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 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 -
VERTEX Piston Kit 24188B
VERTEX
$294.95Piston failures don't just cost you a race—they cost you time, money, and credibility. The VERTEX Piston Kit 24188B delivers OEM-grade reliability with forged 2618 aluminum construction and factory-spec engineering, so you can focus on performance...09104663- SKU:
- 09104663
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COMPRESSION RATIO IMPERIAL:
- 14.4:1
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 450 CC
- PISTON DIAMETER METRIC:
- 95.97 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$294.95Qty in Cart: 0Quantity:Price:$294.95Subtotal: -
VERTEX Piston Kit 24189A
VERTEX
$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
$322.95 -
VERTEX Piston Kit 24189B
VERTEX
$322.95The VERTEX Piston Kit 24189B delivers the durability and performance precision your engine demands, whether you're chasing lap times or rebuilding after hard use. Forged from premium 2618 aluminum and heat-treated through a rigorous T-5 cycle, these...09104667- SKU:
- 09104667
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 95.97 MM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- GP RACER'S CHOICE
- DISPLACEMENT:
- 450 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$322.95Qty in Cart: 0Quantity:Price:$322.95Subtotal: -
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 24268B
VERTEX
$289.95The VERTEX Piston Kit 24268B delivers the durability and precision your engine demands, whether you're chasing lap times or rebuilding after serious performance driving. Each piston is engineered with advanced metallurgy and surface treatments to...09105179- SKU:
- 09105179
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- COMPRESSION RATIO IMPERIAL:
- 14.3:1
- PISTON DIAMETER METRIC:
- 76.96 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 4-STROKE
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
$289.95Qty in Cart: 0Quantity:Price:$289.95Subtotal: -
VERTEX Piston Kit 24233C
VERTEX
$188.95Whether you're rebuilding a tired engine or maximizing performance in a fresh build, the VERTEX Piston Kit 24233C delivers the precision engineering and durability required for consistent, reliable power. VERTEX's forged and cast options let you choose...09105185- SKU:
- 09105185
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- PISTON KIT
- CYLINDER DIAMETER METRIC:
- 58.00 MM
- PISTON DIAMETER METRIC:
- 57.96 MM
- STYLE:
- CAST RACE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 144 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$188.95Qty in Cart: 0Quantity:Price:$188.95Subtotal: -
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 24270B
VERTEX
$274.95Whether you're rebuilding after a season of hard racing or upgrading to higher compression, the VERTEX Piston Kit 24270B delivers the durability and performance needed to handle extreme conditions. VERTEX's heat-treated forged and cast options give you...09105192- SKU:
- 09105192
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$274.95Qty in Cart: 0Quantity:Price:$274.95Subtotal: -
VERTEX Piston Kit - Stroker 23879A
VERTEX
$176.95If you're building a stroker engine that demands reliability under extreme combustion pressures, the VERTEX Piston Kit 23879A delivers the precision and durability required for sustained high-performance operation. These pistons are engineered with...09103677- SKU:
- 09103677
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST STROKER
- CYLINDER DIAMETER METRIC:
- 52.00 MM
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 51.95 MM
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 112 CC
- UNITS:
- KIT
$176.95 -
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 VTKTC23003B
VERTEX
$348.95When you're pushing your engine to the limit, your pistons need to withstand extreme heat and pressure without compromising reliability or longevity. The VERTEX Piston Kit VTKTC23003B delivers the durability and performance characteristics that...09103730- SKU:
- 09103730
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
$348.95Qty in Cart: 0Quantity:Price:$348.95Subtotal: -
VERTEX Piston Kit VTKTC23003B-1
VERTEX
$348.95If you're building or rebuilding an engine that demands reliability under extreme conditions, piston quality directly impacts your engine's longevity and power delivery. The VERTEX Piston Kit VTKTC23003B-1 delivers precision engineering with proprietary...09103731- SKU:
- 09103731
- Availability:
- Ships Same Business Day
- Weight:
- 1.57 LBS
$348.95Qty in Cart: 0Quantity:Price:$348.95Subtotal: -
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 -
VERTEX Piston Kit VTKTC23127A
VERTEX
$308.95A quality piston kit is the foundation of reliable, repeatable power in any high-performance engine build. The VERTEX Piston Kit VTKTC23127A delivers precision-engineered pistons built to withstand extreme combustion pressures while maintaining tight...09103739- SKU:
- 09103739
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
$308.95Qty in Cart: 0Quantity:Price:$308.95Subtotal: -
VERTEX Piston Kit VTKTC23127B
VERTEX
$308.95A piston kit is the heart of engine reliability and performance—especially under high-boost or high-RPM conditions where factory components fall short. The VERTEX Piston Kit VTKTC23127B delivers the durability and precision you need for sustained power...09103740- SKU:
- 09103740
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
$308.95Qty in Cart: 0Quantity:Price:$308.95Subtotal: -
VERTEX Piston Kit - High Compression VTKTC23236B
VERTEX
$380.95Building a high-compression engine demands pistons engineered for sustained power delivery and reliability under extreme conditions. The VERTEX Piston Kit VTKTC23236B delivers the precision metallurgy and surface treatments required to handle aggressive...09103746- SKU:
- 09103746
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
$380.95Qty in Cart: 0Quantity:Price:$380.95Subtotal:
