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 66.5mm Honda ATC 250R 1985-1986 526M06650
WISECO
$204.95Unlock the full potential of your engine with the Wiseco Piston Kit, meticulously designed for those who crave both performance and reliability. Ideal for trailblazers and competitive racers alike, this piston kit guarantees enhanced power and durability...526M06650- SKU:
- 526M06650
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- STROKE LENGTH:
- 72,00 MM
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 246 CC
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 66.50 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
$204.95 -
Wiseco Piston 66.75mm 1985-1986 Honda ATC 250R 526M06675
WISECO
$204.95Transform your riding experience with the Wiseco Piston Kit, meticulously crafted for those who demand peak performance from their machines. This kit not only enhances your engine's efficiency but also ensures reliability under the most challenging...526M06675- SKU:
- 526M06675
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- STROKE LENGTH:
- 72,00 MM
- BORE - OVERSIZE METRIC:
- +0.75 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +0,75 MM
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 66.75 MM
- DISPLACEMENT:
- 246 CC
- PISTON MATERIAL:
- ALUMINUM
- STROKE LENGTH METRIC:
- 72.00 MM
$204.95 -
Wiseco Piston Kit 67.25mm for 1986 Honda TRX250R 526M06725
WISECO
$229.95Elevate your riding experience with the Wiseco Performance Piston Kit, engineered for optimal power and reliability. Ideal for both competitive racing and rugged trail riding, this piston kit is built to handle the toughest conditions while maximizing...526M06725- SKU:
- 526M06725
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 72,00 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,25 MM
- BORE SIZE METRIC:
- 67.25 MM
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE METRIC:
- +1.25 MM
- DISPLACEMENT:
- 246 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$229.95 -
Wiseco Piston 1986 Honda TRX250R 67.25mm 526M06725
WISECO
$229.95Elevate your riding experience with the Wiseco Pro-Lite Piston Kit, expertly crafted for Honda 2-stroke engines. This piston kit provides exceptional performance and reliability, ensuring that every ride is not only powerful but also smooth and enjoyable...526M06750- SKU:
- 526M06750
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE:
- +1,50 MM
- BORE SIZE METRIC:
- 67.50 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- DISPLACEMENT:
- 246 CC
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 72,00 MM
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
$229.95 -
Wiseco Piston Kit 68.00 mm Bore Honda ATC 250 R 1985-1986 526M06800
WISECO
$229.95Elevate your riding experience with the Wiseco Pro-Lite Piston Kit, meticulously engineered for peak performance and reliability. Designed for serious racers and enthusiasts, this piston kit promises to enhance your engine's capabilities, ensuring you...526M06800- SKU:
- 526M06800
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 68.00 MM
- DISPLACEMENT:
- 246 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 72.00 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE - OVERSIZE:
- +2,00 MM
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 72,00 MM
$229.95 -
Wiseco Suzuki RM250 1982-1985 Piston Kit 70.00mm 485M07000
WISECO
$199.95Transform your Suzuki RM250 into a powerhouse with the Wiseco Piston Kit 485M07000. Designed for both competitive racers and passionate trail riders, this piston kit offers unmatched strength and performance, ensuring your bike operates at its best under...485M07000- SKU:
- 485M07000
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- ENGINE TYPE:
- 2-STROKE
- STROKE LENGTH METRIC:
- 64.00 MM
- DISPLACEMENT:
- 246 CC
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 70.00 MM
- PISTON DIAMETER METRIC:
- 69.92 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$199.95 -
Wiseco RM250 1982-1985 Piston Kit 70.50mm 485M07050
WISECO
$199.95Transform your Suzuki RM250 into a powerhouse with the Wiseco Piston Kit. Engineered for performance enthusiasts, this piston kit ensures your bike operates at its peak, delivering both power and reliability on every ride. High-Performance Alloy...485M07050- SKU:
- 485M07050
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE METRIC:
- 70.50 MM
- DISPLACEMENT:
- 246 CC
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 70.42 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 64.00 MM
- UNITS:
- KIT
$199.95 -
Wiseco Suzuki RM250 1982-1985 Piston Kit 485M07200
WISECO
$224.95Elevate your Suzuki's performance with the Wiseco Piston Kit 485M07200. Designed for enthusiasts who demand excellence, this piston kit enhances power delivery and reliability, making it an essential upgrade for any serious rider. Precision Engineering:...485M07200- SKU:
- 485M07200
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE - OVERSIZE:
- +2,00 MM
- DISPLACEMENT:
- 246 CC
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- FORGED SERIES
- BORE SIZE METRIC:
- 71.50 MM
- PISTON DIAMETER METRIC:
- 71.92 MM
- STROKE LENGTH METRIC:
- 64.00 MM
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco KX125 1982-1985 Piston Kit 486M05600
WISECO
$154.95Transform your Kawasaki KX125 into a powerhouse with the Wiseco Piston Kit 486M05600. Crafted for both competitive racers and casual riders, this piston kit enhances engine performance, ensuring you get the most out of every ride. Experience superior...486M05600- SKU:
- 486M05600
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- DISPLACEMENT:
- 124 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- STROKE LENGTH METRIC:
- 50.60 MM
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 56.00 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 55.95 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
$154.95 -
Wiseco Piston Kit 1983-1985 Suzuki RM80 50.00mm 497M05000
WISECO
$134.95Elevate your Suzuki RM80's performance with the Wiseco Piston Kit, engineered for exceptional strength and efficiency. This premium piston kit is designed to enhance your engine's power output and reliability, making it the ideal choice for both...497M05000- SKU:
- 497M05000
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 82,87 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH:
- 44,00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,00 MM
- STROKE LENGTH METRIC:
- 44.00 MM
- BORE SIZE METRIC:
- 50.00 MM
$134.95 -
Wiseco 1982-1983 Yamaha YZ80 48.00mm Piston Kit 477M04800
WISECO
$134.95Transform your Yamaha YZ80's performance with the Wiseco Piston Kit, designed specifically for serious racers and enthusiasts. Experience unparalleled power and reliability, ensuring your engine operates at its peak under even the most demanding...477M04800- SKU:
- 477M04800
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE:
- +1,00 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 48.00 MM
- PISTON DIAMETER METRIC:
- 47.95 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 79 CC
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 45.60 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
$134.95 -
Wiseco Piston Standard Kawasaki KDX 220 R 1997-2005 750M06900
WISECO
$184.95Elevate your Kawasaki KDX220 with the high-performance Wiseco Piston Kit. Designed for enthusiasts who seek superior power and reliability, this piston kit enhances your riding experience, whether you're racing or exploring rugged trails. Premium Alloy...750M06900- SKU:
- 750M06900
- Availability:
- Ships Same Business Day
- Weight:
- 0.68 LBS
- BORE SIZE METRIC:
- 69.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 58.00 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 216 CC
- STROKE LENGTH:
- 58,00 MM
$184.95 -
Wiseco Piston +1.00 mm Kawasaki KDX 220 R 1997-2005 750M07000
WISECO
$209.95Transform your Kawasaki KDX220R into a powerhouse with the Wiseco Piston Kit. Engineered for riders who demand peak performance, this kit enhances your bike's efficiency and reliability, ensuring a thrilling riding experience. High-Performance Aluminum...750M07000- SKU:
- 750M07000
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- DISPLACEMENT:
- 216 CC
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 58,00 MM
- BORE SIZE METRIC:
- 70.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 58.00 MM
$209.95 -
