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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On Sale
Wiseco 68mm Piston Ring Set for Arctic Cat Cheetah Touring 1991-1993 2677CD
WISECO
MSRP: $52.95Now: $42.00Was: $52.95Worn or damaged piston rings compromise compression, increase blow-by, and rob your Arctic Cat Cheetah of power and fuel efficiency. The Wiseco 2677CD ring set restores proper sealing and combustion...2677CD- SKU:
- 2677CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- DISPLACEMENT:
- 195 CC
- RIDING STYLE:
- ATV
- DISPLACEMENT:
- 246,8 CC
- UNITS:
- SET
- BORE SIZE METRIC:
- 68.00 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
MSRP: $52.95Now: $42.00Was: $52.95 -
On Sale
Wiseco Piston Ring Set 79mm Bore for Suzuki DR350 1990-1999 3110XG
WISECO
MSRP: $52.95Now: $42.00Was: $52.95Piston rings are critical to maintaining proper compression and oil control in your engine—worn or damaged rings lead to blow-by, loss of power, and increased fuel consumption. The Wiseco 3110XG ring...3110XG- SKU:
- 3110XG
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- BORE SIZE METRIC:
- 79.00 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
MSRP: $52.95Now: $42.00Was: $52.95 -
On Sale
Wiseco 82.00mm 2-Stroke Piston Ring Set for Arctic Cat Wildcat 700 1991-1993 3228TD
WISECO
MSRP: $57.95Now: $47.00Was: $57.95A worn or damaged piston ring set robs your Arctic Cat Wildcat 700 of compression, throttle response, and overall engine efficiency. The Wiseco 3228TD ring set restores that critical seal between...3228TD- SKU:
- 3228TD
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- BORE SIZE METRIC:
- 82.00 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
MSRP: $57.95Now: $47.00Was: $57.95 -
On Sale
Wiseco Ring Set 83.50mm for Polaris Xplorer 400 4x4 1995-2001 3287TD
WISECO
MSRP: $57.95Now: $47.00Was: $57.95Worn or damaged piston rings are a silent killer of engine performance—they allow blow-by, rob you of compression, and accelerate wear on your cylinder walls. The Wiseco 3287TD ring set restores...3287TD- SKU:
- 3287TD
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- SET
- BORE SIZE METRIC:
- 83.50 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
MSRP: $57.95Now: $47.00Was: $57.95 -
On Sale
Wiseco Piston Kit 89mm 12:1 Compression for 2003-2007 KTM 450 EXC-F 4942M08900
WISECO
MSRP: $284.95Now: $242.00Was: $284.95A high-compression piston kit is essential for maximizing your KTM 450 EXC-F's power output and engine longevity under demanding conditions. The Wiseco 89mm 12:1 compression design delivers improved...09101674- SKU:
- 09101674
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- DISPLACEMENT:
- 448 CC
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 89.00 MM
- SKIRT COATING:
- MOLY COATED
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
MSRP: $284.95Now: $242.00Was: $284.95Qty in Cart: 0Quantity:Price:MSRP: $284.95Now: $242.00Was: $284.95Subtotal: -
On Sale
Wiseco Piston Kit Standard KTM 360 SX 1996-1997 747M07800
WISECO
MSRP: $244.95Now: $208.00Was: $244.95The stock piston in your KTM 360 SX is a limiting factor if you're pushing harder on the track or trail. Wiseco's purpose-built piston kit delivers the precision engineering and thermal management...09101694- SKU:
- 09101694
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 78.00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GP STYLE
- STROKE LENGTH METRIC:
- 74.00 MM
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 353 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
MSRP: $244.95Now: $208.00Was: $244.95Qty in Cart: 0Quantity:Price:MSRP: $244.95Now: $208.00Was: $244.95Subtotal: -
On Sale
Wiseco Piston Kit 58mm for Suzuki RM125 2004-2008 836M05800
WISECO
MSRP: $199.95Now: $170.00Was: $199.95Stock pistons can't handle the demands of serious riding—they wear quickly, lose compression, and rob you of power. The Wiseco 58mm Piston Kit for your RM125 is engineered to reverse that, delivering...09101696- SKU:
- 09101696
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.00 MM
- BORE SIZE METRIC:
- 58.00 MM
- DISPLACEMENT:
- 125 CC
- ENGINE TYPE:
- 2-STROKE
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
