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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Wossner Connecting Rod Honda CR500R 1987-2001 P2044
WOSSNER
$152.00The Wossner Connecting Rod P2044 is engineered for CR500R engines that demand reliability under extreme loads. If you're rebuilding your crankshaft or upgrading from OEM components, this forged rod delivers the fatigue resistance and precision fit needed...09230572- SKU:
- 09230572
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- STANDARD
$152.00 -
Wossner Connecting Rod for Kawasaki KX60 1983-2003 P2001
WOSSNER
$112.00The Wössner Connecting Rod for the KX60 is engineered for riders who demand reliability through complete engine rebuilds. When you're rebuilding a crankshaft, the connecting rod is the critical link between piston and crank—material quality and precision...09230388- SKU:
- 09230388
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
$112.00 -
Wossner Connecting Rod Kawasaki KX125 1988-1991 P2033
WOSSNER
$122.00When you're rebuilding a KX125 top-end or refreshing a tired bottom-end, a compromised connecting rod is a guaranteed path to catastrophic failure. The Wossner P2033 is engineered specifically for your KX125 (1988-1991) with 8620 forged alloy...09230391- SKU:
- 09230391
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Connecting Rod KTM 300 EXC 1990-2003 P2024
WOSSNER
$122.00If you're rebuilding a KTM 300 EXC engine, the connecting rod is where precision engineering directly translates to reliability under extreme conditions. The Wössner P2024 is engineered from 8620 forged alloy and shot peened for the durability demanded...09230392- SKU:
- 09230392
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$122.00 -
Wossner Connecting Rod Honda CR125R 1988-2007 P2009
WOSSNER
$122.00The Wössner Connecting Rod for your CR125R is engineered to handle the demands of competitive riding and high-rpm operation without compromise. A quality connecting rod is non-negotiable for crankshaft reliability—this forged component resists fatigue...09230393- SKU:
- 09230393
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Connecting Rod Yamaha YZ125 2001-2004 P2017
WOSSNER
$122.00A connecting rod is critical to crankshaft integrity—it's the component that translates combustion force into rotational power, and any weakness here compromises engine reliability and performance. The Wössner P2017 is engineered specifically for the...09230394- SKU:
- 09230394
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Piston Kit 44.45mm Kawasaki KX65 2000-2025 8196DA
WOSSNER
$102.00Stock pistons wear out under sustained racing loads, causing compression loss and power degradation. The Wossner 8196DA delivers precision-engineered durability with 4032 T6 forged aluminum and a friction-reducing skirt coating, giving you reliable...09104873- SKU:
- 09104873
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 64 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 44.50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 44.45 MM
$102.00Qty in Cart: 0Quantity:Price:$102.00Subtotal: -
Wossner Piston Kit Yamaha YZ250 1999-2025 66.35mm 8216DA
WOSSNER
$152.00The Wossner 8216DA piston kit delivers the reliability and performance demanded by 2-stroke racers who can't afford downtime or power loss. Purpose-built for the YZ250 platform across three decades of production, this complete kit eliminates the...09104877- SKU:
- 09104877
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 249 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 66.40 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 66.35 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner Piston Kit Yamaha YZ250 1999-2026 66.36mm 8216DB
WOSSNER
$152.00The Wossner 8216DB piston kit is engineered for YZ250 2-stroke engines that demand reliability under sustained high RPM operation. Factory OEM pistons wear quickly under racing conditions—this kit's 4032 T6 forged aluminum and permanent skirt coating...09104878- SKU:
- 09104878
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- DISPLACEMENT:
- 249 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE SIZE METRIC:
- 66.41 MM
- PISTON SIZE METRIC:
- 66.36 MM
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$152.00 -
Wossner Piston Kit 71.94mm KTM 300 EXC 2004-2005 8219DA
WOSSNER
$192.00When you're pushing a 2-stroke to its limits, a worn or stock piston becomes your weakest link. The Wossner 8219DA delivers the reliability and efficiency you need to maintain peak power delivery and engine longevity, whether you're racing cross-country...09104880- SKU:
- 09104880
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249 CC
- RIDING STYLE:
- STREET
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 71.94 MM
- UNITS:
- KIT
- DISPLACEMENT:
- 293 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$192.00 -
Wossner Piston Kit 71.95mm KTM 300 EXC 2004-2005 8219DB
WOSSNER
$192.00If you're running a KTM 300 EXC at the edge of performance, your piston is your most critical wear item. The Wossner 8219DB delivers the durability and efficiency required for sustained high-RPM operation, reducing friction losses and extending rebuild...09104881- SKU:
- 09104881
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 71.95 MM
- BORE SIZE METRIC:
- 72.01 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- DUAL RING
- BORE - OVERSIZE METRIC:
- +0.01 MM
