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 Kit VTK23375B-1
VERTEX
$302.95A quality piston kit is the foundation of engine reliability and performance—especially under high boost or sustained RPM conditions. The VERTEX Piston Kit VTK23375B-1 delivers the durability and...09103107- SKU:
- 09103107
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- PISTON DIAMETER METRIC:
- 71.95 MM
- PRODUCT NAME:
- TOP END PISTON KIT
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 72.00 MM
- DISPLACEMENT:
- 300 CC
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- STYLE:
- CAST REPLICA
$302.95 -
VERTEX Piston Kit VTK22877B
VERTEX
$164.95VERTEX pistons are engineered for builders who demand reliability under extreme combustion pressures and sustained high RPM operation. The T-5 heat treatment process ensures superior hardness and...09103123- SKU:
- 09103123
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 48.00 MM
- PISTON DIAMETER METRIC:
- 47.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- TOP END PISTON KIT
$164.95 -
VERTEX Piston Kit VTK23119B
VERTEX
$201.95Precision-engineered pistons are the foundation of engine reliability and performance—especially in high-demand racing and forced-induction applications. The VERTEX Piston Kit VTK23119B delivers the...09103133- SKU:
- 09103133
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- PISTON DIAMETER METRIC:
- 53.94 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- TOP END PISTON KIT
$201.95 -
VERTEX Piston Circlips - KX/RM/SX65/85 72065K
VERTEX
$3.95When you're running a high-revving two-stroke engine, piston circlips are critical to keeping your piston rings seated and functioning properly. OEM-spec circlips ensure the precise clearances your...09130058- SKU:
- 09130058
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- UNITS:
- PAIR
- PRODUCT NAME:
- CIRCLIP
$3.95Qty in Cart: 0Quantity:Price:$3.95Subtotal: -
On Sale
VERTEX Piston Ring 50420004800
VERTEX
MSRP: $25.95Now: $17.00Was: $25.95Piston rings are critical wear items that directly impact compression, blow-by control, and oil consumption—making a quality replacement essential for maintaining peak engine performance and...09120842- SKU:
- 09120842
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
MSRP: $25.95Now: $17.00Was: $25.95Qty in Cart: 0Quantity:Price:MSRP: $25.95Now: $17.00Was: $25.95Subtotal: -
VERTEX Wrist Pin 711195
VERTEX
$53.95Wrist pin durability directly impacts engine longevity and reliability under sustained high-RPM loads. The VERTEX 711195 utilizes nitride coating technology to deliver superior wear resistance...09120470- SKU:
- 09120470
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- WRIST PIN
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
$53.95 -
VERTEX Piston Ring 590296000003
VERTEX
$85.00Worn or damaged piston rings directly compromise compression, increase blow-by, and rob your engine of power and efficiency. VERTEX piston rings restore proper cylinder sealing, reduce oil...09120342- SKU:
- 09120342
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$85.00 -
VERTEX Piston Ring 53010005250
VERTEX
$27.95Factory piston rings wear down with every combustion cycle, and degraded rings rob your engine of compression, power, and efficiency. VERTEX Piston Ring 53010005250 delivers the durability you need...09120343- SKU:
- 09120343
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PISTON SIZE METRIC:
- +2.00 MM
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 52.44 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$27.95Qty in Cart: 0Quantity:Price:$27.95Subtotal: -
VERTEX Piston Ring 53010005300
VERTEX
$25.95Piston rings are critical wear items that directly impact compression, blow-by control, and engine longevity. The VERTEX 53010005300 delivers extended service life through advanced surface coatings...09120344- SKU:
- 09120344
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 65.97 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$25.95 -
VERTEX Piston Ring 55910006640
VERTEX
$55.60Piston rings are critical wear items that directly impact engine compression, blow-by control, and longevity. The VERTEX Piston Ring 55910006640 delivers superior durability through advanced surface...09120347- SKU:
- 09120347
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PISTON DIAMETER METRIC:
- 66.35 MM
$55.60 -
VERTEX Piston Ring 590288000001
VERTEX
$87.10Piston rings are the hardworking seals between your pistons and cylinder walls—when they wear, you lose compression, power, and fuel efficiency. VERTEX Piston Ring 590288000001 combines modern...09120348- SKU:
- 09120348
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 87.96 MM
- RIDING STYLE:
- STREET
- UNITS:
- SET
$87.10 -
VERTEX Piston Ring 590210000001
VERTEX
$82.95Piston rings endure extreme pressure and temperature cycles—worn or substandard rings result in blow-by, lost compression, and accelerated engine degradation. The VERTEX Piston Ring 590210000001...09120297- SKU:
- 09120297
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- PISTON DIAMETER METRIC:
- 88.95 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
$82.95 -
VERTEX Piston Ring 590298000001
VERTEX
$85.00Piston rings are critical wear items that directly impact compression, blow-by control, and engine longevity. VERTEX Piston Ring 590298000001 delivers superior durability through advanced surface...09120313- SKU:
- 09120313
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- PISTON DIAMETER METRIC:
- 97.96 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$85.00 -
VERTEX Piston Ring 590310200002
VERTEX
$87.10Piston rings are one of the most critical wear items in any engine—they directly impact compression, oil control, and overall performance longevity. The VERTEX Piston Ring 590310200002 uses advanced...09120315- SKU:
- 09120315
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON DIAMETER METRIC:
- 101.96 MM
- RIDING STYLE:
- UTV
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
$87.10 -
VERTEX Piston Ring 53009804700
VERTEX
$29.35Piston rings are critical wear items that directly impact engine compression, blow-by control, and overall performance longevity. The VERTEX Piston Ring 53009804700 delivers superior durability...09120163- SKU:
- 09120163
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- PISTON RING
- PISTON DIAMETER METRIC:
- 46.95 MM
$29.35 -
VERTEX Piston Ring 53010004450
VERTEX
$25.95Piston ring wear directly impacts compression, blow-by, and engine longevity—making quality replacement rings essential for reliable performance. VERTEX Piston Ring 53010004450 delivers extended...09120164- SKU:
- 09120164
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PISTON DIAMETER METRIC:
- 44.45 MM
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING
$25.95 -
VERTEX Piston Ring 53010004500
VERTEX
$28.30Piston rings are one of the most critical wear components in any engine, directly affecting compression, power output, and oil control. The VERTEX Piston Ring 53010004500 delivers extended service...09120165- SKU:
- 09120165
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 44.97 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- EACH
$28.30 -
VERTEX Piston Ring 53010005200
VERTEX
$30.40Piston rings are critical wear items that directly impact compression, power delivery, and engine longevity. The VERTEX Piston Ring 53010005200 combines advanced surface treatments with precision...09120169- SKU:
- 09120169
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PISTON DIAMETER METRIC:
- 51.95 MM
- UNITS:
- EACH
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
$30.40 -
VERTEX Piston Kit 22501B
VERTEX
$137.95Whether you're rebuilding after hard track miles or upgrading to higher compression, the VERTEX Piston Kit 22501B delivers the precision engineering and material science you need for reliable,...09102075- SKU:
- 09102075
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- DISPLACEMENT:
- 80 CC
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 47.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 47.44 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$137.95 -
VERTEX Piston Kit 22983A
VERTEX
$242.95Engine durability and longevity depend on piston quality, and the VERTEX Piston Kit 22983A delivers the metallurgical precision required for high-stress racing and performance applications. The...09101747- SKU:
- 09101747
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$242.95
