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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WORKS CONNECTION Dipstick - Red - CRF250R 24-246
WORKS CONNECTION
$46.95Stock dipsticks are prone to bending and breaking during aggressive riding or maintenance work, leaving you with inaccurate oil readings or a damaged tube. The WORKS CONNECTION Dipstick replaces that weak link with precision-machined billet aluminum that...09500319- SKU:
- 09500319
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- BASE COLOR:
- RED
- PRODUCT NAME:
- DIPSTICK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- RED
- TYPE:
- ENGINE
$46.95Qty in Cart: 0Quantity:Price:$46.95Subtotal: -
Wossner Connecting Rod Suzuki RM250 1986-1995 P2027
WOSSNER
$122.00A connecting rod rebuild is critical to engine longevity and reliability—especially in high-rev 2-stroke applications where tolerances are tight and demands are extreme. The Wössner P2027 is engineered with 8620 forged alloy and shot-peened construction...09230412- SKU:
- 09230412
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- STYLE:
- STANDARD
$122.00 -
Wossner Connecting Rod Yamaha YZ250 1999-2025 P2028
WOSSNER
$122.00The Wössner Connecting Rod for your YZ250 is engineered to handle the extreme demands of 2-stroke racing without compromise. Whether you're rebuilding after a season of hard use or upgrading to factory-spec components, this German-manufactured rod...09230413- SKU:
- 09230413
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
$122.00 -
Wossner Connecting Rod Yamaha YZ250 1990-1998 P2029
WOSSNER
$122.00If you're rebuilding a YZ250 engine, the crankshaft is your foundation—and a quality connecting rod is non-negotiable. Wössner's P2029 rod is forged from 8620 alloy and shot-peened for strength, giving you the durability and reliability that serious...09230414- SKU:
- 09230414
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- STYLE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Connecting Rod Kit for Suzuki LT-R450 2006-2009 P4011
WOSSNER
$174.00If you're rebuilding the bottom end of your LT-R450, the Wössner Connecting Rod Kit P4011 is the precision component that determines whether your engine will deliver consistent power or fail prematurely under load. Built from 8620 forged alloy and...09230437- SKU:
- 09230437
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- STYLE:
- STANDARD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- ATV
$174.00Qty in Cart: 0Quantity:Price:$174.00Subtotal: -
Wossner Connecting Rod Yamaha YFM700 Raptor 2006-2025 P4031
WOSSNER
$204.00Whether you're rebuilding a high-mileage engine or pushing your Raptor to its limits, a worn or damaged connecting rod compromises both power delivery and engine longevity. The Wossner P4031 is engineered to restore—or exceed—OEM performance with forged...09230445- SKU:
- 09230445
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- RIDING STYLE:
- UTV
- STYLE:
- STANDARD
$204.00 -
Wossner Connecting Rod Suzuki RM125 1997-1998 P2014
WOSSNER
$122.00If you're rebuilding the bottom end on your RM125, a quality connecting rod is non-negotiable—it's the link between your piston and crankshaft that bears the brunt of combustion forces and inertial loads. The Wossner P2014 is engineered to OEM...09230456- SKU:
- 09230456
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Connecting Rod Kit for Honda TRX450R 2006-2009 P4023
WOSSNER
$174.00If you're rebuilding a TRX450R engine or pushing it to its limits, factory connecting rods become a liability. The Wossner P4023 kit delivers the strength and precision needed for high-rpm reliability, combining 8620 forged construction with shot peening...09230457- SKU:
- 09230457
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- STYLE:
- STANDARD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- ATV
$174.00 -
Wossner Piston Kit Honda CRF250R 2020-2024 8967DB
WOSSNER
$214.00When your CRF250R demands maximum durability and efficiency, factory pistons fall short of what serious riders need. The Wossner 8967DB delivers the precision engineering and advanced materials required to maintain peak performance through demanding...09106117- SKU:
- 09106117
- Availability:
- Ships Same Business Day
- Weight:
- 0.52 LBS
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- +0.01 MM
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 78.97 MM
- PRODUCT NAME:
- PISTON KIT
- MODEL:
- PREMIUM SERIES
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 79.01 MM
- UNITS:
- KIT
$214.00Qty in Cart: 0Quantity:Price:$214.00Subtotal: -
Wossner Piston Kit Husqvarna TC 510 2006-2009 Standard 8652DA
WOSSNER
$234.00The Wossner Piston Kit for your Husqvarna TC 510 delivers the reliability and performance your machine demands, whether you're pushing limits on the track or tackling technical terrain. A complete piston assembly from a trusted German manufacturer means...09106118- SKU:
- 09106118
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- BORE SIZE METRIC:
- 97.00 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- PISTON SIZE METRIC:
- 96.95 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PRO SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$234.00Qty in Cart: 0Quantity:Price:$234.00Subtotal: -
Wossner Piston Kit Husqvarna TC 510 2006-2009 96.96mm 8652DB
WOSSNER
$234.00A worn or damaged piston directly kills engine performance and reliability—and replacing it with a substandard part only delays the problem. The Wossner Piston Kit for your Husqvarna TC 510 is engineered to OEM specifications with materials and precision...09106119- SKU:
- 09106119
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
- BORE - OVERSIZE:
- +0,01 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 96.96 MM
- BORE SIZE METRIC:
- 97.01 MM
- MODEL:
- PRO SERIES
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.01 MM
$234.00Qty in Cart: 0Quantity:Price:$234.00Subtotal: -
Wossner Piston Kit Yamaha YZ450F 2010-2013 12.5:1 CR 8776DA
WOSSNER
$204.00The Wossner Piston Kit delivers the durability and precision your YZ450F demands, whether you're pushing hard at the track or logging hours in the dirt. Factory pistons wear, lose compression, and rob you of throttle response—this complete kit restores...09106121- SKU:
- 09106121
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 97.00 MM
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 96.96 MM
$204.00Qty in Cart: 0Quantity:Price:$204.00Subtotal: -
Wossner Piston Kit Yamaha YZ450F 2010-2013 12.5:1 8776DB
WOSSNER
$204.00Engine wear and heat stress are the primary culprits behind power loss and reliability issues in high-performance 4-strokes. The Wossner Piston Kit for your YZ450F addresses both with precision-engineered components that restore combustion efficiency,...09106122- SKU:
- 09106122
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 96.97 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 97.01 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
$204.00 -
Wossner Piston Kit Yamaha YFZ450R 2009-2025 12.5:1 CR 8784DA
WOSSNER
$204.00When you're pushing the YFZ450R to its limits, factory pistons become your weak link. The Wossner 8784DA is purpose-built to handle the demands of high-RPM riding while delivering measurable gains in reliability and throttle response. This is the piston...09106123- SKU:
- 09106123
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- BORE SIZE METRIC:
- 95.00 MM
- PISTON SIZE METRIC:
- 94.95 MM
- BORE - OVERSIZE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.3:1
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- COMPRESSION RATIO IMPERIAL:
- 12.6:1
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PRO SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- ATV
$204.00 -
Wossner Piston Kit KTM 450 SX-F 2013-2022 8868DA
WOSSNER
$214.00Stock pistons are the weak link in high-performance 450 applications—especially when you're pushing near redline on a regular basis. The Wössner 8868DA is engineered to withstand the extreme combustion pressures and thermal cycling that separates casual...09106124- SKU:
- 09106124
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE SIZE METRIC:
- 95.00 MM
- PISTON SIZE METRIC:
- 94.95 MM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.6:1
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PREMIUM SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
$214.00Qty in Cart: 0Quantity:Price:$214.00Subtotal: -
Wossner Piston Kit KTM 450 SX-F 2013-2023 94.95mm 8873DA
WOSSNER
$244.00A high-performance piston kit is the foundation of reliable top-end durability and consistent power delivery in your KTM 450 SX-F. The Wossner 8873DA combines German engineering with proven materials science to eliminate piston rock, reduce friction...09106125- SKU:
- 09106125
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 95.00 MM
- PISTON SIZE METRIC:
- 94.95 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 13.6:1
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PRO SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
$244.00 -
Wossner Piston Kit Husqvarna FC250 2016-2022 8923DA
WOSSNER
$224.00When you're pushing your FC250 to the limit, a stock piston won't cut it. The Wössner Piston Kit delivers the durability and precision your engine demands, combining German engineering with race-proven materials to keep power consistent lap after lap...09106134- SKU:
- 09106134
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- BORE SIZE METRIC:
- 78.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.4:1
- PISTON SIZE METRIC:
- 77.96 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- MODEL:
- PREMIUM SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$224.00 -
Wossner Piston Kit KTM 350 EXC-F 2017-2019 Husqvarna FE350 2017-2019 12.5:1 CR 8941DB
WOSSNER
$214.00When your KTM 350 EXC-F or Husqvarna FE350 is pushing hard on the track or trail, piston reliability becomes non-negotiable. This Wossner piston kit delivers the durability and precision engineering needed to withstand high-load conditions while reducing...09106136- SKU:
- 09106136
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- BORE SIZE METRIC:
- 88.01 MM
- PISTON SIZE METRIC:
- 87.96 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PRO SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
$214.00 -
Wossner Piston Kit Yamaha YZ250F 2019-2025 8957DA
WOSSNER
$184.00The stock piston in your YZ250F won't cut it if you're pushing hard on the track or trail. Wossner pistons are engineered for high-load durability and reduced friction, giving you reliable power delivery lap after lap. This complete kit gives you...09106138- SKU:
- 09106138
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE SIZE METRIC:
- 77.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- MODEL:
- PREMIUM SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 76.96 MM
$184.00 -
Wossner Piston Kit Yamaha YZ250F 2019-2025 8957DB
WOSSNER
$184.00The Wossner Piston Kit delivers the durability and precision needed to keep your YZ250F running strong through aggressive riding and repeated heat cycles. Built with German engineering and advanced metallurgy, this complete kit eliminates guesswork...09106139- SKU:
- 09106139
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- BORE SIZE METRIC:
- 77.01 MM
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- MODEL:
- PREMIUM SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 76.97 MM
$184.00
