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
-
JE PISTONS Piston Kit 379029
JE PISTONS
$314.99When you're pushing your engine to the limit, stock pistons are a liability. JE PISTONS' 379029 kit delivers the reliability and precision engineering demanded by professional racing and extreme high-performance builds—engineered to withstand the...09106390- SKU:
- 09106390
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- BORE SIZE METRIC:
- 78.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.1:1
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$314.99 -
JE PISTONS Piston Kit 284667
JE PISTONS
$329.99When you're pushing your engine to the limit in professional competition, your pistons need to survive extreme pressures and temperatures without compromise. JE Pistons' 284667 Kit delivers the precision engineering and materials science required for...09105890- SKU:
- 09105890
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- FORGED SIDE RELIEF DESIGN
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- PRO SERIES
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$329.99 -
JE PISTONS Piston Kit 274759
JE PISTONS
$309.99When you're pushing your engine to the limit in competition, your pistons need to deliver reliability without compromise. JE PISTONS' Pro Series 274759 kit is engineered for extreme applications with internal and external bracing that handles sustained...09105888- SKU:
- 09105888
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- BORE - OVERSIZE:
- +4,00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- PISTON HEAD SHAPE:
- FLAT TOP
- STYLE:
- JE PISTON
- TYPE:
- FORGED SIDE RELIEF DESIGN
- UNITS:
- KIT
- BORE SIZE METRIC:
- 100.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 488 CC
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +4.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
$309.99Qty in Cart: 0Quantity:Price:$309.99Subtotal: -
JE PISTONS Piston Kit 274756
JE PISTONS
$309.99When you're pushing your engine to the absolute limit, stock pistons won't cut it. JE PISTONS' Pro Series 274756 kit is engineered for extreme competition applications where reliability and performance are non-negotiable. These 2618-T6 forgings deliver...09105887- SKU:
- 09105887
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- PISTON HEAD SHAPE:
- DOMED
- STYLE:
- JE PISTON
- TYPE:
- FORGED SIDE RELIEF DESIGN
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
$309.99Qty in Cart: 0Quantity:Price:$309.99Subtotal: -
JE PISTONS Piston Kit 274755
JE PISTONS
$309.99When you're pushing your engine to the absolute limit in professional competition, your pistons need to survive extreme pressures and temperatures without compromise. JE PISTONS' Pro Series 274755 kit is engineered specifically for forced induction and...09105886- SKU:
- 09105886
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- FORGED SIDE RELIEF DESIGN
- DISPLACEMENT:
- 449 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- JE PISTON
- BORE - OVERSIZE METRIC:
- STANDARD
$309.99Qty in Cart: 0Quantity:Price:$309.99Subtotal: -
JE PISTONS Piston Kit 247940
JE PISTONS
$299.99When you're pushing an engine to its absolute limits in competition, your pistons need to survive extreme pressure, heat, and RPM without compromise. JE PISTONS' Pro Series 247940 kit delivers the precision engineering and material science required for...09105858- SKU:
- 09105858
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- BORE - OVERSIZE METRIC:
- +3.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- DISPLACEMENT:
- 270 CC
- PISTON HEAD SHAPE:
- DISHED
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE SIZE METRIC:
- 80.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- JE PISTON
- TYPE:
- FORGED SIDE RELIEF DESIGN
- BORE - OVERSIZE:
- +3,00 MM
- RIDING STYLE:
- OFF-ROAD
$299.99 -
JE PISTONS Piston Kit 247937
JE PISTONS
$309.99When you're pushing your engine to the absolute limit in competition, stock pistons won't cut it—you need components engineered specifically for extreme duty. JE PISTONS' Pro Series 247937 kit delivers the strength, precision, and weight savings that...09105857- SKU:
- 09105857
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STYLE:
- JE PISTON
- TYPE:
- FORGED SIDE RELIEF DESIGN
- BORE SIZE METRIC:
- 77.00 MM
$309.99Qty in Cart: 0Quantity:Price:$309.99Subtotal: -
JE PISTONS Piston Kit 199656
JE PISTONS
$309.99When you're pushing your engine to the absolute limit in competition, your pistons need to withstand extreme pressures without compromise. JE PISTONS' Pro Series 199656 kit delivers the precision engineering and material science required for...09105829- SKU:
- 09105829
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- BORE - OVERSIZE:
- +2,00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- RIDING STYLE:
- ATV
- BORE - OVERSIZE METRIC:
- +2.00 MM
- DISPLACEMENT:
- 415 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- JE PISTON
- BORE SIZE METRIC:
- 87.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- ROUND FORGED DESIGN
$309.99Qty in Cart: 0Quantity:Price:$309.99Subtotal: -
Wossner Piston Kit 46.95mm Honda CR80R 1992-2002 8237DA
WOSSNER
$112.00When you're pushing a CR80R to its limits, stock pistons become the weak link. The Wossner 8237DA replaces worn or damaged pistons with a precision-engineered component that delivers measurable gains in reliability and throttle response. Built with...09105581- SKU:
- 09105581
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- DISPLACEMENT:
- 80 CC
- PISTON SIZE METRIC:
- 46.95 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 47.00 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$112.00 -
Wossner Piston Kit 47.45mm Yamaha PW80 1983-2006 8233D050
WOSSNER
$112.00If you're running a PW80 at the track or pushing it hard on the trail, piston failure isn't an option. The Wossner 8233D050 kit delivers the durability and precision you need to keep your 2-stroke reliable through countless heat cycles and high-load...09105579- SKU:
- 09105579
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 47.50 MM
- DISPLACEMENT:
- 79 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SINGLE RING
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PISTON SIZE METRIC:
- 47.45 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$112.00Qty in Cart: 0Quantity:Price:$112.00Subtotal: -
Wossner Piston Kit KTM 125 2007-2025 8210DA
WOSSNER
$132.00When a 2-stroke engine is pushed hard—whether on the track or the trail—factory pistons wear quickly and performance suffers. The Wössner Piston Kit 8210DA replaces worn components with German-engineered precision, restoring compression, reducing...09105577- SKU:
- 09105577
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- BORE SIZE METRIC:
- 56.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 124 CC
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- PISTON SIZE METRIC:
- 55.94 MM
- TYPE:
- DUAL RING
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$132.00Qty in Cart: 0Quantity:Price:$132.00Subtotal: -
Wossner Piston Kit Kawasaki KX250 1978-1986 8203DA
WOSSNER
$152.00The Wossner 8203DA piston kit is engineered to restore or upgrade your KX250's top-end with OEM-quality reliability and measurable performance gains. A complete, bolt-together solution that eliminates guesswork—piston, rings, pin, and clips arrive ready...09105575- SKU:
- 09105575
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 70.00 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 69.94 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- DUAL RING
$152.00Qty in Cart: 0Quantity:Price:$152.00Subtotal: -
Wossner Piston Kit 1984-1985 Kawasaki KX80 8201DA
WOSSNER
$122.00Your KX80's performance depends on precision internal components that can withstand the extreme temperatures and pressures of 2-stroke combustion. The Wossner 8201DA piston kit delivers German engineering and proven durability, giving you the reliability...09105574- SKU:
- 09105574
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 48.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 47.95 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 82 CC
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
VERTEX Piston Kit 24220A
VERTEX
$269.95The VERTEX Piston Kit 24220A delivers the reliability and performance characteristics your engine demands, whether you're running a high-revving two-stroke or a demanding four-stroke application. VERTEX's engineering approach—combining precision heat...09105189- SKU:
- 09105189
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
- PISTON DIAMETER METRIC:
- 76.95 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 13.7:1
- DISPLACEMENT:
- 250 CC
$269.95 -
VERTEX Piston Kit 24244C
VERTEX
$251.95Whether you're rebuilding a two-stroke or four-stroke engine, the VERTEX Piston Kit 24244C delivers the precision and durability required for consistent performance across the entire RPM range. VERTEX's advanced metallurgy and manufacturing...09105169- SKU:
- 09105169
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- CAST
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- CYLINDER DIAMETER METRIC:
- 72.00 MM
- DISPLACEMENT:
- 300 CC
- PISTON DIAMETER METRIC:
- 71.945 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$251.95 -
VERTEX Piston Kit 24244A
VERTEX
$254.95The VERTEX Piston Kit 24244A delivers the durability and precision your engine demands, whether you're chasing lap times or rebuilding a tired top end. Built with forged 2618 aluminum and engineered for strength across the RPM range, this kit ensures...09105167- SKU:
- 09105167
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- CYLINDER DIAMETER METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 71.925 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 300 CC
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$254.95 -
VERTEX Piston Kit 24212C
VERTEX
$136.95The VERTEX Piston Kit 24212C delivers the durability and performance precision you need for serious engine builds. Whether you're rebuilding a two-stroke or four-stroke, this kit provides OEM-quality components engineered to withstand extreme combustion...09105165- SKU:
- 09105165
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CYLINDER DIAMETER METRIC:
- 47.00 MM
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 46.96 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- PRODUCT NAME:
- PISTON KIT
$136.95Qty in Cart: 0Quantity:Price:$136.95Subtotal: -
VERTEX Piston Kit 24212B
VERTEX
$136.95A quality piston kit is the foundation of reliable top-end performance—whether you're rebuilding after wear or upgrading for increased displacement and power. The VERTEX Piston Kit 24212B delivers precision-engineered components with forged 2618 aluminum...09105164- SKU:
- 09105164
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 85 CC
- PISTON DIAMETER METRIC:
- 46.95 MM
- PISTON MATERIAL:
- CAST
- STYLE:
- CAST REPLICA
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 47.00 MM
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$136.95 -
VERTEX Piston Kit 24212A
VERTEX
$137.95Whether you're rebuilding a two-stroke or four-stroke engine, piston quality directly impacts reliability, power delivery, and longevity under load. The VERTEX Piston Kit 24212A delivers OEM-grade performance with forged and cast options engineered for...09105163- SKU:
- 09105163
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 47.00 MM
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 46.94 MM
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- PRODUCT NAME:
- PISTON KIT
$137.95 -
VERTEX Piston Kit 24243C
VERTEX
$164.95The VERTEX Piston Kit 24243C delivers the durability and precision your engine demands, whether you're chasing lap times or rebuilding a worn top end. Built with forged or cast options and finished with molybdenum disulfide coating, these pistons...09105161- SKU:
- 09105161
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- DISPLACEMENT:
- 125 CC
- PISTON DIAMETER METRIC:
- 53.96 MM
- STYLE:
- CAST RACE
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
$164.95