MSRP: $199.95Now: $170.00Was: $199.95Qty in Cart: 0Quantity:Price:MSRP: $199.95Now: $170.00Was: $199.95Subtotal: -
On Sale
Wiseco Piston Kit Gas Gas EC 300 2015-2018 850M07200
WISECO
MSRP: $244.95Now: $208.00Was: $244.95A worn or stock piston limits your Gas Gas EC 300's potential, costing you power delivery and engine longevity. The Wiseco piston kit delivers precision-engineered combustion geometry and durable...09101699- SKU:
- 09101699
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- DISPLACEMENT:
- 293 CC
- RIDING STYLE:
- STREET
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
MSRP: $244.95Now: $208.00Was: $244.95Qty in Cart: 0Quantity:Price:MSRP: $244.95Now: $208.00Was: $244.95Subtotal: -
On Sale
Wiseco Piston Kit Standard 47mm 10.5:1 Honda CRF70F 2004-2012 4880M04700
WISECO
MSRP: $134.95Now: $115.00Was: $134.95The Wiseco Piston Kit is engineered for Honda CRF70F owners looking to restore or upgrade their engine's compression and combustion efficiency. A worn or damaged piston directly impacts throttle...09100747- SKU:
- 09100747
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE METRIC:
- 47.00 MM
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 41.40 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- DISPLACEMENT:
- 72 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $134.95Now: $115.00Was: $134.95Qty in Cart: 0Quantity:Price:MSRP: $134.95Now: $115.00Was: $134.95Subtotal: -
On Sale
WISECO Piston Kit with Gaskets PK1399
WISECO
MSRP: $334.95Now: $276.00Was: $334.95The stock piston in your RM-Z450 is a compromise between cost and durability—fine for casual riding, but it limits your engine's potential and can't handle sustained high-RPM abuse. The Wiseco PK1399...09030569- SKU:
- 09030569
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- BORE SIZE METRIC:
- 95.50 MM
- MODEL:
- FORGED SERIES
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- TOP END
- DISPLACEMENT:
- 450 CC
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.80 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- PISTON DIAMETER METRIC:
- 95.44 MM
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
MSRP: $334.95Now: $276.00Was: $334.95 -
On Sale
Wiseco Piston Kit 48mm 10.5:1 Compression for Honda CRF70F 2004-2012 4880M04800
WISECO
MSRP: $127.95Now: $115.00Was: $127.95Stock pistons in your Honda CRF70F can become a limiting factor when you're pushing for consistent power and reliability across seasons. The Wiseco 48mm piston kit delivers the precision-engineered...09100749- SKU:
- 09100749
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- DISPLACEMENT:
- 75 CC
- DISPLACEMENT:
- 72 CC
- STROKE LENGTH METRIC:
- 41.40 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 48.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
MSRP: $127.95Now: $115.00Was: $127.95Qty in Cart: 0Quantity:Price:MSRP: $127.95Now: $115.00Was: $127.95Subtotal: -
On Sale
Wiseco Piston Kit 49.50 mm Bore Honda XR80 1979-1984 4665M04950
WISECO
MSRP: $169.95Now: $144.00Was: $169.95Stock pistons in your Honda XR80 will eventually reach their limits—especially if you're running aggressive ignition timing or pushing RPMs in competitive settings. The Wiseco Piston Kit 49.50 mm...09100327- SKU:
- 09100327
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 49.50 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +2.00 MM
- DISPLACEMENT:
- 87 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.00 MM
- UNITS:
- EACH
MSRP: $169.95Now: $144.00Was: $169.95Qty in Cart: 0Quantity:Price:MSRP: $169.95Now: $144.00Was: $169.95Subtotal: -
On Sale
Wiseco Piston Kit 67.50mm 0.50mm Oversize for Suzuki RM250 1977-1981 405M06750
WISECO
MSRP: $199.95Now: $170.00Was: $199.95A worn or damaged piston compromises combustion efficiency and robs your RM250 of power and responsiveness. The Wiseco 67.50mm oversize piston kit restores your engine to peak performance with...405M06750- SKU:
- 405M06750
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE METRIC:
- 67.50 MM
- DISPLACEMENT:
- 246 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 70.00 MM
- PISTON DIAMETER METRIC:
- 67.44 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $199.95Now: $170.00Was: $199.95 -
On Sale
Wiseco Piston Kit Yamaha YZ250F 2008-2011 4952M07700
WISECO
MSRP: $279.95Now: $238.00Was: $279.95The Wiseco Piston Kit is engineered to deliver measurable gains in acceleration, throttle response, and overall engine reliability for your YZ250F. High-silicon aluminum construction resists thermal...09102936- SKU:
- 09102936
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- STROKE LENGTH METRIC:
- 53.60 MM
- BORE - OVERSIZE:
- +6,00 MM
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +6.00 MM
- BORE SIZE METRIC:
- 83.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
MSRP: $279.95Now: $238.00Was: $279.95 -
On Sale
Wiseco Piston Kit for Honda XR650L 1993-2021 4989M10000
WISECO
MSRP: $248.95Now: $204.00Was: $248.95The Wiseco Piston Kit is engineered for riders who need reliable, consistent performance from their Honda XR650L across all conditions—from high-altitude trails to sustained highway cruising...09102939- SKU:
- 09102939
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- BORE SIZE METRIC:
- 100.00 MM
- STROKE LENGTH METRIC:
- 82.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 650 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
MSRP: $248.95Now: $204.00Was: $248.95 -
On Sale
Wiseco Honda XR650L 1993-2021 Piston Kit 4989M10241
WISECO
MSRP: $269.95Now: $229.00Was: $269.95The Wiseco 4989M10241 piston kit delivers measurable gains in compression ratio and combustion efficiency for your XR650L, translating directly to improved throttle response and mid-range power...09102941- SKU:
- 09102941
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- STROKE LENGTH METRIC:
- 82.00 MM
- PISTON MATERIAL:
- FORGED
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- BORE - OVERSIZE:
- +2,40 MM
- BORE - OVERSIZE METRIC:
- +2.40 MM
- BORE SIZE METRIC:
- 102.40 MM
- DISPLACEMENT:
- 650 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $269.95Now: $229.00Was: $269.95Qty in Cart: 0Quantity:Price:MSRP: $269.95Now: $229.00Was: $269.95Subtotal: -
On Sale
Wiseco Piston Kit 2.00mm Oversize 58.00mm Bore Yamaha YZ125 1976-1982 435M05800
WISECO
MSRP: $179.95Now: $153.00Was: $179.95Yamaha YZ125 owners running 1976–1982 models face inevitable piston wear under competitive riding conditions. The Wiseco 435M05800 kit addresses this head-on with a 2.00mm oversize bore and...435M05800- SKU:
- 435M05800
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- BORE SIZE METRIC:
- 58.00 MM
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 57.95 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 50.00 MM
- BORE - OVERSIZE:
- +2,00 MM
- DISPLACEMENT:
- 123 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $179.95Now: $153.00Was: $179.95 -
On Sale
Wossner Connecting Rod Kawasaki KX500 1989-2004 P2039
WOSSNER
MSRP: $152.00Now: $144.40Was: $152.00If you're rebuilding a KX500 engine, the connecting rod is non-negotiable—it transfers combustion force directly to your crankshaft and must withstand extreme stress cycle after cycle. The Wossner...09230417- SKU:
- 09230417
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- UNITS:
- KIT
- STYLE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $152.00Now: $144.40Was: $152.00 -
On Sale
Wossner 50 SX 2007-2023 Connecting Rod P2053
WOSSNER
MSRP: $112.00Now: $106.40Was: $112.00The Wossner P2053 connecting rod delivers the structural integrity and precision tolerances your 50 SX engine demands for sustained high-RPM performance. Whether you're rebuilding after a failure or...09230419- SKU:
- 09230419
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
MSRP: $112.00Now: $106.40Was: $112.00 -
On Sale
Wossner Connecting Rod for KTM 65 SX 2009-2025 P2055
WOSSNER
MSRP: $112.00Now: $106.40Was: $112.00The connecting rod is one of the most critical components in your engine's rotating assembly—it directly transfers combustion forces to your crankshaft, making its strength and precision...09230421- SKU:
- 09230421
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- STYLE:
- STANDARD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $112.00Now: $106.40Was: $112.00Qty in Cart: 0Quantity:Price:MSRP: $112.00Now: $106.40Was: $112.00Subtotal:
