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 89mm 12:1 Compression for 2003-2007 KTM 450 EXC-F 4942M08900
WISECO
$284.95Experience unparalleled performance with the Wiseco Piston Kit, expertly crafted for riders who demand both power and reliability. This kit is engineered to enhance your engine's capabilities, ensuring a thrilling ride whether on the trails or the...09101674- SKU:
- 09101674
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- DISPLACEMENT:
- 448 CC
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 89.00 MM
- SKIRT COATING:
- MOLY COATED
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$284.95 -
Wiseco Piston Kit Standard KTM 360 SX 1996-1997 747M07800
WISECO
$244.95Transform your KTM 360 SX with the Wiseco Piston Kit, crafted for unmatched performance and reliability. Designed for serious riders, this kit enhances your bike's capabilities, making it perfect for both competitive racing and rugged trails. Premium...09101694- SKU:
- 09101694
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 78.00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GP STYLE
- STROKE LENGTH METRIC:
- 74.00 MM
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 353 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$244.95Qty in Cart: 0Quantity:Price:$244.95Subtotal: -
Wiseco Piston Kit 58mm for Suzuki RM125 2004-2008 836M05800
WISECO
$199.95Transform your Suzuki's performance with the Wiseco Piston Kit, meticulously crafted to deliver unrivaled power and reliability. This premium piston kit is the perfect upgrade for riders seeking enhanced engine efficiency and longevity. Precision CNC...09101696- SKU:
- 09101696
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.00 MM
- BORE SIZE METRIC:
- 58.00 MM
- DISPLACEMENT:
- 125 CC
- ENGINE TYPE:
- 2-STROKE
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$199.95 -
Wiseco Piston Kit Gas Gas EC 300 2015-2018 850M07200
WISECO
$244.95Elevate your engine's performance with the Wiseco Piston Kit. Engineered for 2-stroke engines, this kit combines cutting-edge technology with robust materials to ensure exceptional power and reliability, even in the most demanding conditions. Premium...09101699- SKU:
- 09101699
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- DISPLACEMENT:
- 293 CC
- RIDING STYLE:
- STREET
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
$244.95 -
Wiseco Piston Kit Standard 47mm 10.5:1 Honda CRF70F 2004-2012 4880M04700
WISECO
$134.95Unlock the full potential of your Honda with the Wiseco Piston Kit. Designed for performance enthusiasts, this kit enhances your bike's capabilities, making it ideal for both off-road adventures and daily rides. Precision Engineering: Crafted with...09100747- SKU:
- 09100747
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE METRIC:
- 47.00 MM
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 41.40 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- DISPLACEMENT:
- 72 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$134.95 -
WISECO Piston Kit with Gaskets PK1399
WISECO
$324.95Boost your Suzuki RM-Z450’s power and reliability with the Wiseco Piston Kit - PK1399. Engineered for maximum durability and performance, this top-of-the-line kit is built to meet the demands of riders who push their bikes to the limit. Key...09030569- SKU:
- 09030569
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- BORE SIZE METRIC:
- 95.50 MM
- MODEL:
- FORGED SERIES
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- TOP END
- DISPLACEMENT:
- 450 CC
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.80 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- PISTON DIAMETER METRIC:
- 95.44 MM
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
$324.95 -
Wiseco Piston Kit 48mm 10.5:1 Compression for Honda CRF70F 2004-2012 4880M04800
WISECO
$134.95Transform your Honda XR/CRF70 with the Wiseco Piston Kit, designed for riders seeking exceptional performance and reliability. This high-quality piston kit enhances your engine's efficiency and power output, ensuring your bike performs at its best on any...09100749- SKU:
- 09100749
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- DISPLACEMENT:
- 75 CC
- DISPLACEMENT:
- 72 CC
- STROKE LENGTH METRIC:
- 41.40 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 48.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$134.95 -
Wiseco Piston Kit 49.50 mm Bore Honda XR80 1979-1984 4665M04950
WISECO
$169.95Elevate your Honda's performance with the Wiseco Piston Kit, engineered for superior strength and efficiency. This high-performance kit is ideal for both casual riders and competitive racers, ensuring you get the most out of your engine. Premium...09100327- SKU:
- 09100327
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 49.50 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +2.00 MM
- DISPLACEMENT:
- 87 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.00 MM
- UNITS:
- EACH
$169.95 -
Wiseco Piston Kit 67.50mm 0.50mm Oversize for Suzuki RM250 1977-1981 405M06750
WISECO
$199.95Elevate your riding experience with the Wiseco Piston Kit, specifically designed for the Suzuki PE250 and RM250. This high-performance upgrade ensures optimal power delivery and enhanced durability, making it the ideal choice for serious riders seeking...405M06750- SKU:
- 405M06750
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE METRIC:
- 67.50 MM
- DISPLACEMENT:
- 246 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 70.00 MM
- PISTON DIAMETER METRIC:
- 67.44 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$199.95 -
Wiseco Piston Kit Yamaha YZ250F 2008-2011 4952M07700
WISECO