- DISPLACEMENT:
- 293 CC
$192.00Qty in Cart: 0Quantity:Price:$192.00Subtotal: -
Wossner Piston Kit 53.95mm 2014-2025 Husqvarna TC125 8220DA
WOSSNER
$122.00When you're pushing a TC125 to its limits, your piston becomes the critical link between combustion and power delivery. The Wössner 8220DA keeps that link strong with purpose-built engineering that handles the thermal stress and repetitive load cycles...09104884- SKU:
- 09104884
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE METRIC:
- 54.00 MM
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.95 MM
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
$122.00 -
Wossner Piston Kit 53.96mm 2007-2023 KTM 125 SX 8220DB
WOSSNER
$122.00When your 2-stroke engine demands reliability under sustained high-load conditions, OEM pistons fall short of the mark. The Wössner 8220DB delivers the durability and reduced friction that separates competitive edge from engine failure, using...09104885- SKU:
- 09104885
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,01 MM
- BORE - OVERSIZE METRIC:
- +0.01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 54.01 MM
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 53.96 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$122.00 -
Wossner 85.93mm Piston Kit Kawasaki KX500 1988-2004 8228DA
WOSSNER
$192.00The Wossner 85.93mm Piston Kit is engineered for KX500 2-stroke engines that demand reliability through extended competition seasons and high-RPM abuse. A complete top-end refresh with Wossner's German-precision forging ensures your engine maintains...09104889- SKU:
- 09104889
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- DISPLACEMENT:
- 499 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 86.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 85.93 MM
$192.00 -
Wossner Piston Kit for KTM 65 SX 2009-2025 8241DA
WOSSNER
$102.00If you're running a KTM 65 SX and serious about consistent power delivery across repeated heat cycles, a quality piston kit is non-negotiable. The Wossner 8241DA replaces worn pistons that cause compression loss, increased blowby, and unpredictable...09104890- SKU:
- 09104890
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE SIZE METRIC:
- 45.02 MM
- DISPLACEMENT:
- 64 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 44.96 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$102.00 -
Wossner Piston Kit 45.03mm for KTM 65 SX 2009-2025 Husqvarna TC65 2017-2025 GasGas MC65 2021-2025 8241DB
WOSSNER
$102.00The Wossner Piston Kit 8241DB delivers the precision engineering and durability demanded by serious 2-stroke racers and mechanics. Factory OEM pistons wear quickly under high RPM loads—this German-engineered kit extends engine life while maintaining the...09104891- SKU:
- 09104891
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 45.03 MM
- TYPE:
- SINGLE RING
- DISPLACEMENT:
- 64 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 44.97 MM
- RIDING STYLE:
- OFF-ROAD
$102.00 -
Wossner Piston Kit Honda CR125R 1985-1986 8127DA
WOSSNER
$132.00If you're rebuilding a CR125R or pushing your engine harder, piston longevity and ring seal integrity directly impact reliability and power delivery. The Wossner 8127DA delivers German-engineered precision with a complete installation package,...09105542- SKU:
- 09105542
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 123 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 54.00 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- PISTON SIZE METRIC:
- 53.94 MM
$132.00 -
Wossner Piston Kit Kawasaki KX250 1987-1989 67.35mm 8129DB
WOSSNER
$162.00Two-stroke engines demand pistons engineered for extreme combustion pressures and rapid cycling—stock components simply can't handle sustained high-RPM performance. The Wossner 8129DB delivers the durability and precision your KX250 needs to stay...09105545- SKU:
- 09105545
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- BORE SIZE METRIC:
- 67.41 MM
- UNITS:
- KIT
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 67.35 MM
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +0.01 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,01 MM
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
$162.00Qty in Cart: 0Quantity:Price:$162.00Subtotal: -
Wossner Piston Kit Yamaha YZ250 1988-1991 8134D150
WOSSNER
$182.00If you're running a YZ250 two-stroke and want reliable power without sacrificing durability, a quality piston kit is non-negotiable. The Wossner 8134D150 delivers the precision engineering and material science that separates a dependable motor from one...09105549- SKU:
- 09105549
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- BORE - OVERSIZE METRIC:
- +1.50 MM
- DISPLACEMENT:
- 246 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 69.50 MM
- PISTON SIZE METRIC:
- 69.44 MM
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- +1,50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$182.00 -
Wrench Rabbit Engine Rebuild Kit for KTM 50 SX 2009-2012 WR101-158
WRENCH RABBIT
$683.95A two-stroke engine rebuild demands precision components that won't compromise performance or reliability. The Wrench Rabbit Engine Rebuild Kit for KTM 50 SX delivers everything you need in one package—eliminating guesswork and ensuring your engine runs...09031259- SKU:
- 09031259
- Availability:
- Ships Same Business Day
- Weight:
- 5.70 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$683.95
