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 precision your engine demands, with factory-grade heat...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 fatigue resistance, while the molybdenum disulfide skirt...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 durability and thermal stability required for sustained...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 engine needs for consistent power delivery and ring...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: -
VERTEX Piston Ring 50420004800
VERTEX
$27.51Piston 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 longevity. The VERTEX Piston Ring 50420004800 is engineered to...09120842- SKU:
- 09120842
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
$27.51 -
VERTEX Wrist Pin 711195
VERTEX
$57.19Wrist 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 without the distortion risk associated with traditional...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
$57.19 -
VERTEX Piston Ring 590296000003
VERTEX
$85.81Worn 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 consumption, and stabilize ring tension across the full RPM...09120342- SKU:
- 09120342
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$85.81 -
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 to maintain peak performance, whether you're running a...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
$27.51Piston 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 while maintaining the precise tolerances your engine...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
$27.51 -
VERTEX Piston Ring 55910006640
VERTEX
$56.13Piston 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 coatings, reducing friction and extending service life...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
$56.13 -
VERTEX Piston Ring 590288000001
VERTEX
$87.93Piston 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 coating technology with precision engineering to restore or...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
$87.93 -
VERTEX Piston Ring 590210000001
VERTEX
$87.93Piston 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 delivers OEM-quality replacement rings with advanced...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
$87.93 -
VERTEX Piston Ring 590298000001
VERTEX
$85.81Piston 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 coatings that reduce friction and resist scuffing,...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
$85.81 -
VERTEX Piston Ring 590310200002
VERTEX
$87.93Piston 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 nitride coating or chrome plating to resist wear far...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
$87.93 -
VERTEX Piston Ring 53009804700
VERTEX
$29.63Piston 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 through advanced surface coatings, reducing friction and...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
$29.63 -
VERTEX Piston Ring 53010004450
VERTEX
$27.51Piston ring wear directly impacts compression, blow-by, and engine longevity—making quality replacement rings essential for reliable performance. VERTEX Piston Ring 53010004450 delivers extended durability through advanced surface treatments, reducing...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
$27.51 -
VERTEX Piston Ring 53010004500
VERTEX
$28.57Piston 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 life and consistent performance through advanced surface...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
$28.57 -
VERTEX Piston Ring 53010005200
VERTEX
$30.69Piston 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 engineering to deliver superior sealing and extended...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
$30.69 -
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, repeatable power. VERTEX's forged 2618 aluminum construction...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 advanced heat treatment and specialized skirt coating...09101747- SKU:
- 09101747
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$242.95
