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
-
Wiseco Piston Kit 1.50mm Oversize Yamaha IT400 1977-1978 394M08650
WISECO
$224.95Engineered for performance and durability, the Wiseco 394M08650 piston is crafted from high-silicon alloy, ensuring maximum strength for both racing and trail applications. This piston is designed to enhance engine efficiency and longevity, making it an...394M08650- SKU:
- 394M08650
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- DISPLACEMENT:
- 397 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE SIZE METRIC:
- 86.50 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 86.42 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 70.00 MM
- BORE - OVERSIZE:
- +1,50 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$224.95 -
Wiseco Piston Kit 96mm 13:1 Compression for Suzuki RM-Z450 2013-2023 40110M09600
WISECO
$269.95The WISECO Piston Kit 40110M09600 is engineered for high performance and durability, making it an ideal choice for enthusiasts looking to enhance their engine's efficiency. This kit does not include a gasket set, allowing for tailored installation based...09103928- SKU:
- 09103928
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- STROKE LENGTH METRIC:
- 62.10 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
$269.95 -
Wiseco Honda XR650R 2000-2007 100mm 10:1 Piston Kit 4715M10000
WISECO
$239.95Experience unparalleled performance with the WISECO Piston 4715M10000, expertly crafted from high-silicon alloy to ensure exceptional strength and reliability. Designed for both trail and racing enthusiasts, this piston is a perfect fit for a variety of...4715M10000- SKU:
- 4715M10000
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 100.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 82.60 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 644 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PISTON DIAMETER METRIC:
- 99.95 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
$239.95 -
Wiseco Piston Kit Kawasaki KX450F 2015 96.03mm 12.8:1 40125M09603
WISECO
$239.95Elevate your Kawasaki's performance with the WISECO Piston Kit, designed for precision and durability. This high-quality piston kit enhances engine efficiency and power while ensuring a perfect fit for your motorcycle. Please note that this kit does not...09103942- SKU:
- 09103942
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 62.30 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 451 CC
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
$239.95 -
Wossner Piston Kit 53.97mm Kawasaki KX125 2003 8073DC
WOSSNER
$117.95Experience unparalleled performance with the WOSSNER Piston Kit 8073DC, designed specifically for 2-stroke engines. Crafted from premium materials, this piston kit enhances engine efficiency while minimizing friction and noise. Engineered in Germany,...09105505- SKU:
- 09105505
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 54.02 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- +0,02 MM
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 53.97 MM
$117.95 -
Wossner Piston Kit Honda CR250R 1986-1996 66.94mm 8021D060
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8021D060, designed specifically for 2-stroke engines. This premium piston kit combines advanced engineering with high-quality materials to enhance your engine's efficiency and reliability,...09104726- SKU:
- 09104726
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 66.94 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.60 MM
- DISPLACEMENT:
- 249 CC
- TYPE:
- DUAL RING
- BORE SIZE METRIC:
- 67.00 MM
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,60 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$152.00 -
Wossner Piston Kit 66.94mm for Suzuki RM250 1989-1995 RMX250 1989-1998 8022DA
WOSSNER
$152.00Experience unparalleled performance with the WOSSNER Piston Kit 8022DA, designed specifically for 2-stroke engines. This premium kit combines advanced engineering and high-quality materials to enhance your engine's efficiency and longevity, ensuring a...09104731- SKU:
- 09104731
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 67.00 MM
- DISPLACEMENT:
- 246 CC
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 66.94 MM
- PRODUCT NAME:
- PISTON KIT
$152.00 -
Wossner Piston Kit 53.97mm Suzuki RM125 2000-2003 8061DC
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8061DC, expertly crafted for 2-stroke engines. This premium kit includes everything you need for a high-performance upgrade, featuring advanced design and engineering for optimal efficiency...09104772- SKU:
- 09104772
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE:
- +0,02 MM
- BORE SIZE METRIC:
- 54.02 MM
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.02 MM
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 53.97 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- FORGED
$122.00 -
Wossner Honda CR125R 2000-2003 Piston Kit 8067DB
WOSSNER
$142.00Experience unmatched performance with the WOSSNER Piston Kit 8067DB, designed for enthusiasts who demand the best from their 2-stroke engines. Crafted from premium materials and engineered with precision, this piston kit ensures optimal efficiency and...09104779- SKU:
- 09104779
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE:
- +0,01 MM
- DISPLACEMENT:
- 125 CC
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.96 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 54.01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- +0.01 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
$142.00 -
Wossner Piston Kit 53.95mm Honda CR125R 2005-2007 8170DA
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8170DA, meticulously engineered for 2-stroke engines. This premium piston kit combines advanced materials and innovative design to enhance your engine's efficiency and longevity. Elevate...09104864- SKU:
- 09104864
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE SIZE METRIC:
- 54.00 MM
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.95 MM
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 125 CC
- PISTON MATERIAL:
- FORGED
$122.00 -
Wössner Piston Kit 53.95mm for KTM SX125 2007-2022 8174DA
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8174DA, meticulously engineered for 2-stroke engines. This premium kit includes everything you need for optimal engine efficiency, featuring a robust design that minimizes friction and...09104869- SKU:
- 09104869
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 54.00 MM
- DISPLACEMENT:
- 125 CC
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.95 MM
- PRODUCT NAME:
- PISTON KIT
$122.00 -
Wossner Dual Ring Piston Kit KTM 125 SX 2007-2025 54.01mm 8174DB
WOSSNER
$122.00Experience unparalleled performance with the WOSSNER Piston Kit 8174DB, expertly crafted for 2-stroke engines. This high-quality piston kit enhances engine efficiency and longevity, ensuring a smooth and powerful ride. Designed with precision...09104870- SKU:
- 09104870
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 54.01 MM
- DISPLACEMENT:
- 125 CC
- TYPE:
- DUAL RING
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.96 MM
- PRODUCT NAME:
- PISTON KIT
$122.00 -
Wossner Piston Kit 71.95mm for KTM 300 XC 2008-2011 8250DB
WOSSNER
$192.00Elevate your engine's performance with the WOSSNER Piston Kit 8250DB, designed for those who demand reliability and efficiency. Crafted from high-quality materials and featuring advanced engineering techniques, this piston kit ensures optimal performance...09104896- SKU:
- 09104896
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 71.95 MM
- TYPE:
- DUAL RING
- BORE SIZE METRIC:
- 72.01 MM
- DISPLACEMENT:
- 293 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +0.01 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$192.00Qty in Cart: 0Quantity:Price:$192.00Subtotal: -
Wossner Piston Kit 77.97mm Honda CRF250R 2004-2005 CRF250X 2004-2017 8587DC
WOSSNER
$184.00Elevate your engine's performance with the WOSSNER Piston Kit 8587DC, designed for 2-stroke engines. Crafted from high-quality materials and engineered for precision, this piston kit ensures optimal performance, reduced friction, and enhanced durability,...09104940- SKU:
- 09104940
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PREMIUM SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 77.97 MM
- COMPRESSION RATIO IMPERIAL:
- 12.9:1
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 78.02 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,02 MM
- BORE - OVERSIZE METRIC:
- +0.02 MM
$184.00 -
Wossner 94.95mm Piston Kit for 2008-2011 KTM 450 EXC-R 8707DA
WOSSNER
$204.00Elevate your engine's performance with the WOSSNER Piston Kit 8707DA, designed for 2-stroke applications. This premium piston kit combines advanced engineering with high-quality materials, ensuring optimal performance, durability, and reduced friction...09104969- SKU:
- 09104969
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 95.00 MM
- PISTON SIZE METRIC:
- 94.95 MM
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- COMPRESSION RATIO IMPERIAL:
- 11.9:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$204.00 -
Wossner Piston Kit 94.96mm 11.9:1 Husaberg FE450 2009-2012 8707DB
WOSSNER
$204.00Experience superior performance with the WOSSNER Piston Kit 8707DB, engineered for 2-stroke engines. Crafted from high-quality materials, this piston kit ensures enhanced durability and reduced friction, providing a quieter ride and improved efficiency...09104970- SKU:
- 09104970
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE - OVERSIZE:
- +0,01 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 95.01 MM
- PISTON SIZE METRIC:
- 94.96 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- COMPRESSION RATIO IMPERIAL:
- 11.9:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$204.00 -
Wossner Yamaha YZ250F 2008-2013 Piston Kit 8712DA
WOSSNER
$184.00Enhance your engine's performance with the WOSSNER Piston Kit 8712DA, meticulously crafted for optimal efficiency and durability. This high-quality kit is engineered to minimize friction and noise, ensuring a smoother ride and improved engine response...09104972- SKU:
- 09104972
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE METRIC:
- 77.00 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- MODEL:
- PREMIUM SERIES
- PISTON SIZE METRIC:
- 76.96 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$184.00Qty in Cart: 0Quantity:Price:$184.00Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit for KTM 50 SX 2013-2016 WR101-159
WRENCH RABBIT
$632.95The WRENCH RABBIT Engine Kit WR101-159 is your ultimate solution for a seamless engine rebuild. This all-inclusive kit features top-quality components designed to restore your engine's performance to peak condition, ensuring reliability and durability...09031260- SKU:
- 09031260
- Availability:
- Ships Same Business Day
- Weight:
- 5.80 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
$632.95 -
WSM Oil Filter Cap - Sea-Doo GTX 006-562
WSM
$26.84Model specific oil filter cap07120294- SKU:
- 07120294
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BASE COLOR:
- BLACK
- TYPE:
- OIL FILTER
- PRODUCT NAME:
- CAP
- RIDING STYLE:
- WATERCRAFT
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
$26.84 -
WSM Oil Drain Plug - Sea-Doo/Yamaha 011-158
WSM
$2.95Replacement oil drain plugs07120295- SKU:
- 07120295
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- PRODUCT NAME:
- PLUG
- BASE COLOR:
- BLACK
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- WATERCRAFT
- STYLE:
- YAMAHA
- STYLE:
- SEA-DOO
- TYPE:
- OIL DRAIN
$2.95