$279.95Unlock the true potential of your Yamaha YZ250F with the Wiseco Piston Kit, engineered for superior performance and reliability. Designed for high-demand environments, this kit enhances your bike's power while ensuring durability for every ride...09102936- SKU:
- 09102936
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- STROKE LENGTH METRIC:
- 53.60 MM
- BORE - OVERSIZE:
- +6,00 MM
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +6.00 MM
- BORE SIZE METRIC:
- 83.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
$279.95 -
Wiseco Piston Kit for Honda XR650L 1993-2021 4989M10000
WISECO
$239.95Elevate your Honda's performance with the Wiseco Piston Kit, crafted for those who demand exceptional power and reliability. This premium kit is designed to enhance your riding experience, whether you're tackling tough trails or enjoying a leisurely ride...09102939- SKU:
- 09102939
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- BORE SIZE METRIC:
- 100.00 MM
- STROKE LENGTH METRIC:
- 82.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 650 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
$239.95 -
Wiseco Honda XR650L 1993-2021 Piston Kit 4989M10241
WISECO
$269.95Wiseco Performance Piston Kit - 4989M10241 Elevate your Honda's performance with the Wiseco Performance Piston Kit, designed for riders who demand superior power and reliability. This premium kit enhances your motorcycle's capabilities, ensuring an...09102941- SKU:
- 09102941
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- STROKE LENGTH METRIC:
- 82.00 MM
- PISTON MATERIAL:
- FORGED
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- BORE - OVERSIZE:
- +2,40 MM
- BORE - OVERSIZE METRIC:
- +2.40 MM
- BORE SIZE METRIC:
- 102.40 MM
- DISPLACEMENT:
- 650 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$269.95 -
Wiseco Piston Kit 2.00mm Oversize 58.00mm Bore Yamaha YZ125 1976-1982 435M05800
WISECO
$179.95Wiseco Piston Kit - 435M05800 Transform your Yamaha YZ125 into a powerhouse with the Wiseco Piston Kit. Engineered for both competitive and casual riders, this kit delivers exceptional performance and reliability, ensuring your bike excels in any...435M05800- SKU:
- 435M05800
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- BORE SIZE METRIC:
- 58.00 MM
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 57.95 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 50.00 MM
- BORE - OVERSIZE:
- +2,00 MM
- DISPLACEMENT:
- 123 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$179.95 -
Wossner Connecting Rod Kawasaki KX500 1989-2004 P2039
WOSSNER
$152.00Elevate your engine's performance with the WOSSNER Connecting Rod Kit, meticulously engineered for the KX500. This comprehensive kit includes everything necessary for a complete crankshaft rebuild, ensuring superior strength and longevity through...09230417- SKU:
- 09230417
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- UNITS:
- KIT
- STYLE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
$152.00 -
Wossner 50 SX 2007-2023 Connecting Rod P2053
WOSSNER
$112.00Elevate your engine's performance with the WOSSNER Connecting Rod P2053, expertly engineered for durability and efficiency. This premium connecting rod kit includes everything you need for a complete crankshaft rebuild, ensuring a precise fit with OEM...09230419- SKU:
- 09230419
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
$112.00 -
Wossner Connecting Rod for KTM 65 SX 2009-2025 P2055
WOSSNER
$112.00Elevate your KTM 65SX performance with the WOSSNER Connecting Rod Kit, meticulously engineered for durability and precision. This comprehensive kit includes all essential components for a seamless crankshaft rebuild, ensuring optimal compatibility with...09230421- SKU:
- 09230421
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- STYLE:
- STANDARD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
$112.00 -
Wossner Connecting Rod Kit for KTM 85 SX 2013-2025 P2065
WOSSNER
$112.00The WOSSNER Connecting Rod SX85 P2065 is engineered for performance and durability, making it an ideal choice for your crankshaft rebuild. Crafted from high-quality 8620 forged alloy, this connecting rod kit ensures optimal strength and longevity...09230426- SKU:
- 09230426
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- STYLE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$112.00 -
Wossner Connecting Rod Kawasaki KX250F 2004-2009 P4002
WOSSNER
$174.00The WOSSNER Connecting Rod Kit for the KX250F is meticulously crafted to ensure optimal performance and durability. Designed with precision engineering, this kit is essential for a successful crankshaft rebuild, providing a reliable fit with OEM...09230429- SKU:
- 09230429
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- STANDARD
$174.00 -
Wossner Connecting Rod Yamaha YZ250F 2001-2002 P4006
WOSSNER
$174.00Elevate your YZ250F's performance with the WOSSNER Connecting Rod Kit, meticulously engineered for optimal durability and efficiency. This comprehensive kit includes everything you need for a complete crankshaft rebuild, ensuring a perfect fit with OEM...09230433- SKU:
- 09230433
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
$174.00 -
Wossner Piston Kit 47.47mm Yamaha YZ85 2002-2025 8104DC
WOSSNER
$112.00Experience unparalleled performance with the WOSSNER Piston Kit 8104DC, engineered specifically for 2-stroke engines. Crafted from high-quality materials, this piston kit delivers exceptional durability and efficiency, ensuring your engine operates at...09104834- SKU:
- 09104834
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 47.47 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.02 MM
- BORE SIZE METRIC:
- 47.52 MM
- MODEL:
- STANDARD SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,02 MM
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- FORGED
$112.00