Wiseco Piston Standard Yamaha YZ125 2007 765M05400
WISECO
$184.95Unlock the full potential of your Yamaha YZ125 with the Wiseco Piston Kit, engineered for superior performance and reliability. This high-performance piston is crafted from premium materials, ensuring your bike operates at its best whether on the track...765M05400- SKU:
- 765M05400
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 54,50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 125 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE SIZE METRIC:
- 54.00 MM
$184.95 -
Wiseco Piston Standard KTM 125 SX 2005 740M05425
WISECO
$154.95Transform your KTM 125 SX into a powerhouse with the Wiseco Pro-Lite Piston Kit. Designed for maximum performance and reliability, this piston kit is perfect for riders who demand the best in every ride, whether on the track or off-road. CNC Machined...740M05425- SKU:
- 740M05425
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- DISPLACEMENT:
- 125 CC
- ENGINE TYPE:
- 2-STROKE
- STROKE LENGTH:
- 54,00 MM
- STROKE LENGTH METRIC:
- 54.00 MM
- BORE SIZE METRIC:
- 54.25 MM
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$154.95 -
Wiseco Piston Standard Kawasaki KX 125 1994 640M05400
WISECO
$154.95Elevate your Kawasaki KX125's performance with the Wiseco Performance Piston Kit. Designed specifically for two-stroke enthusiasts, this kit offers unparalleled power and reliability, ensuring your bike performs at its best on any terrain. Precision CNC...741M05400- SKU:
- 741M05400
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE SIZE METRIC:
- 54.00 MM
- STROKE LENGTH:
- 54,50 MM
$154.95 -
Wiseco Piston Kit 40.50mm for Yamaha PW50 1981-2021 653M04050
WISECO
$104.95Transform your Yamaha PW50 into a performance powerhouse with the Wiseco Piston Kit. Designed for enthusiasts who seek unparalleled reliability and efficiency, this kit enhances your bike's capabilities, whether you're racing on the track or exploring...653M04050- SKU:
- 653M04050
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 49 CC
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 39,20 MM
- STROKE LENGTH METRIC:
- 39.20 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE METRIC:
- +0.50 MM
- ENGINE TYPE:
- 2-STROKE
- UNITS:
- EACH
- BORE SIZE METRIC:
- 40.50 MM
$104.95Qty in Cart: 0Quantity:Price:$104.95Subtotal: -
Wiseco Piston Standard 66.40mm Kawasaki KX 250 2005-2008 607M06740
WISECO
$199.95Unleash the full potential of your Kawasaki with the Wiseco Piston Kit, engineered for 2-stroke performance enthusiasts. This high-quality piston kit is designed to enhance engine efficiency and deliver exceptional power, making it ideal for both...607M06740- SKU:
- 607M06740
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE METRIC:
- 67.40 MM
- DISPLACEMENT:
- 249 CC
- STROKE LENGTH:
- 70,00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 70.00 MM
- UNITS:
- EACH
$199.95 -
Wiseco Piston Kit 68.5mm Oversize Kawasaki KX 250 1992-2001 617M06850
WISECO
$199.95Unlock the full potential of your Kawasaki with the Wiseco Performance Piston Kit. Engineered for those who demand high performance and reliability, this kit ensures your bike excels on any terrain. Experience the perfect blend of power, precision, and...607M06800- SKU:
- 607M06800
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +0,60 MM
- BORE - OVERSIZE METRIC:
- +0.60 MM
- DISPLACEMENT:
- 249 CC
- STROKE LENGTH:
- 70,00 MM
- BORE SIZE METRIC:
- 68.00 MM
- PRODUCT NAME:
- PISTON
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 70.00 MM
- UNITS:
- EACH
$199.95 -
Wiseco Piston Kit 68.50mm 1991-1994 Kawasaki KDX250 607M06850
WISECO
$199.95Transform your Kawasaki into a powerhouse with the Wiseco Piston Kit, designed for optimal performance and durability. This piston kit is perfect for serious riders looking to enhance their machine's capabilities and ensure reliable operation under...607M06850- SKU:
- 607M06850
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE METRIC:
- +1.10 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 70.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,10 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 68.50 MM
- DISPLACEMENT:
- 249 CC
- STROKE LENGTH:
- 70,00 MM
$199.95
