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
-
On Sale
VERTEX Piston Kit 23867B
VERTEX
MSRP: $268.95Now: $172.00Was: $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...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
MSRP: $268.95Now: $172.00Was: $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...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
$4.15Piston 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...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
$4.15 -
VERTEX Piston Circlips - 85/105CC 72050K
VERTEX
$4.15Piston 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...09130048- SKU:
- 09130048
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- UNITS:
- PAIR
- PRODUCT NAME:
- CIRCLIP
$4.15 -
VERTEX Piston Circlips 72055K
VERTEX
$4.15Piston 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...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
$4.15 -
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...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
$4.15Piston 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...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
$4.15 -
VERTEX Piston Circlips 72074K
VERTEX
$4.15Piston 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...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
$4.15 -
VERTEX Piston Ring 53010007200
VERTEX
$48.25Piston 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...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
$48.25 -
VERTEX Piston Ring 55910005400
VERTEX
$41.95Piston 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...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
$41.95 -
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...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...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...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
$213.95Qty in Cart: 0Quantity:Price:$213.95Subtotal: -
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...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...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...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...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 -
On Sale
VERTEX Piston Kit - High Compression 24022B
VERTEX
MSRP: $301.95Now: $193.00Was: $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...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
MSRP: $301.95Now: $193.00Was: $301.95Qty in Cart: 0Quantity:Price:MSRP: $301.95Now: $193.00Was: $301.95Subtotal: -
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...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...09103718- SKU:
- 09103718
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
$354.95
