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 48mm Piston Kit for 1985-1988 1990-1991 Honda XR80R PK1277
WISECO
$179.95Elevate your engine's performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. Crafted from high-silicone forged aluminum, this kit ensures exceptional strength and minimal thermal expansion, making it perfect for...09030229- SKU:
- 09030229
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 47.97 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.00 MM
- BORE - OVERSIZE:
- +0,50 MM
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 48.00 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- DISPLACEMENT:
- 79.7 CC
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
$179.95 -
Wiseco Piston Kit 49mm Honda CRF80F 2004-2013 PK1227
WISECO
$179.95Elevate your engine's performance with the WISECO Piston Kit, designed specifically for 2-cycle applications. Crafted from high-silicone forged aluminum, this kit ensures superior strength and reduced thermal expansion, making it ideal for...09030232- SKU:
- 09030232
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE:
- +1,50 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE SIZE METRIC:
- 49.00 MM
- DISPLACEMENT:
- 79.7 CC
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 45.00 MM
- PISTON DIAMETER METRIC:
- 48.97 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- REBUILD KIT
$179.95Qty in Cart: 0Quantity:Price:$179.95Subtotal: -
Wiseco Honda XR200 1980-1983 Piston Kit with Gaskets 66.50mm PK1118
WISECO
$204.95Experience unmatched performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. Crafted from high-silicone forged materials, this kit ensures superior strength and reduced thermal expansion, making it ideal for high-performance...09030235- SKU:
- 09030235
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE SIZE METRIC:
- 66.50 MM
- PISTON DIAMETER METRIC:
- 66.45 MM
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 192 CC
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 57.80 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
$204.95Qty in Cart: 0Quantity:Price:$204.95Subtotal: -
Wiseco Piston Kit with Gaskets for Kawasaki KX65 2000-2020 PK1177
WISECO
$164.95Experience unparalleled performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. Crafted from high-silicone forged materials, this kit ensures exceptional strength and minimal thermal expansion, making it ideal for...09030304- SKU:
- 09030304
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 44.50 MM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 41.60 MM
- DISPLACEMENT:
- 64 CC
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 44.45 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$164.95Qty in Cart: 0Quantity:Price:$164.95Subtotal: -
Wiseco Piston Kit with Gaskets for Kawasaki KX85 2001-2013 PK1187
WISECO
$164.95Experience unparalleled performance with the WISECO Piston Kit, meticulously engineered for 2-cycle engines. Crafted from high-silicone forged material, this kit ensures enhanced strength and reduced thermal expansion, making it ideal for...09030306- SKU:
- 09030306
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 45.80 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 48.50 MM
- DISPLACEMENT:
- 84.9 CC
- PISTON DIAMETER METRIC:
- 48.45 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$164.95 -
Wiseco 66.40mm Top End Kit for 2002-2004 Honda CR250R PK1195
WISECO
$254.95Elevate your engine's performance with the WISECO Piston Kit, meticulously crafted for optimal strength and durability. This complete kit includes everything you need for a high-performance upgrade, ensuring your engine runs smoothly under demanding...09030307- SKU:
- 09030307
- Availability:
- Ships Same Business Day
- Weight:
- 1.39 LBS
- DISPLACEMENT:
- 249 CC
- PRODUCT NAME:
- REBUILD KIT
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- SKIRT COATING:
- NON-COATED
- BORE SIZE METRIC:
- 66.40 MM
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 66.36 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$254.95 -
Wiseco YZ250 2002-2025 Piston Kit with Gaskets PK1198
WISECO
$244.95Upgrade your engine's performance with the WISECO Piston Kit, designed for optimal strength and efficiency. Each kit includes everything you need for a complete top-end rebuild, ensuring your engine operates at its best. Crafted from high-silicone forged...09030308- SKU:
- 09030308
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 66.36 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 66.40 MM
- MODEL:
- PRO-LITE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$244.95 -
Wiseco Yamaha YZ125 1998-2000 Piston Kit with Gaskets PK1173
WISECO
$209.95Enhance your engine's performance with the WISECO Piston Kit PK1173, designed specifically for high-efficiency 2-cycle applications. This comprehensive kit provides everything you need for a complete top-end rebuild, ensuring optimal strength and...09030309- SKU:
- 09030309
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- DISPLACEMENT:
- 124 CC
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE SIZE METRIC:
- 54.00 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 53.95 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$209.95 -
Wiseco Piston Kit with Gaskets for 1997-2001 Honda CR250R PK1168
WISECO
$254.95Upgrade your engine's performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. This complete kit features high-performance forged pistons made from high-silicone bar stock, ensuring greater strength and reduced thermal expansion...09030311- SKU:
- 09030311
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- DISPLACEMENT:
- 249 CC
- PRODUCT NAME:
- REBUILD KIT
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 66.36 MM
- SKIRT COATING:
- NON-COATED
- BORE SIZE METRIC:
- 66.40 MM
- MODEL:
- PRO-LITE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$254.95 -
Wiseco YZ250 2002-2022 Piston Kit with Gaskets PK1704
WISECO
$274.95Elevate your engine performance with the WISECO Piston Kit, crafted from high-silicon aluminum alloy for unparalleled strength and reliability. This comprehensive kit includes everything you need for overboring or rebuilding your top end, ensuring...09030929- SKU:
- 09030929
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- COOLING SYSTEM:
- LIQUID COOLED
- DISPLACEMENT:
- 249,3 CC
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 66.40 MM
- PISTON MATERIAL:
- ALUMINUM
- PISTON MATERIAL:
- FORGED
- MODEL:
- RACER'S CHOICE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- EACH
$274.95 -
Wiseco KX85 2001-2013 Piston Kit with Gaskets PK1762
WISECO
$179.95Upgrade your engine's performance with the WISECO Piston Kit, designed specifically for 2-cycle applications. Crafted from high-silicone forged materials, this kit ensures exceptional strength and minimal thermal expansion at elevated temperatures,...09030930- SKU:
- 09030930
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- DISPLACEMENT:
- 84.9 CC
- ENGINE TYPE:
- 2-STROKE
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- GP SERIES
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
- BORE SIZE METRIC:
- 48.50 MM
- PISTON DIAMETER METRIC:
- 48.45 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 45.80 MM
- UNITS:
- KIT
$179.95 -
Wiseco Piston Kit Standard 54mm Honda CR125R 1992-2003 676M05400
WISECO
$129.95Elevate your performance with the WISECO Piston, expertly crafted from high-silicon aluminum alloy for exceptional strength and reliability. Designed for both competitive racing and trail riding, this piston enhances durability and maximizes horsepower,...676M05400- SKU:
- 676M05400
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- BORE SIZE METRIC:
- 54.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- STROKE LENGTH:
- 54,50 MM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- PISTON
$129.95 -
Wiseco Piston Kit 54.50 mm Honda CR125R 1992-2003 676M05450
WISECO
$154.95Experience unmatched performance with the Wiseco forged piston, designed specifically for the Honda CR125R. Crafted from high-silicon aluminum alloy, this piston delivers exceptional durability and power, making it ideal for both racing and trail riding...676M05450- SKU:
- 676M05450
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE:
- +0,50 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 54.50 MM
- DISPLACEMENT:
- 125 CC
- ENGINE TYPE:
- 2-STROKE
- STROKE LENGTH:
- 54,50 MM
- STROKE LENGTH METRIC:
- 54.50 MM
$154.95 -
Wiseco Piston Kit 52.00 mm Oversize Suzuki RM 85 2002-2022 806M05200
WISECO
$169.95Experience unparalleled performance and reliability with the Wiseco +5.00 mm piston, designed specifically for the Suzuki RM 85/L. Crafted from high-silicon aluminum alloy, this piston ensures maximum strength and longevity, making it ideal for both...806M05200- SKU:
- 806M05200
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- DISPLACEMENT:
- 99.4 CC
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- +5,00 MM
- BORE - OVERSIZE METRIC:
- +5.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 46.80 MM
- UNITS:
- EACH
- BORE SIZE METRIC:
- 52.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 46,80 MM
$169.95 -
Wiseco Piston Kit 56.00mm 2.00mm Oversize for KTM 125 SX 2001-2021 786M05600
WISECO
$174.95Experience unparalleled performance with the Wiseco Piston, expertly crafted from a high-silicon aluminum alloy for exceptional strength and reliability. Designed for both trail and racing applications, this piston enhances durability and horsepower,...786M05600- SKU:
- 786M05600
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- DISPLACEMENT:
- 124 CC
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 56.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- STROKE LENGTH:
- 54,50 MM
$174.95Qty in Cart: 0Quantity:Price:$174.95Subtotal: -
Wiseco Piston Kit 54mm Bore Kawasaki KX125 2001-2008 788M05400
WISECO
$184.95Elevate your racing experience with the Wiseco Piston, expertly crafted from high-silicon aluminum alloy for unmatched strength and reliability. Designed for both competitive and recreational use, this piston maximizes horsepower and torque while...788M05400- SKU:
- 788M05400
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- BORE SIZE METRIC:
- 54.00 MM
- DISPLACEMENT:
- 125 CC
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- STROKE LENGTH:
- 54,50 MM
- STROKE LENGTH METRIC:
- 54.50 MM
$184.95 -
Wiseco Piston Kit 81mm Yamaha WaveRunner 1994-1997 790M08100
WISECO
$159.95The WISECO Piston 790M08100 is engineered for superior performance in 2-cycle engines, crafted from high-silicone forged bar stock to ensure exceptional strength and minimal thermal expansion. Designed specifically for high-performance applications, this...790M08100- SKU:
- 790M08100
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 81.00 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 701 CC
- UNITS:
- EACH
- RIDING STYLE:
- WATERCRAFT
$159.95 -
Wiseco 80.50mm Piston Kit for Kawasaki 1100 ZXi 1996-2003 809M08050
WISECO
$149.95Experience unmatched performance with the WISECO Piston 809M08050, designed specifically for high-demand 2-cycle applications. Crafted from premium high-silicone forged bar stock, this piston ensures superior strength and minimal thermal expansion,...809M08050- SKU:
- 809M08050
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- WATERCRAFT
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 1083 CC
- DISPLACEMENT:
- 752 CC
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- BORE SIZE METRIC:
- 80.50 MM
- UNITS:
- EACH
$149.95 -
Wiseco Piston Kit 95mm 11.8:1 Compression KTM 450 XC-F 2012-2016 PK1901
WISECO
$329.95Upgrade your KTM engine with the WISECO Piston Kit, designed for optimal performance and durability. This comprehensive kit includes everything you need for a complete top-end rebuild, ensuring your engine runs smoothly and efficiently. With...09031145- SKU:
- 09031145
- Availability:
- Ships Same Business Day
- Weight:
- 1.76 LBS
- BORE SIZE METRIC:
- 95.00 MM
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 63.40 MM
- TYPE:
- TOP END
- DISPLACEMENT:
- 449 CC
- PISTON DIAMETER METRIC:
- 94.95 MM
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORGLIDE®
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- BORE - OVERSIZE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 11.8:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$329.95Qty in Cart: 0Quantity:Price:$329.95Subtotal: -
Wiseco Piston Kit with Gasket for Kawasaki KX85 2014-2023 PK1904
WISECO
$169.95Experience unparalleled performance with the WISECO Piston Kit, specifically designed for Kawasaki engines. This complete kit features high-performance forged pistons that deliver exceptional strength and reduced thermal expansion, ensuring optimal...09031148- SKU:
- 09031148
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 84.9 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- REBUILD KIT
- PISTON DIAMETER METRIC:
- 48.45 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 45.80 MM
- UNITS:
- KIT
- BORE SIZE METRIC:
- 48.50 MM
- MODEL:
- PRO-LITE
- SKIRT COATING:
- NON-COATED
- TYPE:
- TOP END
$169.95
