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 Valve Shim 10.00mm x 2.20mm for 2008-2010 KTM 530 EXC-R 5PK1000220
HOT CAMS
$10.95Enhance your engine's performance with the HOT CAMS Valve Shim 10.0 x 2.20, designed for precision and durability. This 5-pack provides a reliable solution for refilling your Valve Shim Kits, ensuring optimal valve clearance and improved engine...09261281- SKU:
- 09261281
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- OUTSIDE DIAMETER METRIC:
- 10.00 MM
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- UNITS:
- 5 PACK
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 2.20 MM
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
Hot Cams Valve Shim 7.48mm x 1.95mm for Honda CRF 250R 2004-2017 5PK748195
HOT CAMS
$10.95Upgrade your engine's performance with the HOT CAMS Valve Shim pack. Designed for precision and durability, these shims are essential for maintaining optimal valve clearance in your engine. Each pack contains five high-quality shims, perfect for...09261317- SKU:
- 09261317
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 1.95 MM
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$10.95 -
Hot Cams Valve Shim 7.48mm x 2.10mm for Honda CRF150R 2007-2016 5PK748210
HOT CAMS
$10.95Enhance your engine's performance with the HOT CAMS Valve Shim 7.48 x 2.10 pack. Designed for precision fitting, these high-quality shims ensure optimal valve clearance and longevity. Perfect for refilling your Valve Shim Kits, they are essential for...09261320- SKU:
- 09261320
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 2.10 MM
- PRODUCT NAME:
- SHIM
- TYPE:
- VALVE
- UNITS:
- 5 PACK
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
Hot Cams Valve Shim 7.48mm x 2.15mm for Honda CRF 150R 2007-2018 5PK748215
HOT CAMS
$10.95Upgrade your engine's performance with the HOT CAMS Valve Shim pack. Designed to refill your Valve Shim Kits, these shims ensure optimal valve clearance and enhance your engine's efficiency. Perfect for enthusiasts looking to maintain peak performance. ...09261321- SKU:
- 09261321
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- VALVE SHIM THICKNESS METRIC:
- 2.15 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 3.30mm for Honda CRF 150R 2007-2018 5PK748330
HOT CAMS
$10.95Enhance your engine's performance with the HOT CAMS Valve Shim 5 Pack. Designed for precision and durability, these shims are perfect for refilling your Valve Shim Kits, ensuring optimal valve clearance and engine efficiency. Get back on the road with...09261344- SKU:
- 09261344
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- VALVE SHIM THICKNESS METRIC:
- 3.30 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
Hot Cams Valve Shim 9.48mm x 3.05mm for Honda CRF450R 2002-2018 5PK948305
HOT CAMS
$10.95Enhance your engine's performance with HOT CAMS Valve Shims. Designed for precision and durability, these shims are perfect for refilling your Valve Shim Kits, ensuring optimal valve clearance and engine efficiency. Dimensions: 9.48 mm x 3.05 mm for...09261409- SKU:
- 09261409
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- VALVE SHIM THICKNESS METRIC:
- 3.05 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- TYPE:
- VALVE
$10.95 -
Hot Cams Valve Shim Kit 9.48mm x 3.50mm for Honda CRF450R 2002-2014 HCSHIM02
HOT CAMS
$9.95Enhance your engine's performance with HOT CAMS Valve Shims, designed for precision and durability. This 5-pack of shims is perfect for refilling your Valve Shim Kits, ensuring optimal valve clearance and engine efficiency. Trust in quality materials to...09261418- SKU:
- 09261418
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 3.50 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
Hot Cams Valve Shim 7.48mm x 2.50mm for Honda CRF 150R 2007-2018 5PK748250
HOT CAMS
$10.95Enhance your engine's performance with the HOT CAMS Valve Shim 7.48 x 2.50 pack. Designed to refill your Valve Shim Kits, these high-quality shims ensure precise valve adjustments for optimal engine efficiency. Durable and reliable, these shims are...09261328- SKU:
- 09261328
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.50 MM
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- STREET
- 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 3.25mm for Honda CRF150R 2007-2019 5PK748325
HOT CAMS
$10.95Enhance your engine's performance with the HOT CAMS Valve Shim pack, designed for precise valve adjustments. This 5-pack ensures you have the right shims on hand for your Valve Shim Kits, allowing for optimal tuning and maintenance of your motorcycle or...09261343- SKU:
- 09261343
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- VALVE SHIM THICKNESS METRIC:
- 3.25 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
$10.95 -
Hot Cams Valve Shim 7.48mm x 3.35mm for Honda CBR600F 2005 5PK748335
HOT CAMS
$10.95Enhance your engine's performance with the HOT CAMS Valve Shim pack, designed specifically for precise valve adjustments. This 5-pack of high-quality shims ensures you have the right tools on hand for optimal engine tuning and maintenance. Size: 7...09261345- SKU:
- 09261345
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 3.35 MM
