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 Standard 66.40mm Honda CR250R 1997-2001 768M06640
WISECO
$199.95Upgrade your motorcycle's performance with the WISECO Piston Kit Standard CR250/R 768M06640. Designed for durability and efficiency, this piston kit enhances engine power while maintaining optimal compression. Please note that the kit does not include a...09101236- SKU:
- 09101236
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 66.40 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
$199.95 -
Wiseco KX125 2001-2002 Piston Kit with Gaskets PK1502
WISECO
$209.95Experience unmatched performance with the WISECO Piston Kit, designed specifically for high-demand 2-cycle engines. This complete kit includes everything you need for a top-notch rebuild, ensuring reliability and efficiency at elevated temperatures. ...09030697- SKU:
- 09030697
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE - OVERSIZE:
- STANDARD
- PISTON DIAMETER METRIC:
- 53.95 MM
- SKIRT COATING:
- NON-COATED
- BORE SIZE METRIC:
- 54.00 MM
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$209.95Qty in Cart: 0Quantity:Price:$209.95Subtotal: -
Wiseco Piston Kit Kawasaki KX85 2001-2008 782M04950
WISECO
$134.95Upgrade your KX85 with the high-performance WISECO Piston Kit, designed for optimal power and durability. This kit enhances engine efficiency and provides a reliable fit for models from 2001 to 2008. Please note that a gasket kit is not included, so...09101238- SKU:
- 09101238
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BORE - OVERSIZE:
- +1,00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 45.80 MM
- BORE SIZE METRIC:
- 49.50 MM
- DISPLACEMENT:
- 84,9 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
$134.95 -
Wiseco Piston Kit 89mm Honda CR500R 1984-2001 871M08900
WISECO
$234.95The WISECO Piston Standard 871M08900 is engineered for high-performance applications, providing exceptional durability and precision. Designed for optimal fit and function, this piston enhances engine efficiency and power output. Please note that a...09102022- SKU:
- 09102022
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 89.00 MM
- DISPLACEMENT:
- 472 CC
- STROKE LENGTH METRIC:
- 76.00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- EACH
$234.95Qty in Cart: 0Quantity:Price:$234.95Subtotal: -
Wiseco Suzuki RM125 2004-2007 Piston Kit with Gaskets PK1377
WISECO
$234.95Experience unparalleled performance with the WISECO Piston Kit, expertly engineered for 2-cycle engines. Crafted from high-silicone forged aluminum, this kit ensures exceptional strength and reduced thermal expansion, making it ideal for high-performance...09030531- SKU:
- 09030531
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- PISTON DIAMETER METRIC:
- 53.95 MM
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE SIZE METRIC:
- 54.00 MM
- DISPLACEMENT:
- 125 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- TYPE:
- TOP END
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
$234.95 -
Wiseco 72mm Piston Kit for 2005-2007 KTM 300 EXC PK1409
WISECO
$284.95Upgrade your engine's performance with the WISECO Piston Kit, designed specifically for 2-cycle applications. Crafted from high-silicone forged aluminum, this kit offers superior strength and minimal thermal expansion, ensuring reliability at high...09030534- SKU:
- 09030534
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
- BORE SIZE METRIC:
- 72.00 MM
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- DISPLACEMENT:
- 297 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 73.00 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 71.94 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$284.95 -
Wiseco Piston Kit Yamaha PW50 1981-2025 653M04200
WISECO
$109.95Upgrade your Yamaha PW50 with the WISECO Piston Kit, designed for optimal performance and durability. This high-quality piston kit enhances engine efficiency, ensuring a smoother ride and improved power output. Please note that this kit does not include...09102871- SKU:
- 09102871
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 42.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +2,00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 39.20 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 54 CC
$109.95 -
Wiseco Piston Kit Standard Bore 64.5mm Yamaha RT180 1990-1998 772M06450
WISECO
$154.95Upgrade your engine's performance with the WISECO Piston Kit Standard RT180 772M06450. Designed for durability and precision, this piston kit enhances your engine's efficiency while ensuring a perfect fit. Note that this kit does not include a gasket...09102875- SKU:
- 09102875
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- DISPLACEMENT:
- 176 CC
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 64.50 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
$154.95 -
Wiseco Yamaha RT180 1990-1998 Piston Kit 772M06550
WISECO
$154.95Upgrade your Yamaha RT180 with the WISECO Piston Kit, designed for optimal performance and durability. This high-quality piston kit enhances engine efficiency and power, ensuring a smoother ride and improved throttle response. Please note that this kit...09102877- SKU:
- 09102877
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 65.50 MM
- DISPLACEMENT:
- 182 CC
- STROKE LENGTH METRIC:
- 54.00 MM
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$154.95 -
Wiseco Piston Kit 47.00mm Bore KTM 65 SX 2009-2021 864M04700
WISECO
$134.95The WISECO Piston 864M04700 is engineered for superior performance and durability, crafted from a high-silicon alloy that enhances strength and reliability under extreme conditions. This piston is designed to withstand the rigors of high-performance...09102881- SKU:
- 09102881
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 47.00 MM
- BORE - OVERSIZE:
- +2,00 MM
- DISPLACEMENT:
- 70 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 40.80 MM
- UNITS:
- EACH
$134.95 -
Wiseco Piston Kit 54mm Standard 2014-2020 KTM 125 SX 868M05400
WISECO
