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 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 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
$82.95 -
VERTEX Piston Ring 590298000001
VERTEX
$80.95Piston 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
$80.95 -
VERTEX Piston Ring 590310200002
VERTEX
$82.95Piston 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
$82.95 -
VERTEX Piston Ring 53009804700
VERTEX
$27.95Piston 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
$27.95 -
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 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
$25.95 -
VERTEX Piston Ring 53010004500
VERTEX
$26.95Piston 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
$26.95 -
VERTEX Piston Ring 53010005200
VERTEX
$28.95Piston 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
$28.95 -
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 -
VERTEX Piston Kit 23430CD
VERTEX
$104.95Precision-engineered pistons are the foundation of reliable high-RPM performance, and the VERTEX Piston Kit 23430CD delivers the durability and heat resistance required for sustained racing demands. The advanced T-5 heat treatment process ensures...09101835- SKU:
- 09101835
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 45.00 MM
- DISPLACEMENT:
- 65 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STYLE:
- CAST REPLICA
- PISTON DIAMETER METRIC:
- 44.97 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$104.95 -
VERTEX Piston Kit 22459B
VERTEX
$218.95A quality piston kit is fundamental to engine longevity and reliable performance under load. The VERTEX Piston Kit 22459B delivers precision engineering with heat-treated construction and a specialized skirt coating designed to reduce friction during...09100995- SKU:
- 09100995
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- CYLINDER DIAMETER METRIC:
- 67.50 MM
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- PISTON DIAMETER METRIC:
- 67.45 MM
$218.95 -
VERTEX Piston Kit - Standard 22649B
VERTEX
$207.95High-quality pistons are critical to maintaining ring seal integrity and consistent compression across the power stroke—especially in high-rpm or forced-induction applications. The VERTEX Piston Kit 22649B delivers precision engineering with advanced...09100996- SKU:
- 09100996
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- STYLE:
- CAST REPLICA
- PISTON DIAMETER METRIC:
- 66.35 MM
$207.95 -
VERTEX Piston Kit - Standard 22909B
VERTEX
$223.95If you're building or rebuilding an engine that demands reliability under sustained high RPM and boost conditions, quality pistons are non-negotiable. The VERTEX Piston Kit 22909B delivers the durability and performance characteristics you need to avoid...09100998- SKU:
- 09100998
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- 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
- CYLINDER DIAMETER METRIC:
- 66.40 MM
$223.95 -
On Sale
VERTEX Piston Kit 24189A
VERTEX
MSRP: $322.95Now: $207.00Was: $322.95Engine reliability hinges on piston quality—weak or worn pistons compromise compression, efficiency, and longevity across your entire power band. The VERTEX Piston Kit 24189A delivers OEM-level durability with forged 2618 aluminum construction and proven...09104666- SKU:
- 09104666
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- DISPLACEMENT:
- 450 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- GP RACER'S CHOICE
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- PISTON DIAMETER METRIC:
- 95.96 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
MSRP: $322.95Now: $207.00Was: $322.95 -
VERTEX Piston Kit 24267B
VERTEX
$256.95Whether you're rebuilding a tired top end or preparing for competition, piston quality directly impacts engine longevity, reliability, and peak performance. The VERTEX Piston Kit 24267B delivers OEM-grade construction with heat-treated,...09105175- SKU:
- 09105175
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
$256.95 -
VERTEX Piston Kit 24142A
VERTEX
$327.95The VERTEX Piston Kit 24142A delivers the durability and precision needed for sustained high-RPM performance, whether you're rebuilding a stock engine or pushing for peak power gains. With premium forged and cast options engineered for different...09105186- SKU:
- 09105186
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- COMPRESSION RATIO IMPERIAL:
- 14.4:1
- PISTON DIAMETER METRIC:
- 80.96 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +3.00 MM
- ENGINE TYPE:
- 4-STROKE
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- BORE - OVERSIZE:
- +3,00 MM
- CYLINDER DIAMETER METRIC:
- 81.00 MM
- DISPLACEMENT:
- 270 CC
- STYLE:
- FORGED BIG BORE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$327.95 -
VERTEX Piston Kit VTKTC22983B
VERTEX
$310.95OEM pistons often fail under sustained high-RPM load, leaving you stranded or facing catastrophic engine damage. The VERTEX Piston Kit VTKTC22983B delivers competition-grade durability through advanced heat treatment and premium surface coatings,...09103725- SKU:
- 09103725
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
$310.95 -
VERTEX Piston Kit - High Compression VTKTC23113B
VERTEX
$341.95High-compression pistons are essential for maximizing power output in forced induction and high-revving naturally aspirated builds, and the VERTEX Piston Kit delivers the durability and precision required for sustained performance. The T-5 heat-treatment...09103737- SKU:
- 09103737
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
$341.95 -
On Sale
VERTEX Piston Kit 23736B
VERTEX
MSRP: $290.95Now: $186.00Was: $290.95A quality piston kit is the foundation of any reliable high-performance engine build. The VERTEX Piston Kit 23736B delivers the durability and precision needed to withstand extreme combustion pressures while maintaining consistent ring seal and minimal...09102615- SKU:
- 09102615
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- DISPLACEMENT:
- 250 CC
- PISTON DIAMETER METRIC:
- 76.96 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
MSRP: $290.95Now: $186.00Was: $290.95 -
On Sale
Wiseco 48.50mm Piston Ring Set for Kawasaki KX85 2014-2024 1909CS
WISECO
MSRP: $25.95Now: $21.00Was: $25.95Proper ring sealing is critical for maximizing compression, controlling blowby, and maintaining peak power delivery in your KX85. The Wiseco 1909CS ring set delivers precision engineering that ensures consistent performance across the entire RPM range,...1909CS- SKU:
- 1909CS
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- DISPLACEMENT:
- 84,7 CC
- BORE SIZE METRIC:
- 48.50 MM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
MSRP: $25.95Now: $21.00Was: $25.95
