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 - High Compression VTKTC23855B
VERTEX
$354.95If you're building a high-compression engine that demands reliability under sustained load, the VERTEX Piston Kit VTKTC23855B delivers the durability and precision required for serious racing...09103803- SKU:
- 09103803
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
$354.95 -
On Sale
VERTEX Piston Kit 23679B
VERTEX
MSRP: $236.95Now: $152.00Was: $236.95A piston kit is only as reliable as its material composition and heat treatment—factors that directly impact engine longevity under sustained high RPM and boost conditions. The VERTEX Piston Kit...09102585- SKU:
- 09102585
- Availability:
- Ships Same Business Day
- Weight:
- 0.59 LBS
- BORE - OVERSIZE:
- +3,00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.4:1
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 79.97 MM
- CYLINDER DIAMETER METRIC:
- 80.00 MM
- DISPLACEMENT:
- 270 CC
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +3.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- FORGED BIG BORE
- PRODUCT NAME:
- PISTON KIT
MSRP: $236.95Now: $152.00Was: $236.95Qty in Cart: 0Quantity:Price:MSRP: $236.95Now: $152.00Was: $236.95Subtotal: -
VERTEX Piston Kit 23711A
VERTEX
$302.95Whether you're rebuilding a tired engine or pushing higher compression ratios for competition, the VERTEX Piston Kit 23711A delivers the durability and precision needed for reliable power across the...09102593- SKU:
- 09102593
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
$302.95 -
VERTEX Piston Kit 23653B
VERTEX
$315.95Whether you're rebuilding a two-stroke or four-stroke engine, piston selection directly impacts durability, power delivery, and longevity under sustained load. The VERTEX Piston Kit 23653B delivers...09102040- SKU:
- 09102040
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE - OVERSIZE METRIC:
- +3.20 MM
- CYLINDER DIAMETER METRIC:
- 80 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 79.97 MM
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +3,20 MM
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- FORGED BIG BORE
- DISPLACEMENT:
- 270 CC
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
$315.95Qty in Cart: 0Quantity:Price:$315.95Subtotal: -
VERTEX Piston Kit 23637B
VERTEX
$171.95The VERTEX Piston Kit 23637B delivers reliable, high-performance pistons engineered for extended engine life and consistent power delivery. Whether you're rebuilding a worn top end or upgrading to...09102048- SKU:
- 09102048
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- PISTON DIAMETER METRIC:
- 48.45 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 48.50 MM
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
$171.95 -
VERTEX Piston Kit VTK22863B-1
VERTEX
$150.95A piston kit is the heart of your engine's combustion cycle—and VERTEX engineered the VTK22863B-1 to deliver the reliability and precision that separates consistent power from catastrophic failure...09103027- SKU:
- 09103027
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 85 CC
- STYLE:
- CAST REPLICA
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 47.45 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 47.50 MM
- PRODUCT NAME:
- TOP END PISTON KIT
$150.95 -
VERTEX Piston Kit VTKTC23003A
VERTEX
$341.95Piston failure cuts racing short and empties wallets fast. The VERTEX Piston Kit VTKTC23003A delivers the durability and precision needed for sustained high-RPM performance, with advanced metallurgy...09103727- SKU:
- 09103727
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
$341.95Qty in Cart: 0Quantity:Price:$341.95Subtotal: -
VERTEX Piston Kit - Standard 23375B
VERTEX
$254.95Engine durability and longevity depend on pistons that can withstand extreme combustion pressures and thermal cycling without compromise. The VERTEX Piston Kit 23375B delivers the precision...09101002- SKU:
- 09101002
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- CYLINDER DIAMETER METRIC:
- 72.00 MM
- PRODUCT NAME:
- PISTON KIT
- ENGINE TYPE:
- 2-STROKE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 300 CC
- PISTON DIAMETER METRIC:
- 71.95 MM
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
$254.95 -
VERTEX Piston Ring 53010003950
VERTEX
$25.95Piston rings are wear items that demand replacement to maintain compression, oil control, and engine efficiency. The VERTEX Piston Ring 53010003950 delivers the durability and precision fit your...09120346- SKU:
- 09120346
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 90.45 MM
- PRODUCT NAME:
- PISTON RING
- BORE SIZE METRIC:
- 90.50 MM
- UNITS:
- SET
$25.95 -
VERTEX Piston Kit - Standard 23429CD
VERTEX
$99.95Precision-engineered pistons are the foundation of reliable high-RPM performance, and the VERTEX Standard 23429CD delivers the durability required for sustained boost and aggressive tuning. Built...09102065- SKU:
- 09102065
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 50 CC
- PISTON DIAMETER METRIC:
- 39.47 MM
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- CYLINDER DIAMETER METRIC:
- 39.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$99.95 -
VERTEX Piston Kit 24101B
VERTEX
$223.95The VERTEX Piston Kit 24101B delivers the reliability and performance precision you need for consistent power delivery across the entire RPM range. Whether you're rebuilding a tired top end or...09104071- SKU:
- 09104071
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- DISPLACEMENT:
- 150 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- PISTON DIAMETER METRIC:
- 57.97 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- CYLINDER DIAMETER METRIC:
- 58 MM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- CAST REPLICA
$223.95 -
VERTEX Piston Kit - Standard 22646B
VERTEX
$235.95The VERTEX Piston Kit 22646B delivers the durability and precision your engine demands, whether you're chasing lap times or building a reliable long-term platform. Purpose-engineered with advanced...09100951- SKU:
- 09100951
- Availability:
- Ships Same Business Day
- Weight:
- 0.73 LBS
- PISTON DIAMETER METRIC:
- 66.35 MM
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- STYLE:
- CAST REPLICA
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- DISPLACEMENT:
- 250 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$235.95Qty in Cart: 0Quantity:Price:$235.95Subtotal: -
VERTEX Piston Kit - Standard 22387B
VERTEX
$208.95A quality piston kit is the foundation of reliable engine performance, and the VERTEX Piston Kit 22387B delivers the durability and precision you need for consistent power delivery and extended...09101032- SKU:
- 09101032
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- CYLINDER DIAMETER METRIC:
- 66.40 MM
- DISPLACEMENT:
- 250 CC
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- PISTON DIAMETER METRIC:
- 66.35 MM
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
$208.95 -
VERTEX Piston Kit 23335B
VERTEX
$189.95A piston kit is only as good as its material composition and heat treatment process—this VERTEX 23335B delivers both. These pistons are engineered to handle sustained high-RPM loads and thermal...09102117- SKU:
- 09102117
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED RACE
- BORE - OVERSIZE:
- +4,00 MM
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 58.00 MM
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE - OVERSIZE METRIC:
- +4.00 MM
- DISPLACEMENT:
- 144 CC
- PISTON DIAMETER METRIC:
- 57.96 MM
- PRODUCT NAME:
- PISTON KIT
$189.95 -
Wiseco Ring Set 47mm Yamaha PW80 1991-2006 1850CD
WISECO
$52.95Piston rings are the critical seal between your combustion chamber and crankcase—worn or inadequate rings kill compression, increase blow-by, and tank engine efficiency. The Wiseco 1850CD ring set is...1850CD- SKU:
- 1850CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 82,9 CC
- UNITS:
- SET
- BORE SIZE METRIC:
- 47.00 MM
- PRODUCT NAME:
- PISTON RING
$52.95 -
Wiseco Piston Ring Set 47mm Honda CR80R 1986-2002 1850CS
WISECO
$25.95Worn or damaged piston rings kill engine sealing, causing compression loss, blow-by, and poor performance—especially critical in a high-revving 2-stroke like the CR80R. The Wiseco 1850CS ring set...1850CS- SKU:
- 1850CS
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- DISPLACEMENT:
- 82,9 CC
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- BORE SIZE METRIC:
- 47.00 MM
- UNITS:
- SET
$25.95 -
Wiseco 47.50mm Piston Ring Set for Yamaha BW80 1986-1990 1869CD
WISECO
$52.95Piston rings are critical to engine sealing and compression integrity—worn or improper rings lead to blow-by, oil consumption, and power loss. The Wiseco 1869CD ring set delivers precision...1869CD- SKU:
- 1869CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- BORE SIZE METRIC:
- 47.50 MM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM
- DISPLACEMENT:
- 82,9 CC
- UNITS:
- SET
$52.95Qty in Cart: 0Quantity:Price:$52.95Subtotal: -
Wiseco Piston Ring Set 47.5mm for Honda CR80R 1986-2002 1869CS
WISECO
$25.95Keep your CR80R's combustion chamber sealed tight and your oil where it belongs—in the crankcase, not the exhaust. A worn piston ring set kills compression, tanks fuel economy, and accelerates engine...1869CS- SKU:
- 1869CS
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- DISPLACEMENT:
- 82,9 CC
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- BORE SIZE METRIC:
- 47.50 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$25.95 -
Wiseco 48mm Piston Ring Set for Honda CR80R 1986-2002 1890CS
WISECO
$25.95A properly sealed combustion chamber is critical for maximizing horsepower and engine longevity on your CR80R. Wiseco's precision-engineered piston ring set delivers the compression consistency and...1890CS- SKU:
- 1890CS
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 48.00 MM
- DISPLACEMENT:
- 82,9 CC
- UNITS:
- SET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$25.95 -
Wiseco 48.5mm Piston Ring Set for Kawasaki KX85 2001-2013 1909CD
WISECO
$52.95Worn or damaged piston rings directly compromise combustion sealing, reducing power output and increasing blow-by—both performance killers on the track or trail. The Wiseco 1909CD delivers...1909CD- SKU:
- 1909CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BORE SIZE METRIC:
- 48.50 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 82,9 CC
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$52.95