$184.95The WISECO Piston Kit Standard 868M05400 is engineered for optimal performance and reliability, making it an essential upgrade for your engine. Designed with precision, this piston kit ensures a perfect fit and enhances the overall efficiency of your...09102882- SKU:
- 09102882
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 54.00 MM
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 54.00 MM
- RIDING STYLE:
- STREET
$184.95 -
Wiseco Piston Kit 92mm 12.5:1 Compression for 1998-2000 Yamaha WR400F 1998-1999 Yamaha YZ400F 4649M09200
WISECO
$239.95Engineered for peak performance, the Wiseco Piston 4649M09200 is crafted from high-silicon alloy, ensuring exceptional strength and reliability for both trail and racing enthusiasts. This piston is designed to meet the demands of high-performance...4649M09200- SKU:
- 4649M09200
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 91.92 MM
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 92 MM
- DISPLACEMENT:
- 399 CC
- STROKE LENGTH METRIC:
- 60.10 MM
$239.95 -
Wiseco Piston Kit 78mm 11:1 Compression Kawasaki KLX300R 1997-2006 4630M07800
WISECO
$194.95Engineered for peak performance, the Wiseco Piston 4630M07800 is crafted from a high-silicon alloy, ensuring exceptional strength and durability. This piston is ideal for both trail riding and competitive racing, offering reliability that meets the...4630M07800- SKU:
- 4630M07800
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 78.00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 292 CC
- PISTON DIAMETER METRIC:
- 77.95 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 61.20 MM
$194.95 -
Wiseco Piston Kit 54mm 11:1 Compression for Yamaha TT-R125 2000-2009 4752M05400
WISECO
$154.95Engineered for performance and durability, the Wiseco Piston 4752M05400 is crafted from a premium high-silicon alloy, ensuring exceptional strength for both trail and racing applications. This piston is designed to enhance your engine's efficiency while...4752M05400- SKU:
- 4752M05400
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 123.7 CC
- PISTON DIAMETER METRIC:
- 53.95 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 54.00 MM
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.00 MM
$154.95 -
Wiseco Piston Kit 54.5mm 11:1 Compression for Yamaha TT-R125 2000-2009 4752M05450
WISECO
$154.95Engineered for peak performance, the Wiseco Piston 4752M05450 is crafted from a high-silicon alloy, ensuring exceptional strength and reliability in both competitive and recreational settings. This piston is designed to optimize power and efficiency,...4752M05450- SKU:
- 4752M05450
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- STROKE LENGTH METRIC:
- 54.00 MM
- DISPLACEMENT:
- 123.7 CC
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 54.50 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 54.45 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$154.95 -
Wiseco TTR125 2000-2021 11:1 Compression Piston Kit 4752M05500
WISECO
$154.95Experience unmatched performance and reliability with the Wiseco Piston 4752M05500, expertly crafted from high-silicon alloy. Designed for both trail and racing applications, this piston ensures optimal strength and durability. Each unit comes complete...4752M05500- SKU:
- 4752M05500
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE SIZE METRIC:
- 55.00 MM
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 123.7 CC
- PISTON DIAMETER METRIC:
- 54.95 MM
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH METRIC:
- 54.00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$154.95 -
Wiseco YZ490 IT490 1982-1984 Piston Kit 478M08700
WISECO
$234.95Engineered for superior performance, the Wiseco Piston 478M08700 is crafted from a high-silicon alloy that ensures exceptional strength and durability. This piston is designed to meet the demands of both trail and racing applications, providing...478M08700- SKU:
- 478M08700
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE SIZE METRIC:
- 87.00 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 487 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 86.92 MM
- STROKE LENGTH METRIC:
- 82.00 MM
$234.95 -
Wiseco Piston Kit 98mm 9:1 Compression Honda XR600R 1985-2000 4577M09800
WISECO
$239.95Engineered for performance and durability, the Wiseco Piston 4577M09800 is crafted from a high-silicon alloy, ensuring exceptional strength for both racing and trail applications. This piston comes complete with rings and circlips, making it a convenient...4577M09800- SKU:
- 4577M09800
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- BORE - OVERSIZE:
- +1,00 MM
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON DIAMETER METRIC:
- 97.92 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 591 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STROKE LENGTH METRIC:
- 80.00 MM
- BORE SIZE METRIC:
- 98.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
$239.95 -
Wiseco Piston Kit Yamaha YZ80 1976-1980 457M05000
WISECO
$134.95Engineered for exceptional performance, the Wiseco Piston 457M05000 is crafted from a high-silicon alloy that ensures superior strength and reliability. Designed for both trail and racing enthusiasts, this piston is compatible with a wide range of...457M05000- SKU:
- 457M05000
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 42.00 MM
- BORE SIZE METRIC:
- 50.00 MM
- DISPLACEMENT:
- 79 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON DIAMETER METRIC:
- 49.95 MM
$134.95 -
Wiseco Piston Kit Kawasaki KX85 2014-2020 RE924M05050
WISECO
$149.95Experience unmatched performance and reliability with the WISECO Racer Elite RE924M05050 piston kit. Engineered with cutting-edge technology, this piston is designed to withstand extreme conditions while ensuring optimal engine efficiency. With over 75...09105091- SKU:
- 09105091
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORFIT™
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 50.50 MM
- PISTON MATERIAL:
- 2000 SERIES ALLOY
- BORE - OVERSIZE:
- +2,00 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- RACER ELITE
- UNITS:
- KIT
$149.95
