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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VERTEX Piston Kit - High Compression VTKTC23236B
VERTEX
$352.95All 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 life09103746- SKU:
- 09103746
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
$352.95 -
VERTEX Piston Kit VTKTC23562B
VERTEX
$335.95All 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 life09103779- SKU:
- 09103779
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
$335.95 -
VERTEX Piston Kit VTKTC23564B
VERTEX
$292.95All 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 life09103785- SKU:
- 09103785
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
$292.95 -
VERTEX Piston Kit 23736B
VERTEX
$290.95All 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 life09102615- SKU:
- 09102615
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- DISPLACEMENT:
- 250 CC
- PISTON DIAMETER METRIC:
- 76.96 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
$290.95 -
VERTEX Piston Kit 23342B
VERTEX
$280.95All 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 life09102626- SKU:
- 09102626
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$280.95 -
VERTEX Piston Kit 23757A
VERTEX
$268.95All 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 life09103178- SKU:
- 09103178
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
$268.95 -
Wiseco 48.50mm Piston Ring Set for Kawasaki KX85 2014-2024 1909CS
WISECO
$24.95Upgrade your engine's performance with the WISECO Ring Set 1909CS, designed for optimal sealing and durability. This replacement ring set ensures a precise fit for your pistons, enhancing efficiency and power output. Crafted with high-quality materials,...1909CS- SKU:
- 1909CS
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- DISPLACEMENT:
- 84,7 CC
- BORE SIZE METRIC:
- 48.50 MM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$24.95 -
Wiseco Wrist Pin for Honda CR125R 1980-1984 Kawasaki KZ550D/H GPZ 1982-1983 Suzuki GSX-R600 2001-2003 S394
WISECO
$22.99Experience unparalleled durability and precision with Wiseco's advanced piston technology. Engineered for superior strength and minimal thermal expansion, these pistons are designed to withstand extreme conditions while maximizing engine performance. ...S394- SKU:
- S394
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- APPLICATION:
- PISTON
- PRODUCT NAME:
- WRIST PIN
- UNITS:
- EACH
- LENGTH:
- 50 MM
- MATERIAL:
- ALUMINUM
- OUTSIDE DIAMETER:
- 14,00 MM
- RIDING STYLE:
- STREET
- OUTSIDE DIAMETER METRIC:
- 14.00 MM
- RIDING STYLE:
- OFF-ROAD
- LENGTH METRIC:
- 50 MM
- MATERIAL:
- SILICONE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$22.99 -
Wiseco Wrist Pin 18mm x 47mm for Polaris 500 Classic 2003 S459
WISECO
$22.99Discover the exceptional engineering behind the Wiseco S459 High-Tech Component, designed for enthusiasts who demand peak performance and reliability. With its innovative design and advanced materials, this component ensures optimal operation even in the...S459- SKU:
- S459
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- LENGTH:
- 60 MM
- OUTSIDE DIAMETER METRIC:
- 18.00 MM
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- WRIST PIN
- RIDING STYLE:
- STREET
- APPLICATION:
- PISTON
- LENGTH METRIC:
- 60 MM
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER:
- 18,00 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$22.99 -
Wiseco Wrist Pin 15mm x 41mm for Honda CR125R 1988-2003 S467
WISECO
$22.99Unlock the full potential of your engine with the Wiseco S467 piston, engineered for peak performance and durability. This advanced piston design ensures optimal efficiency and reliability, making it the perfect choice for automotive enthusiasts seeking...S467- SKU:
- S467
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- LENGTH METRIC:
- 54.5 MM
- OUTSIDE DIAMETER:
- 15,00 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- WRIST PIN
- APPLICATION:
- PISTON
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER METRIC:
- 15.00 MM
- UNITS:
- EACH
- LENGTH:
- 54,5 MM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$22.99 -
Wiseco Wrist Pin 18mm x 52.7mm for KTM 300 EXC 1991-1994 S477
WISECO
$22.99Experience unparalleled performance and durability with the Wiseco S477 component, meticulously crafted using cutting-edge manufacturing techniques. Engineered to thrive in extreme conditions, this component is the perfect upgrade for high-performance...S477- SKU:
- S477
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- LENGTH METRIC:
- 52.7 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- WRIST PIN
- APPLICATION:
- PISTON
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER:
- 18,00 MM
- OUTSIDE DIAMETER METRIC:
- 18.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- LENGTH:
- 52,7 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
$22.99 -
Wiseco Wrist Pin Honda TRX300 FourTrax 1988-2000 S523
WISECO