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
Hot Cams Valve Shim 7.48mm x 3.45mm for Honda CRF150R 2007-2019 5PK748345
HOT CAMS
$10.95Enhance the performance of your valve shim kits with the HOT CAMS Valve Shim Replacement Pack. Designed for precision and durability, these shims ensure optimal engine performance and longevity. This convenient 5-pack provides an essential refill for...09261347- SKU:
- 09261347
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 3.45 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
Hot Cams Valve Shim 9.48mm x 1.35mm for Honda CRF450R 2002-2014 5PK948135
HOT CAMS
$10.95Enhance your engine's performance with the HOT CAMS Valve Shim 9.48 x 1.35, designed for precision and durability. This 5-pack of replacement shims is perfect for refilling your Valve Shim Kits, ensuring optimal valve clearance and engine efficiency. ...09261375- SKU:
- 09261375
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 1.35 MM
$10.95 -
Hinson Racing Ignition Cover Suzuki RM-Z450 2009-2025 IC430
HINSON RACING
$399.99Elevate your RMZ450's performance with the HINSON RACING Ignition Cover, designed to withstand the toughest conditions. Crafted from high-quality T-6 aircraft-grade aluminum, this ignition cover not only enhances durability but also optimizes heat...09401362- SKU:
- 09401362
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- MATERIAL:
- T-6 ALUMINUM
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$399.99Qty in Cart: 0Quantity:Price:$399.99Subtotal: -
On Sale
VERTEX Piston Kit 23119200
VERTEX
MSRP: $177.95Now: $160.16Was: $177.95All pistons are heat treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity cast aluminum alloy (not...09103344- SKU:
- 09103344
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- CYLINDER DIAMETER METRIC:
- 56.00 MM
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 55.95 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +2,00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 135 CC
- STYLE:
- CAST BIG BORE
MSRP: $177.95Now: $160.16Was: $177.95Qty in Cart: 0Quantity:Price:MSRP: $177.95Now: $160.16Was: $177.95Subtotal: -
On Sale
VERTEX Piston Kit with Gaskets VTK22795B
VERTEX
MSRP: $289.95Now: $260.96Was: $289.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Forged High Compression pistons improve power and...09103363- SKU:
- 09103363
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- DISPLACEMENT:
- 250 CC
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- PRODUCT NAME:
- TOP END PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- PISTON DIAMETER METRIC:
- 66.36 MM
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
MSRP: $289.95Now: $260.96Was: $289.95 -
On Sale
VERTEX Piston Kit with Gaskets VTK22520B
VERTEX
MSRP: $208.95Now: $188.06Was: $208.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Forged High Compression pistons improve power and...09103379- SKU:
- 09103379
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- PISTON DIAMETER METRIC:
- 53.94 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- TOP END PISTON KIT
- STYLE:
- CAST REPLICA
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
MSRP: $208.95Now: $188.06Was: $208.95 -
On Sale
VERTEX Piston Kit VTK23004B
VERTEX
MSRP: $223.95Now: $201.56Was: $223.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09103073- SKU:
- 09103073
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- PISTON DIAMETER METRIC:
- 53.96 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- DISPLACEMENT:
- 125 CC
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- TOP END PISTON KIT
MSRP: $223.95Now: $201.56Was: $223.95 -
On Sale
VERTEX Piston Kit VTK23630B
VERTEX
MSRP: $243.95Now: $219.56Was: $243.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09103099- SKU:
- 09103099
- Availability:
- Ships Same Business Day
- Weight:
- 1.24 LBS
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- TOP END PISTON KIT
- RIDING STYLE:
- STREET
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 66.35 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
MSRP: $243.95Now: $219.56Was: $243.95Qty in Cart: 0Quantity:Price:MSRP: $243.95Now: $219.56Was: $243.95Subtotal: -
On Sale
VERTEX Piston Circlips - 4-Stroke 72075K
VERTEX
MSRP: $3.95Now: $3.56Was: $3.95OEM Replacements for Vertex piston kits.09130057- SKU:
- 09130057
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- CIRCLIP
- RIDING STYLE:
- UTV
- APPLICATION:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
- RIDING STYLE:
- ATV
MSRP: $3.95Now: $3.56Was: $3.95 -
On Sale
VERTEX Piston Ring 53010004750
VERTEX
MSRP: $25.95Now: $23.36Was: $25.95Replacement piston rings, Nitride coated or chrome plated, increasing wear resistance and extending durability, The latest generation for both two-stroke and four-stroke engines; four-stroke piston rings are sold in sets and two-stroke piston rings are...09120166- SKU:
- 09120166
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- PISTON RING
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 47.45 MM
MSRP: $25.95Now: $23.36Was: $25.95Qty in Cart: 0Quantity:Price:MSRP: $25.95Now: $23.36Was: $25.95Subtotal:
