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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Wiseco Piston Kit Kawasaki JS550 1991-1995 75.50mm Bore WK1046
WISECO
$349.95Wiseco High-Performance 2-Cycle Pistons WK1046 Elevate your engine's capabilities with Wiseco's premium 2-cycle pistons. Crafted for exceptional strength and performance, these piston kits are the perfect solution for a complete engine rebuild, ensuring...WK1046- SKU:
- WK1046
- Availability:
- Ships Same Business Day
- Weight:
- 2.19 LBS
- RIDING STYLE:
- WATERCRAFT
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 75.50 MM
- PISTON DIAMETER METRIC:
- 75.40 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 537 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$349.95 -
Wossner Piston Kit 53.94mm Yamaha YZ125 2002-2004 8072DA
WOSSNER
$122.00WOSSNER Piston Kit 8072DA Experience unmatched performance and reliability with the WOSSNER Piston Kit 8072DA, meticulously engineered for 2-stroke engines. Crafted from high-quality materials, this piston kit enhances engine efficiency while minimizing...09104787- SKU:
- 09104787
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 53.94 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 54.00 MM
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$122.00 -
Wossner Piston Kit 54.00mm Yamaha YZ125 2002-2004 8072DB
WOSSNER
$122.00WOSSNER Piston Kit 8072DB Experience unparalleled performance with the WOSSNER Piston Kit 8072DB, engineered specifically for 2-stroke engines. Crafted from high-quality materials, this piston kit enhances efficiency and reduces friction, ensuring a...09104788- SKU:
- 09104788
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +0.01 MM
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 54.01 MM
- PISTON SIZE METRIC:
- 53.95 MM
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- +0,01 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$122.00 -
Rekluse Clutch Cover Sherco 250 SE-R 2018-2025 RMS-0408001
REKLUSE
$189.00REKLUSE Clutch Cover for Sherco 250/300 RMS-0408001 Elevate your riding experience with the REKLUSE Clutch Cover, meticulously crafted for the Sherco 250 and 300 models. This premium component combines cutting-edge design with robust materials, ensuring...09401979- SKU:
- 09401979
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
$189.00 -
Rekluse Clutch Cover Beta 350 RR 2020-2025 RMS-0402028
REKLUSE
$189.00REKLUSE Clutch Cover Beta RMS-0402028 Elevate your riding experience with the REKLUSE Clutch Cover, meticulously crafted for exceptional durability and performance. Designed to withstand the toughest terrains, this cover not only enhances your bike's...09401943- SKU:
- 09401943
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
$189.00 -
Rekluse Clutch Cover GasGas EC 250 2018-2019 RMS-300
REKLUSE
$189.00REKLUSE Clutch Cover for GasGas 250/300 RMS-300 Elevate your riding experience with the REKLUSE Clutch Cover, expertly crafted for the GasGas 250/300 models. Designed for ultimate performance and resilience, this cover withstands the rigors of off-road...09401777- SKU:
- 09401777
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$189.00 -
Rekluse Clutch Cover GasGas EC 200 2000-2011 RMS-302
REKLUSE
$189.00REKLUSE Clutch Cover for GasGas 200/250/300 RMS-302 Elevate your riding experience with the REKLUSE Clutch Cover, meticulously crafted for the GasGas 200, 250, and 300 models. Designed for riders who demand both performance and style, this cover stands...09401778- SKU:
- 09401778
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH
- UNITS:
- EACH
$189.00 -
Rekluse Clutch Cover KTM 65 SX 2009-2025 RMS-387
REKLUSE
$189.00REKLUSE Clutch Cover HQ/KTM65 RMS-387 Elevate your riding experience with the REKLUSE Clutch Cover, meticulously designed for the KTM65. This high-performance component combines robust durability with a sleek aesthetic, ensuring you’re ready for any...09401818- SKU:
- 09401818
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- TYPE:
- CLUTCH
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- COVER
$189.00 -
Rekluse Clutch Cover KTM 125 SX 2016-2022 RMS-390
REKLUSE
$189.00REKLUSE Clutch Cover HQ/KTM125/150 RMS-390 Elevate your riding experience with the REKLUSE Clutch Cover, meticulously crafted for KTM 125/150 and RMS-390 models. This premium component combines exceptional durability with a sleek design, ensuring you’re...09401819- SKU:
- 09401819
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$189.00 -
HifloFiltro Oil Filter for Beta RR 350 4T 2011-2024 HF631
HIFLOFILTRO
$8.08HIFLOFILTRO Oil Filter HF631 Experience top-tier engine protection with the HIFLOFILTRO Oil Filter HF631. Designed for optimal performance, this premium filter ensures that your engine runs smoothly and efficiently, extending its lifespan. Trust in...07120423- SKU:
- 07120423
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- BASE COLOR:
- YELLOW
- STYLE:
- PREMIUM
- LENGTH METRIC:
- 120 MM
- PRODUCT NAME:
- OIL FILTER
- WIDTH METRIC:
- 29 MM
- COLOR/FINISH:
- YELLOW
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
$8.08 -
Hiflofiltro Oil Filter for Yamaha WaveRunner FX HO 2009-2016 HF740
HIFLOFILTRO
$9.13HIFLOFILTRO Oil Filter HF740 Experience superior engine protection with the HIFLOFILTRO Oil Filter HF740. This premium oil filter is designed to deliver optimal filtration and enhance the performance of your vehicle. Built with high-quality materials, it...07120476- SKU:
- 07120476
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- PRODUCT NAME:
- OIL FILTER
- TYPE:
- SPIN-ON
- LENGTH METRIC:
- 80 MM
- BASE COLOR:
- BLACK
- RIDING STYLE:
- WATERCRAFT
- STYLE:
- PREMIUM
- WIDTH METRIC:
- 74 MM
$9.13 -
Hiflofiltro Oil Filter for BMW G450X 2009-2010 Husqvarna TC449 2011-2012 TE449 2011-2012 TE511 2011-2013 Sherco 450 Enduro/SM 2004-2007 HF611
HIFLOFILTRO
$5.45HIFLOFILTRO Oil Filter HF611 Experience superior engine performance with the HIFLOFILTRO Oil Filter HF611, designed to provide maximum filtration efficiency and protect your engine from harmful contaminants. Crafted with high-quality materials, this...07120214- SKU:
- 07120214
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- COLOR/FINISH:
- YELLOW
- LENGTH METRIC:
- 87 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- WIDTH METRIC:
- 41 MM
- PRODUCT NAME:
- OIL FILTER
- BASE COLOR:
- YELLOW
- STYLE:
- PREMIUM
$5.45 -
Hiflofiltro Oil Filter for Husqvarna FC250 2014-2020 HF652
HIFLOFILTRO
$6.45HIFLOFILTRO Oil Filter HF652 Experience superior engine performance with the HIFLOFILTRO Oil Filter HF652. Designed for maximum filtration efficiency, this premium oil filter ensures your engine runs smoothly and lasts longer. Trust in high-quality...07120215- SKU:
- 07120215
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- BASE COLOR:
- RED
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- STYLE:
- PREMIUM
- COLOR/FINISH:
- RED
- LENGTH METRIC:
- 87 MM
- UNITS:
- EACH
- WIDTH METRIC:
- 33 MM
$6.45 -
HifloFiltro Oil Filter for Honda CRF150R 2007-2025 HF116
HIFLOFILTRO
$4.34HIFLOFILTRO Oil Filter HF116 Experience superior engine performance with the HIFLOFILTRO Oil Filter HF116, designed for optimal filtration and durability. This premium oil filter ensures that your engine runs smoothly by effectively trapping contaminants...07120034- SKU:
- 07120034
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- RED
- STYLE:
- PREMIUM
- COLOR/FINISH:
- RED
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- WIDTH METRIC:
- 38 MM
- LENGTH METRIC:
- 36 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$4.34 -
Hiflofiltro Oil Filter for KTM 250 SX-F 2005-2012 HF655
HIFLOFILTRO
$6.71HIFLOFILTRO Oil Filter HF655 Experience superior engine protection with the HIFLOFILTRO Oil Filter HF655. Designed for high performance, this premium oil filter ensures optimal filtration and longevity, keeping your engine running smoothly. Trust in a...07120098- SKU:
- 07120098
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE COLOR:
- YELLOW
- STYLE:
- PREMIUM
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- WIDTH METRIC:
- 41 MM
- COLOR/FINISH:
- YELLOW
- LENGTH METRIC:
- 69 MM
$6.71 -
Hiflofiltro Oil Filter for Polaris 800 Sportsman 2005 HF198
HIFLOFILTRO
$9.37HIFLOFILTRO Oil Filter HF198 Experience superior engine protection with the HIFLOFILTRO Oil Filter HF198, designed to meet the highest quality standards. This premium oil filter ensures optimal filtration and performance, extending the life of your...07120549- SKU:
- 07120549
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- RIDING STYLE:
- ATV
- WIDTH METRIC:
- 65 MM
- BASE COLOR:
- BLACK
- LENGTH METRIC:
- 95 MM
- STYLE:
- PREMIUM
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- OIL FILTER
- TYPE:
- SPIN-ON
$9.37 -
HifloFiltro Oil Filter for Husqvarna 701 Enduro 2016-2022 HF651
HIFLOFILTRO
$6.11HIFLOFILTRO Oil Filter HF651 Experience superior engine protection with the HIFLOFILTRO Oil Filter HF651, engineered for optimal performance and reliability. This premium oil filter ensures that your engine runs smoothly by effectively trapping...07120445- SKU:
- 07120445
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- COLOR/FINISH:
- RED
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
- WIDTH METRIC:
- 41.5 MM
- RIDING STYLE:
- OFF-ROAD
- LENGTH METRIC:
- 53 MM
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- BASE COLOR:
- RED
- STYLE:
- PREMIUM
$6.11 -
On Sale
VERTEX Piston Kit 23924B
VERTEX
MSRP: $279.95Now: $179.00Was: $279.95VERTEX Piston Kit 23924BAll 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 life09103331- SKU:
- 09103331
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +3.00 MM
- CYLINDER DIAMETER METRIC:
- 99.00 MM
- DISPLACEMENT:
- 480 CC
- PISTON DIAMETER METRIC:
- 98.97 MM
- STYLE:
- FORGED BIG BORE
- BORE - OVERSIZE:
- +3,00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.6:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
MSRP: $279.95Now: $179.00Was: $279.95 -
VERTEX Piston Kit 23867A
VERTEX
$303.95VERTEX Piston Kit 23867AAll 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...09103334- SKU:
- 09103334
- Availability:
- Ships Same Business Day
- Weight:
- 0.62 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- CYLINDER DIAMETER METRIC:
- 81.00 MM
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- BORE - OVERSIZE:
- +3,00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE - OVERSIZE METRIC:
- +3.00 MM
- DISPLACEMENT:
- 270 CC
- PISTON DIAMETER METRIC:
- 80.96 MM
- RIDING STYLE:
- STREET
- STYLE:
- FORGED BIG BORE
$303.95 -
VERTEX Piston Kit 23867B
VERTEX
$268.95VERTEX Piston Kit 23867BAll 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...09103335- SKU:
- 09103335
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +3,00 MM
- CYLINDER DIAMETER METRIC:
- 81.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +3.00 MM
- DISPLACEMENT:
- 270 CC
- PISTON DIAMETER METRIC:
- 80.97 MM
- STYLE:
- FORGED BIG BORE
$268.95