$23.99Unlock the full potential of your engine with the Wiseco S523, meticulously crafted for those who demand peak performance and reliability. This advanced component is engineered to endure extreme conditions while enhancing overall efficiency, making it...S523- SKU:
- S523
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER:
- 17,00 MM
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- OUTSIDE DIAMETER METRIC:
- 17.00 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- APPLICATION:
- PISTON
- LENGTH:
- 59,50 MM
- LENGTH METRIC:
- 59.50 MM
- PRODUCT NAME:
- WRIST PIN
$23.99 -
Wiseco Piston Kit Honda CRF150F 2006-2017 58mm 10:1 40132M05800
WISECO
$154.95Upgrade your Honda's performance with the WISECO Piston Kit, designed for durability and efficiency. Engineered for precision, this kit ensures optimal compression and power delivery, enhancing your riding experience. Please note that gasket kits are not...09103947- SKU:
- 09103947
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE SIZE METRIC:
- 58.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 58.00 MM
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
$154.95 -
Wiseco Piston Kit Husqvarna FC450 2014-2022 RE805M09500
WISECO
$379.95Unlock exceptional performance with the WISECO Racer Elite Piston Kit, meticulously engineered for optimal power and efficiency. Featuring cutting-edge technology, this piston kit is designed to enhance your engine's performance, ensuring maximum torque...09105061- SKU:
- 09105061
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 95.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
$379.95 -
Wiseco TTR250 1999-2006 74mm Piston Kit 10.5:1 Compression 4689M07400
WISECO
$194.95Engineered for performance and durability, the Wiseco Piston 4689M07400 is crafted from a high-silicon alloy, ensuring exceptional strength for both trail and racing applications. This piston is designed to enhance engine efficiency while maintaining...4689M07400- SKU:
- 4689M07400
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 74.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 249 CC
- PISTON DIAMETER METRIC:
- 73.95 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STROKE LENGTH METRIC:
- 59.60 MM
$194.95 -
Wiseco Piston Kit Honda CRF450R 2017-2025 RE813M09600
WISECO
$379.95Experience unparalleled performance with the WISECO Racer Elite Piston Kit, engineered for maximum power and efficiency. This kit features advanced design elements that enhance durability and optimize engine performance, making it the perfect choice for...09105066- SKU:
- 09105066
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- OFF-ROAD
$379.95Qty in Cart: 0Quantity:Price:$379.95Subtotal: -
Wiseco Piston Kit Racer Elite Suzuki RMZ450 2008-2012 RE814M09600
WISECO
$379.95Unlock exceptional performance with the WISECO Piston Kit Racer Elite, engineered for maximum power and efficiency. This high-compression piston kit is meticulously crafted for superior strength and optimal fit, making it an essential upgrade for serious...09105067- SKU:
- 09105067
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE SIZE METRIC:
- 96.00 MM
$379.95 -
Wiseco Piston Yamaha YZF-R1 1998-2025 0.50mm 451M08550
WISECO
$234.95Engineered for peak performance, the WISECO Piston for Yamaha is crafted from a high-silicon alloy, ensuring exceptional strength and reliability in both racing and trail riding conditions. This piston comes complete with rings and circlips, making it a...451M08550- SKU:
- 451M08550
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- DISPLACEMENT:
- 465 CC
- MODEL:
- FORGED SERIES
- STROKE LENGTH METRIC:
- 82.00 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 85.42 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 85.50 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$234.95 -
Wiseco Piston Kit Husqvarna TC65 2017-2022 RE920M04500
WISECO
$139.95Experience unparalleled performance with the WISECO Racer Elite Piston Kit, designed for serious racers and enthusiasts. Crafted from advanced 2000 Series alloy, this piston kit offers exceptional strength and durability, ensuring optimal performance in...09105100- SKU:
- 09105100
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 2000 SERIES ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- RACER ELITE
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 45.00 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORFIT™
$139.95 -
Wiseco Piston Kit with Gaskets 55mm 2001 Yamaha YZ125 PK1350
WISECO
$209.95Elevate your engine's performance with the WISECO Piston Kit, expertly crafted from high-silicone forged materials for superior strength and thermal stability. This comprehensive kit includes everything you need for a complete rebuild, ensuring your...09030228- SKU:
- 09030228
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 54.95 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 55.00 MM
- DISPLACEMENT:
- 124 CC
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$209.95
