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 23867B
VERTEX
$268.95The VERTEX Piston Kit 23867B delivers the reliability and precision your engine demands, whether you're rebuilding stock or pushing performance limits. Engineered with premium materials and heat-treated for durability, this kit ensures faster break-in,...09103335- SKU:
- 09103335
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +3,00 MM
- CYLINDER DIAMETER METRIC:
- 81.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +3.00 MM
- DISPLACEMENT:
- 270 CC
- PISTON DIAMETER METRIC:
- 80.97 MM
- STYLE:
- FORGED BIG BORE
$268.95 -
VERTEX Piston Kit VTK24370B
VERTEX
$150.95A quality piston kit is the foundation of reliable high-RPM performance and engine longevity. The VERTEX Piston Kit VTK24370B delivers precision-engineered pistons with advanced surface treatments that reduce friction during break-in and extend service...09103146- SKU:
- 09103146
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- CYLINDER DIAMETER METRIC:
- 47.50 MM
- PRODUCT NAME:
- TOP END PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 47.45 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
$150.95 -
VERTEX Piston Circlips - SX/EXC/XC 72048K
VERTEX
$3.95Piston circlips are critical retention components that keep your piston pin secure under extreme combustion pressures and high-RPM stress. Using OEM-specification VERTEX circlips ensures proper fitment with your piston kit and eliminates the risk of...09130047- SKU:
- 09130047
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- CIRCLIP
- RIDING STYLE:
- UTV
- UNITS:
- PAIR
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
$3.95 -
VERTEX Piston Circlips - 85/105CC 72050K
VERTEX
$3.95Piston circlips are critical retention components that keep your piston pins secure under extreme combustion pressures and high RPM loads. Using OEM-specification circlips ensures proper fitment within Vertex piston kits and eliminates the risk of...09130048- SKU:
- 09130048
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- UNITS:
- PAIR
- PRODUCT NAME:
- CIRCLIP
$3.95 -
VERTEX Piston Circlips 72055K
VERTEX
$3.95Piston circlips are critical retention components that keep your piston rings seated and functioning under extreme combustion pressures. If you're rebuilding a Vertex piston kit, OEM-spec circlips are non-negotiable—inferior replacements can lead to ring...09130049- SKU:
- 09130049
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CIRCLIP
$3.95 -
VERTEX Piston Circlips - SX/EXC250 72060K
VERTEX
$3.95Piston circlips are critical retention components that keep your piston secure within the bore—a failure here means catastrophic engine damage. VERTEX circlips are precision-manufactured to OEM specifications, ensuring reliable fitment and performance in...09130050- SKU:
- 09130050
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- CIRCLIP
- APPLICATION:
- PISTON
- UNITS:
- PAIR
- RIDING STYLE:
- OFF-ROAD
$3.95Qty in Cart: 0Quantity:Price:$3.95Subtotal: -
VERTEX Piston Circlips - 2-Stroke 125/144 72071K
VERTEX
$3.95Piston circlips are a critical wear item in 2-stroke engines—they secure the piston pin and directly impact engine reliability and performance. If you're rebuilding a top-end or replacing a Vertex piston kit, OEM-spec circlips ensure precise fitment and...09130054- SKU:
- 09130054
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- PAIR
- PRODUCT NAME:
- CIRCLIP
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- RIDING STYLE:
- STREET
$3.95 -
VERTEX Piston Circlips 72074K
VERTEX
$3.95Piston circlips are critical retention components that keep your piston pins secure under extreme combustion pressures and RPM loads. Using OEM-specification circlips ensures proper fitment with Vertex piston kits and eliminates the risk of catastrophic...09130056- SKU:
- 09130056
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- CIRCLIP
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
$3.95 -
VERTEX Piston Ring 53010007200
VERTEX
$45.95Piston rings are critical to engine sealing and compression—worn or damaged rings lead to blow-by, power loss, and accelerated engine wear. The VERTEX Piston Ring 53010007200 delivers OEM-quality replacement rings with advanced surface treatments that...09120177- SKU:
- 09120177
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON DIAMETER METRIC:
- 71.95 MM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
$45.95 -
VERTEX Piston Ring 55910005400
VERTEX
$39.95Piston ring wear directly impacts compression, power delivery, and engine longevity. VERTEX Piston Ring 55910005400 delivers the durability needed for sustained high-RPM performance through advanced surface coatings that resist scuffing and premature...09120203- SKU:
- 09120203
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 53.95 MM
- UNITS:
- EACH
$39.95 -
VERTEX Piston Kit 22813CD
VERTEX
$100.95Whether you're rebuilding a worn engine or stepping up to higher compression for more power, the VERTEX Piston Kit 22813CD delivers the durability and precision you need to keep your engine performing at peak output. VERTEX pistons are engineered for...09102064- SKU:
- 09102064
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 50 CC
- PISTON DIAMETER METRIC:
- 39.47 MM
- CYLINDER DIAMETER METRIC:
- 39.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
$100.95 -
VERTEX Piston Kit 23630A
VERTEX
$217.95The VERTEX Piston Kit 23630A delivers the durability and precision your engine demands, whether you're building a competitive race platform or maximizing longevity in a high-output street engine. Factory heat-treatment and advanced skirt coatings reduce...09102066- SKU:
- 09102066
- Availability:
- Ships Same Business Day
- Weight:
- 0.79 LBS
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 66.34 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$217.95Qty in Cart: 0Quantity:Price:$217.95Subtotal: -
VERTEX Piston Kit 23630B
VERTEX
$213.95A piston kit is the heart of your engine's combustion cycle—choosing the right one directly impacts reliability, longevity, and power delivery. The VERTEX Piston Kit 23630B combines advanced metallurgy with proven surface treatments to withstand extreme...09102067- SKU:
- 09102067
- Availability:
- Ships Same Business Day
- Weight:
- 0.79 LBS
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- PISTON DIAMETER METRIC:
- 66.35 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$213.95 -
VERTEX Piston Kit 22978A
VERTEX
$302.95The VERTEX Piston Kit 22978A delivers the precision engineering and durability required for serious engine builds. Whether you're running a high-compression setup or increasing displacement, these pistons are engineered to handle sustained high-RPM loads...09102070- SKU:
- 09102070
- Availability:
- Ships Same Business Day
- Weight:
- 0.84 LBS
$302.95 -
VERTEX Piston Kit - Stroker 23879B
VERTEX
$176.95Whether you're building a high-displacement stroker engine or pushing the limits of your current platform, the VERTEX Piston Kit 23879B delivers the precision engineering and material science your engine demands. These pistons are purpose-built to handle...09103678- SKU:
- 09103678
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST STROKER
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 52.00 MM
- PISTON DIAMETER METRIC:
- 51.96 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 112 CC
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
$176.95 -
VERTEX Piston Kit 24018A
VERTEX
$262.95Premium pistons are the foundation of reliable high-RPM performance, and the VERTEX 24018A kit delivers the durability you need for sustained power without failure. Factory OEM pistons often compromise between cost and longevity—this kit eliminates that...09103679- SKU:
- 09103679
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
$262.95 -
VERTEX Piston Kit - High Compression 24021B
VERTEX
$289.95High-compression pistons are essential for maximizing power output in forced induction and naturally aspirated engines that demand peak performance. The VERTEX 24021B kit delivers precision engineering with proprietary heat-treating and skirt coating...09103688- SKU:
- 09103688
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- PISTON DIAMETER METRIC:
- 76.96 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
- COMPRESSION RATIO IMPERIAL:
- 14.3:1
- ENGINE TYPE:
- 4-STROKE
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- PISTON KIT
$289.95 -
VERTEX Piston Kit - High Compression 24022B
VERTEX
$301.95If you're building an engine that demands reliability under extreme combustion pressures, the VERTEX Piston Kit 24022B delivers the precision tolerances and durability required for sustained high-RPM performance. The T-5 heat treatment and molybdenum...09103691- SKU:
- 09103691
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- PRODUCT NAME:
- PISTON KIT
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- DISPLACEMENT:
- 450 CC
- PISTON DIAMETER METRIC:
- 95.97 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
$301.95 -
VERTEX Piston Kit VTKTC22915B
VERTEX
$354.95Whether you're building a high-revving engine or pushing existing power limits, piston quality directly impacts reliability and longevity under extreme conditions. The VERTEX Piston Kit VTKTC22915B delivers engineered durability through advanced...09103717- SKU:
- 09103717
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
$354.95 -
VERTEX Piston Kit VTKTC22915B-1
VERTEX
$354.95Stock pistons struggle under high-boost or extended track sessions—they warp, wear prematurely, and compromise your engine's reliability. The VERTEX Piston Kit VTKTC22915B-1 solves this with advanced heat treatment and low-friction coatings that extend...09103718- SKU:
- 09103718
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
$354.95
