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
-
Hot Cams Valve Shim 8.90mm x 2.16mm for KTM 250 SX-F 2005-2011 5PK890216
HOT CAMS
$11.95Maintaining correct valve clearance is critical to engine performance, reliability, and longevity—especially on high-revving 4-stroke engines like the KTM 250 SX-F. Hot Cams Valve Shims are precision-engineered to tight tolerances, ensuring your valve...09261360- SKU:
- 09261360
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- OUTSIDE DIAMETER METRIC:
- 8.90 MM
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 2.16 MM
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
$11.95 -
Hot Cams Valve Shim 8.90mm x 2.04mm for KTM 250 SX-F 2005-2011 5PK890204
HOT CAMS
$11.95Valve clearance directly impacts combustion efficiency, fuel economy, and engine longevity—and shims are the precision tool that keeps yours dialed in. These Hot Cams replacement shims are CNC-engineered to OEM tolerances, ensuring accurate clearance...09261357- SKU:
- 09261357
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- OUTSIDE DIAMETER METRIC:
- 8.90 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- UNITS:
- 5 PACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- VALVE SHIM THICKNESS METRIC:
- 2.04 MM
$11.95 -
Hot Cams Valve Shim 7.48mm x 3.10mm for Honda CRF250R 2004-2017 5PK748315
HOT CAMS
$10.95Valve clearance drift is one of the quickest ways to lose horsepower and risk catastrophic engine damage on your CRF250R. Hot Cams valve shims give you precision control over your intake and exhaust valve geometry, ensuring optimal combustion chamber...09261341- SKU:
- 09261341
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 3.15 MM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
$10.95 -
Hot Cams Valve Shim 7.48mm x 3.10mm for Honda CRF250R 2004-2017 5PK748310
HOT CAMS
$10.95Valve clearance drift is inevitable—whether you're logging track hours or maintaining your CRF250R between seasons. Hot Cams valve shims let you dial in precise clearances without replacing entire shim kits, keeping your Honda running at peak efficiency...09261340- SKU:
- 09261340
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 3.10 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$10.95 -
Hot Cams Valve Shim 7.48mm x 3.05mm for Honda CRF150R 2007-2016 5PK748305
HOT CAMS
$10.95Valve clearance directly impacts engine efficiency, fuel economy, and component longevity—and shims are the precise way to dial it in. Hot Cams shims are engineered to tight tolerances, ensuring your CRF150R maintains the exact clearance specifications...09261339- SKU:
- 09261339
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- VALVE SHIM THICKNESS METRIC:
- 3.05 MM
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
$10.95 -
Hot Cams Valve Shim Kit 7.48mm x 3.00mm for Honda CRF150R 2007-2018 HCSHIM01
HOT CAMS
$10.95Valve clearance directly impacts combustion efficiency, power delivery, and engine longevity—and this Hot Cams shim kit gives you precise control over that critical tolerance. Whether you're dialing in a stock rebuild or optimizing a modified head, these...09261338- SKU:
- 09261338
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 3.00 MM
$10.95 -
Hot Cams Valve Shim 7.48mm x 2.85mm for Honda CRF150R 2007-2016 5PK748285
HOT CAMS
$10.95Valve shim clearance directly impacts camshaft timing and engine efficiency—improper shim thickness leads to valve float, poor compression, and accelerated wear. The Hot Cams 7.48mm x 2.85mm shim pack gives you the precision adjustment needed to dial in...09261335- SKU:
- 09261335
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- VALVE SHIM THICKNESS METRIC:
- 2.85 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$10.95 -
Hot Cams Valve Shim 7.48mm x 2.80mm for Honda CRF 250R 2004-2017 5PK748280
HOT CAMS
$10.95Valve clearance directly affects combustion efficiency, fuel economy, and engine longevity—and even small deviations can cause performance loss or mechanical damage. Hot Cams Valve Shims let you fine-tune clearance precisely without replacing entire...09261334- SKU:
- 09261334
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.80 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
$10.95 -
Hot Cams Valve Shim 7.48mm x 2.70mm for Honda CRF150R 2007-2022 5PK748270
HOT CAMS
$10.95Valve clearance directly impacts engine efficiency, combustion timing, and overall reliability—and even slight deviations can compromise performance. Hot Cams valve shims are precision-engineered to restore exact clearance specifications on your CRF150R,...09261332- SKU:
- 09261332
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 2.70 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
$10.95 -
Hot Cams Valve Shim 7.48mm x 2.60mm for Honda CRF150R 2007-2022 5PK748260
HOT CAMS
$10.95Valve clearance directly impacts engine efficiency, combustion timing, and overall performance—especially critical on high-revving four-strokes like the CRF150R. Hot Cams shims deliver precision sizing to maintain tight tolerances through extended riding...09261330- SKU:
- 09261330
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 2.60 MM
