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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MOOSE RACING Piston Kit MSE24384B
MOOSE RACING
$191.95Engine longevity depends on reliable piston performance, especially in high-demand applications where thermal stress and friction accelerate wear. The MOOSE RACING Piston Kit MSE24384B delivers gravity-cast construction engineered to withstand extreme...09106021- SKU:
- 09106021
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- UNITS:
- KIT
- PISTON DIAMETER METRIC:
- 66.36 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
$191.95 -
MOOSE RACING Piston Kit MSE24385B
MOOSE RACING
$154.95Factory pistons wear out—especially under high RPM or forced induction conditions. The MOOSE RACING Piston Kit MSE24385B combines gravity-cast aluminum with 18% silicon content to dramatically reduce thermal distortion and extend service life, while...09106023- SKU:
- 09106023
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- PISTON DIAMETER METRIC:
- 71.96 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
$154.95Qty in Cart: 0Quantity:Price:$154.95Subtotal: -
MOOSE RACING Ring Set - For 96 mm Piston CP9600C
MOOSE RACING
$35.95A precision ring set is critical to maintaining proper compression, oil control, and engine longevity in high-performance applications. The MOOSE RACING Ring Set for 96 mm pistons delivers OEM-quality sealing with tight tolerances, ensuring consistent...09120602- SKU:
- 09120602
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$35.95 -
MOOSE RACING Ring Set - For 95 mm Piston CP9500C
MOOSE RACING
$35.95A precision ring set engineered for serious competitors running high-compression builds with the CP9500C piston. Proper ring sealing is critical for peak cylinder pressure, combustion efficiency, and long-term engine durability—this ring set delivers the...09120603- SKU:
- 09120603
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
$35.95 -
MOOSE RACING Ring Set - For 90 mm Piston CPN2-3543
MOOSE RACING
$35.95A quality ring set is fundamental to engine reliability and performance—it's what seals combustion pressure and controls oil consumption in your cylinder. The MOOSE RACING Ring Set for 90 mm pistons delivers precise fitment and proven durability,...09120333- SKU:
- 09120333
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
- UNITS:
- SET
$35.95Qty in Cart: 0Quantity:Price:$35.95Subtotal: -
MOOSE RACING Connecting Rod MR13187
MOOSE RACING
$474.95A connecting rod is the critical link between your piston and crankshaft—it must be strong enough to handle peak combustion forces while light enough to minimize parasitic drag on engine response. The MOOSE RACING MR13187, developed in partnership with...09230621- SKU:
- 09230621
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- PRODUCT NAME:
- CONNECTING ROD
- STYLE:
- HIGH PERFORMANCE
- MATERIAL:
- PROPRIETARY ALLOY
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$474.95 -
MOOSE RACING Piston Kit - 66.36 mm MSE22521B
MOOSE RACING
$203.65A piston kit engineered for durability and extended service life, the MOOSE RACING MSE22521B combines gravity-cast aluminum with 18% silicon content to resist wear and thermal distortion under demanding conditions. Whether you're rebuilding after...09102679- SKU:
- 09102679
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PISTON DIAMETER METRIC:
- 66.36 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$203.65 -
MOOSE RACING Cylinder - Standard MSECW20013
MOOSE RACING
$364.95A worn or damaged cylinder compromises compression, efficiency, and overall engine reliability—especially under racing conditions. The MOOSE RACING Standard Cylinder restores your engine to OEM performance specifications with precision engineering and a...09310968- SKU:
- 09310968
- Availability:
- Ships Same Business Day
- Weight:
- 2.51 LBS
- BORE SIZE METRIC:
- STANDARD
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- DISPLACEMENT:
- 250 CC
- MATERIAL:
- ALUMINUM
- COLOR/FINISH:
- GRAY
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- CAST
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- UNITS:
- EACH
- CYLINDER DIAMETER:
- 77,00 MM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
$364.95 -
MOOSE RACING Cylinder - Standard - CRF250 MSECW10011
MOOSE RACING
$338.95When your CRF250 cylinder shows signs of wear—scoring, compression loss, or thermal stress—a direct OEM replacement restores the reliability and performance your engine demands. This MOOSE RACING cylinder delivers factory-spec precision without the...09310878- SKU:
- 09310878
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
$338.95 -
MOOSE RACING Intake Valve Kit M30-31200
MOOSE RACING
$217.95OEM intake valves wear out—especially under sustained high-RPM operation. The MOOSE RACING Intake Valve Kit M30-31200 replaces them with stainless steel Black Diamond valves that deliver up to 4x longer service life while improving flow characteristics...09262427- SKU:
- 09262427
