR650R 2000-2007 1009-1
HOT CAMS
$362.95Transform your vehicle's capabilities with our premium racing camshafts, engineered for optimal performance and reliability. Perfect for both amateur racers and seasoned professionals, these camshafts are designed to deliver unmatched acceleration and...XR650S1A- SKU:
- XR650S1A
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- INTAKE DURATION IMPERIAL:
- 254°
- EXHAUST DURATION IMPERIAL:
- 251°
- INTAKE LIFT METRIC:
- 9.26 MM
- TYPE:
- STAGE 1
- APPLICATION:
- EXHAUST
- EXHAUST LIFT METRIC:
- 9.20 MM
- PRODUCT NAME:
- CAMSHAFT
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$362.95 -
Hot Cams Stage 2 Camshaft for 2000-2007 Honda XR650R 1010-2
HOT CAMS
$362.95Enhance your engine's performance with our premium Stage 1 and Stage 2 racing camshafts. Designed for seamless integration with stock valve springs, these camshafts optimize torque and horsepower, delivering impressive power across various RPM ranges. ...XR650S2A- SKU:
- XR650S2A
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- APPLICATION:
- INTAKE
- EXHAUST LIFT METRIC:
- 9.50 MM
- INTAKE LIFT METRIC:
- 9.57 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- INTAKE DURATION IMPERIAL:
- 265°
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- EXHAUST DURATION IMPERIAL:
- 260°
$362.95 -
Hot Cams Exhaust Camshaft for Suzuki RM-Z450 2015-2017 2321-1E
HOT CAMS
$289.95Unlock the full potential of your engine with the HOT CAMS Exhaust Camshaft 2321-1E, designed specifically for high-performance racing applications. This camshaft enhances throttle response and delivers impressive power gains across the entire RPM range,...09251195- SKU:
- 09251195
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- EXHAUST DURATION IMPERIAL:
- 248.35°
- RIDING STYLE:
- OFF-ROAD
- EXHAUST LIFT METRIC:
- 9.70 MM
- TYPE:
- STAGE 1
- PRODUCT NAME:
- CAMSHAFT
$289.95 -
Hot Cams Stage 2 Intake Camshaft for Yamaha YZ250F 2017-2018 4326-2IN
HOT CAMS
$289.95Elevate your racing performance with the HOT CAMS Camshaft 4326-2IN, engineered for enthusiasts seeking precision and power. This high-performance camshaft is available in Stage 1 and Stage 2 options, offering tailored enhancements for torque and peak...09251199- SKU:
- 09251199
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- INTAKE LIFT METRIC:
- 9.91 MM
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- INTAKE DURATION IMPERIAL:
- 256.89°
- RIDING STYLE:
- OFF-ROAD
$289.95 -
Hot Cams Exhaust Camshaft for Yamaha YZ250F 2017-2018 4327-2E
HOT CAMS
$289.95Elevate your engine's performance with the HOT CAMS Exhaust Camshaft 4327-2E, designed for high-performance racing applications. This camshaft optimizes torque delivery and enhances peak horsepower, ensuring a thrilling driving experience. With the...09251200- SKU:
- 09251200
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- EXHAUST LIFT METRIC:
- 9.02 MM
- UNITS:
- EACH
- EXHAUST DURATION IMPERIAL:
- 252.83°
- RIDING STYLE:
- OFF-ROAD
$289.95 -
Hot Cams Camshaft for Honda CRF 450 R 2010-2016 1259-1
HOT CAMS
$415.95Elevate your racing performance with the HOT CAMS Camshaft 1259-1. Designed for enthusiasts seeking optimal power, these high-performance camshafts are engineered for seamless integration with stock valve springs, ensuring reliability and enhanced...09250843- SKU:
- 09250843
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- INTAKE DURATION IMPERIAL:
- 236°
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- EXHAUST LIFT METRIC:
- 8.57 MM
- INTAKE LIFT METRIC:
- 9.58 MM
- TYPE:
- STAGE 1
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- EXHAUST DURATION IMPERIAL:
- 270°
$415.95 -
Hot Cams Stage 2 Camshaft for 2010-2016 Honda CRF450R 1260-2
HOT CAMS
$415.95Elevate your racing performance with the HOT CAMS Camshaft 1260-2, engineered for optimal power delivery and responsiveness. Available in Stage 1 and Stage 2 configurations, these camshafts are designed for seamless integration with stock valve springs,...09250844- SKU:
- 09250844
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- STAGE 2
- EXHAUST LIFT METRIC:
- 9.04 MM
- EXHAUST DURATION IMPERIAL:
- 265°
- INTAKE DURATION IMPERIAL:
- 254°
- INTAKE LIFT METRIC:
- 10.38 MM
$415.95 -
Hot Cams Cam Chain 2004-2016 Kawasaki KX250F HC92RH2010114
HOT CAMS
$50.95Experience enhanced performance with the HOT CAMS Cam Chain HC92RH2010114, designed for superior durability and efficiency. This silent chain features specially heat-treated links that provide exceptional resistance to friction and impact, ensuring a...09250845- SKU:
- 09250845
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BASE FINISH:
- RAW
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- MODEL:
- SILENT
- RIDING STYLE:
- OFF-ROAD
- CHAIN SIZE:
- 92RH2010
- PRODUCT NAME:
- CHAIN
- TYPE:
- CAM
$50.95 -
Hot Cams Stage 2 Camshaft for Honda CRF250R 2010-2015 1265-2
HOT CAMS
$402.95Unlock the full potential of your engine with the HOT CAMS Camshaft 1265-2, 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,...09250846- SKU:
- 09250846
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 LBS
- EXHAUST DURATION IMPERIAL:
- 266°
- INTAKE LIFT METRIC:
- 9.14 MM
- PRODUCT NAME:
- CAMSHAFT
- RIDING STYLE:
- OFF-ROAD
- INTAKE DURATION IMPERIAL:
- 255°
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- EXHAUST LIFT METRIC:
- 8.84 MM
- TYPE:
- STAGE 2
$402.95 -
Hot Cams Stage 2 Intake Camshaft for Suzuki DR-Z400E 2000-2008 2251-2IN
HOT CAMS
$268.95Unlock the full potential of your engine with the HOT CAMS Camshaft 2251-2IN. Engineered for high-performance racing, these camshafts are designed to enhance both torque and horsepower, offering a significant boost in throttle response across the RPM...09250693- SKU:
- 09250693
- Availability:
- Ships Same Business Day
- Weight:
- 0.97 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- INTAKE LIFT METRIC:
- 9.07 MM
- PRODUCT NAME:
- CAMSHAFT
- INTAKE DURATION IMPERIAL:
- 238.5°
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$268.95