- RIDING STYLE:
- UTV
- TYPE:
- VALVE
- RIDING STYLE:
- ATV
$10.95 -
Hot Cams Valve Shim 7.48mm x 2.55mm for Honda 5PK748255
HOT CAMS
$10.95Valve lash directly impacts engine efficiency, combustion timing, and component longevity—and worn or incorrect shims compromise all three. The Hot Cams 7.48 x 2.55mm valve shims deliver precision-engineered replacements that restore proper valve...09261329- SKU:
- 09261329
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.55 MM
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
$10.95 -
Hot Cams Valve Shim 7.48mm x 1.90mm for Honda CRF 250R 2004-2017 5PK748190
HOT CAMS
$10.95Valve shim wear directly impacts combustion efficiency and engine longevity—maintaining precise clearances is non-negotiable for consistent performance. The HOT CAMS 7.48mm x 1.90mm shim pack gives you five precision-engineered replacements, eliminating...09261316- SKU:
- 09261316
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 1.90 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$10.95 -
Hot Cams Valve Shim 7.48mm x 1.85mm for Honda CRF150R 2007-2025 5PK748185
HOT CAMS
$10.95Valve clearance directly impacts combustion efficiency, fuel economy, and engine longevity—and worn or incorrect shims rob your CRF150R of all three. This 5-pack of HOT CAMS valve shims gives you the precision components needed to dial in proper...09261315- SKU:
- 09261315
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 1.85 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$10.95 -
Hot Cams Valve Shim 7.48mm x 1.80mm for Honda CRF150R 2007-2022 5PK748180
HOT CAMS
$10.95Valve clearance directly impacts combustion efficiency, fuel economy, and engine longevity—even small deviations can lead to performance loss or costly damage. The Hot Cams Valve Shim 7.48mm x 1.80mm maintains precise clearance specifications on your...09261314- SKU:
- 09261314
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- VALVE
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 1.80 MM
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- OFF-ROAD
$10.95 -
Hot Cams Valve Shim 7.48mm 1.75mm Thickness 5-Pack 5PK748175
HOT CAMS
$10.95Valve clearance directly impacts combustion efficiency, fuel economy, and engine longevity. Over time, valve shims wear and compress, causing improper clearance that leads to poor sealing, reduced power output, and potential valve damage. The HOT CAMS...09261313- SKU:
- 09261313
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 1.75 MM
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
$10.95 -
Hot Cams Valve Shim 7.48mm x 1.70mm for Honda CRF 150R 2007-2018 5PK748170
HOT CAMS
$10.95Maintaining proper valve clearance is critical to your CRF 150R's engine longevity and performance—and worn or incorrect shims will cost you reliability. This 5-pack gives you the precision replacements needed to dial in exact clearances and keep your...09261312- SKU:
- 09261312
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 1.70 MM
- PRODUCT NAME:
- SHIM
- TYPE:
- VALVE
- UNITS:
- 5 PACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$10.95 -
Hot Cams Valve Shim 7.48mm x 1.65mm for Honda CRF 150R 2007-2018 5PK748165
HOT CAMS
$10.95Valve clearance directly impacts engine performance, compression, and longevity—and worn or incorrect shims compromise all three. These Hot Cams valve shims maintain precise clearance specifications to keep your CRF 150R running at peak efficiency and...09261311- SKU:
- 09261311
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- SHIM
- TYPE:
- VALVE
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 1.65 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$10.95 -
Hot Cams Valve Shim 7.48mm x 1.60mm for Honda CRF150R 2007-2018 5PK748160
HOT CAMS
$10.95Proper valve clearance is critical to engine longevity and performance—too tight and you risk valve float and bent pushrods; too loose and you'll have excessive valve train noise and lost compression. Hot Cams Valve Shims give you the precision...09261310- SKU:
- 09261310
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 1.60 MM
$10.95 -
Hot Cams Valve Shim 7.48mm x 1.55mm for Honda CRF150R 2007-2022 5PK748155
HOT CAMS
$10.95Valve clearance drift is one of the easiest maintenance items to overlook—and one of the most costly when ignored. These Hot Cams valve shims maintain precise clearances between your rocker arms and valve stems, ensuring consistent combustion efficiency...09261309- SKU:
- 09261309
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- VALVE SHIM THICKNESS METRIC:
- 1.55 MM
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SHIM
- TYPE:
- VALVE
- UNITS:
- 5 PACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$10.95 -
Hot Cams Valve Shim 7.48mm x 1.50mm for Honda CRF150R 2007-2022 5PK748150
HOT CAMS
$10.95Valve clearance directly impacts combustion efficiency, engine longevity, and power output—and this Hot Cams shim pack gives you the precision tools to dial in your CRF150R's valve train exactly. Whether you're maintaining stock specs or chasing...09261308- SKU:
- 09261308
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 1.50 MM
- TYPE:
- VALVE
$10.95