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
$217.95 -
MOOSE RACING Intake Valve Kit M30-31230
MOOSE RACING
$196.95Extended valve life directly translates to reduced maintenance costs and more consistent performance over thousands of miles—critical for both race applications and high-demand street engines. MOOSE Racing's stainless steel Black Diamond intake valves...09262429- SKU:
- 09262429
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
$196.95 -
MOOSE RACING Intake Valve Kit M80-82350
MOOSE RACING
$196.95OEM titanium intake valves wear out and require frequent replacement—stainless steel conversion eliminates that cycle. The MOOSE RACING Black Diamond intake valves extend valve train life by up to 4x while delivering superior flow characteristics and...09263192- SKU:
- 09263192
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
$196.95 -
MOOSE RACING Valve and Spring Kit M80-82360
MOOSE RACING
$196.95Factory titanium intake valves wear faster and restrict flow potential in high-performance applications. The MOOSE RACING Valve and Spring Kit M80-82360 replaces them with stainless steel Black Diamond valves engineered to extend valve train life by up...09263193- SKU:
- 09263193
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
$196.95 -
MOOSE RACING Exhaust Valve Kit M30-33690
MOOSE RACING
$169.95Your intake valves are the gatekeepers of cylinder filling—and factory titanium components simply don't last through serious competition or high-mileage abuse. The MOOSE RACING Exhaust Valve Kit M30-33690 upgrades your cylinder head to stainless steel...09263304- SKU:
- 09263304
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
$169.95 -
MOOSE RACING Cylinder - Standard MSE20005
MOOSE RACING
$506.95A worn or damaged cylinder directly compromises combustion efficiency, heat management, and overall engine reliability. The MOOSE RACING Cylinder delivers OEM-equivalent performance with superior durability, ensuring consistent bore tolerances and a...09310454- SKU:
- 09310454
- Availability:
- Ships Same Business Day
- Weight:
- 3.43 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- MATERIAL:
- ALUMINUM
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- CAST
- UNITS:
- EACH
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
$506.95Qty in Cart: 0Quantity:Price:$506.95Subtotal: -
MOOSE RACING Cylinder - Standard MSE30001
MOOSE RACING
$380.95A worn or damaged cylinder compromises compression, increases friction, and accelerates wear on your piston rings and bearings. The MOOSE RACING MSE30001 restores OEM-spec performance with a durable, precision-machined replacement that dissipates heat...09310456- SKU:
- 09310456
- Availability:
- Ships Same Business Day
- Weight:
- 2.48 LBS
- MATERIAL:
- ALUMINUM
- MATERIAL:
- CAST
- UNITS:
- EACH
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
$380.95 -
MOOSE RACING Cylinder - Standard MSE30004
MOOSE RACING
$390.95A worn or damaged cylinder compromises compression, efficiency, and overall engine reliability—especially under racing conditions where precision is non-negotiable. The MOOSE RACING MSE30004 restores your engine to OEM specifications with a durable,...09310457- SKU:
- 09310457
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- MATERIAL:
- ALUMINUM
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- CAST
$390.95Qty in Cart: 0Quantity:Price:$390.95Subtotal: -
MOOSE RACING Cylinder - Standard MSE30006
MOOSE RACING
$390.95A worn or damaged cylinder compromises compression, throttle response, and overall engine reliability—especially under racing conditions where tolerances matter. The MOOSE RACING MSE30006 replaces your OEM cylinder with precision-engineered durability,...09310459- SKU:
- 09310459
- Availability:
- Ships Same Business Day
- Weight:
- 2.51 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$390.95 -
MOOSE RACING Cylinder - Standard MSE40001
MOOSE RACING
$407.95A worn or damaged cylinder is a bottleneck that compromises your entire engine's performance and reliability. The MOOSE RACING MSE40001 restores your engine to factory specifications with precision engineering and premium materials, giving you the...09310460- SKU:
- 09310460
- Availability:
- Ships Same Business Day
- Weight:
- 3.84 LBS
- UNITS:
- EACH
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- CAST
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- CYLINDER
- RIDING STYLE:
- OFF-ROAD
$407.95 -
MOOSE RACING Cylinder - Standard MSE40004
MOOSE RACING
$414.95A worn or damaged cylinder compromises compression, increases blowby, and degrades engine efficiency. The MOOSE RACING MSE40004 restores your engine to OEM performance specifications with a precision-machined bore and low-friction surface that dissipates...09310463- SKU:
- 09310463
- Availability:
- Ships Same Business Day
- Weight:
- 2.56 LBS
- MATERIAL:
- CAST
- PRODUCT NAME:
- CYLINDER
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
$414.95Qty in Cart: 0Quantity:Price:$414.95Subtotal:
