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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VERTEX Piston Circlips 72098K
VERTEX
$3.95Piston circlips are critical retention components that prevent piston pin movement during high-RPM operation. If your circlips are worn, damaged, or missing, you're risking catastrophic engine...09130112- SKU:
- 09130112
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- APPLICATION:
- PISTON
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CIRCLIP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
$3.95Qty in Cart: 0Quantity:Price:$3.95Subtotal: -
VERTEX Wrist Pin - CR/YZ/SX/KX/RM 711127
VERTEX
$11.50A wrist pin failure mid-race costs you time, money, and credibility. The VERTEX Wrist Pin delivers the wear resistance and reliability you need to keep your engine performing at peak output, lap...09130019- SKU:
- 09130019
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- APPLICATION:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- WRIST PIN
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$11.50 -
VERTEX Wrist Pin - CR/KX/YZ85 715378
VERTEX
$8.95Wrist pin failure in high-RPM two-stroke engines compromises combustion efficiency and can lead to catastrophic engine damage. The VERTEX 715378 wrist pin uses case-hardened construction with nitride...09130027- SKU:
- 09130027
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- APPLICATION:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- WRIST PIN
$8.95Qty in Cart: 0Quantity:Price:$8.95Subtotal: -
VERTEX Ring Set 590276000001
VERTEX
$83.95Piston ring wear is one of the most common causes of compression loss and power degradation in both two-stroke and four-stroke engines. The VERTEX Ring Set 590276000001 replaces worn rings with...09120209- SKU:
- 09120209
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON RING
- PISTON DIAMETER METRIC:
- 75.96 MM
$83.95 -
VERTEX Ring Set 590278000002
VERTEX
$87.10Piston ring wear is one of the most common causes of power loss and compression degradation in high-performance engines. The VERTEX Ring Set 590278000002 delivers factory-grade reliability with...09120213- SKU:
- 09120213
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- UNITS:
- SET
- PISTON DIAMETER METRIC:
- 77.96 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING
$87.10 -
VERTEX Ring Set 590377000001
VERTEX
$61.95Piston ring wear is one of the fastest paths to catastrophic engine failure—loss of compression, blow-by, and oil consumption compound rapidly once rings start to deteriorate. The VERTEX Ring Set...09120226- SKU:
- 09120226
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON DIAMETER METRIC:
- 76.94 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
$61.95Qty in Cart: 0Quantity:Price:$61.95Subtotal: -
VERTEX Piston Kit 23666A
VERTEX
$137.95The VERTEX Piston Kit 23666A delivers the reliability and performance you need for sustained high-RPM operation. Whether you're rebuilding after a failure or upgrading for increased displacement and...09105949- SKU:
- 09105949
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- CYLINDER DIAMETER METRIC:
- 48 MM
- DISPLACEMENT:
- 85 CC
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 47.87 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- CAST
$137.95 -
VERTEX Piston Kit 23666B
VERTEX
$123.95Whether you're rebuilding a two-stroke or refreshing a four-stroke engine, the VERTEX Piston Kit 23666B delivers the strength and precision required for reliable performance across demanding riding...09105950- SKU:
- 09105950
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PISTON DIAMETER METRIC:
- 47.88 MM
- PRODUCT NAME:
- PISTON KIT
- CYLINDER DIAMETER METRIC:
- 48 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- UNITS:
- KIT
$123.95 -
VERTEX Piston Kit 23654B
VERTEX
$289.95Whether you're rebuilding a tired engine or pursuing peak performance, the VERTEX Piston Kit 23654B delivers the durability and precision required for demanding applications. These pistons combine...09102060- SKU:
- 09102060
- Availability:
- Ships Same Business Day
- Weight:
- 0.64 LBS
- BORE - OVERSIZE:
- +3,00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- DISPLACEMENT:
- 270 CC
- STYLE:
- FORGED BIG BORE
- BORE - OVERSIZE METRIC:
- +3.00 MM
- PISTON DIAMETER METRIC:
- 79.96 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$289.95 -
VERTEX Piston Kit - Standard 22652B
VERTEX
$184.95Maximum power output demands pistons engineered for extreme conditions—the VERTEX Standard 22652B delivers the durability and precision required for serious racing and high-performance builds. Built...09100945- SKU:
- 09100945
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- DISPLACEMENT:
- 125 CC
- PISTON DIAMETER METRIC:
- 53.96 MM
$184.95 -
VERTEX Piston Kit 22998B
VERTEX
$184.95When you're pushing your engine to its limits, piston failure isn't an option—it's a catastrophe. The VERTEX Piston Kit 22998B delivers the durability and precision you need to maintain peak...09100946- SKU:
- 09100946
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- PISTON DIAMETER METRIC:
- 53.96 MM
- STYLE:
- CAST REPLICA
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- DISPLACEMENT:
- 125 CC
$184.95Qty in Cart: 0Quantity:Price:$184.95Subtotal: -
VERTEX Piston Kit - Standard 22386B
VERTEX
$230.95Precision-engineered pistons are the foundation of reliable, high-output engine performance—and the VERTEX Piston Kit 22386B delivers the durability and consistency your build demands. Built with...09100948- SKU:
- 09100948
- Availability:
- Ships Same Business Day
- Weight:
- 0.72 LBS
- PISTON DIAMETER METRIC:
- 66.35 MM
- STYLE:
- CAST REPLICA
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$230.95 -
VERTEX Piston Kit - Standard 22854B
VERTEX
$230.95Pistons are the hardworking heart of your engine, and their durability directly impacts reliability and longevity under sustained performance demands. The VERTEX Piston Kit 22854B delivers...09100952- SKU:
- 09100952
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- DISPLACEMENT:
- 250 CC
- PISTON DIAMETER METRIC:
- 66.35 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- STYLE:
- CAST REPLICA
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$230.95Qty in Cart: 0Quantity:Price:$230.95Subtotal: -
VERTEX Piston Kit 22982B
VERTEX
$256.95The VERTEX Piston Kit 22982B delivers the durability and precision your engine demands, whether you're pushing peak horsepower on the track or rebuilding after serious wear. Engineered with T-5...09100953- SKU:
- 09100953
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
$256.95 -
VERTEX Piston Kit - Standard 22500A
VERTEX
$122.95Building a high-revving engine demands pistons engineered for extreme conditions. The VERTEX Piston Kit 22500A delivers the durability and precision needed to handle sustained boost, aggressive...09100960- SKU:
- 09100960
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 47.00 MM
- DISPLACEMENT:
- 80 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 46.95 MM
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
$122.95Qty in Cart: 0Quantity:Price:$122.95Subtotal: -
VERTEX Piston Kit - Standard 22441B
VERTEX
$148.95Building a high-revving engine demands pistons engineered for reliability under extreme conditions. The VERTEX Piston Kit 22441B delivers the durability and precision you need to maximize power...09100963- SKU:
- 09100963
- Availability:
- Ships Same Business Day
- Weight:
- 0.39 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 53.94 MM
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- STYLE:
- CAST REPLICA
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- DISPLACEMENT:
- 125 CC
$148.95Qty in Cart: 0Quantity:Price:$148.95Subtotal: -
VERTEX Piston Kit - Standard 22520B
VERTEX
$171.95Precision-engineered pistons are the foundation of reliable high-RPM performance, and the VERTEX Piston Kit 22520B delivers the durability and consistency your engine demands. Whether you're pushing...09100964- SKU:
- 09100964
- Availability:
- Ships Same Business Day
- Weight:
- 0.39 LBS
- PISTON DIAMETER METRIC:
- 53.94 MM
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 125 CC
- STYLE:
- CAST REPLICA
$171.95Qty in Cart: 0Quantity:Price:$171.95Subtotal: -
VERTEX Piston Kit - Standard 23119B
VERTEX
$156.95Precision-engineered pistons are the foundation of reliable engine performance, especially under sustained high RPM and boost conditions. The VERTEX Piston Kit 23119B delivers the durability and...09100966- SKU:
- 09100966
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- DISPLACEMENT:
- 125 CC
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- STYLE:
- CAST REPLICA
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 53.94 MM
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$156.95 -
VERTEX Piston Kit - Standard 22154B
VERTEX
$208.95Pistons are the engine's hardest-working components—they need to survive extreme combustion pressures, temperature swings, and constant acceleration cycles. The VERTEX Piston Kit 22154B delivers the...09100968- SKU:
- 09100968
- Availability:
- Ships Same Business Day
- Weight:
- 0.73 LBS
- CYLINDER DIAMETER METRIC:
- 68.00 MM
- DISPLACEMENT:
- 250 CC
- PISTON DIAMETER METRIC:
- 67.95 MM
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
$208.95Qty in Cart: 0Quantity:Price:$208.95Subtotal: -
VERTEX Piston Kit 22584B
VERTEX
$183.95The VERTEX Piston Kit 22584B delivers the reliability and performance precision you need for demanding engine builds. Whether you're upgrading displacement, increasing compression, or simply...09100970- SKU:
- 09100970
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- COMPRESSION RATIO IMPERIAL:
- 13.4:1
- DISPLACEMENT:
- 250 CC
- PISTON DIAMETER METRIC:
- 66.35 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$183.95
