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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Wiseco Steel Intake Valve for Honda CRF70F 2004-2012 and XR70R 1997-2003 VIS022
WISECO
$21.95Your Honda CRF70F or XR70R's intake valve is working harder than OEM specs allow, especially in high-rpm racing or extended performance sessions. A worn or stock valve will compromise combustion...09262242- SKU:
- 09262242
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
$21.95 -
Wiseco Steel Intake Valve for Honda XR250R 1996-2004 VIS024
WISECO
$27.95The stock intake valve in your Honda XR250R faces constant thermal stress and friction that degrades performance over time. Wiseco's VIS024 replaces worn valves with precision-engineered steel that...09262243- SKU:
- 09262243
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
$27.95 -
Wiseco Steel Intake Valve Yamaha YFM350X 2006-2008 VIS028
WISECO
$38.95Stock intake valves wear under sustained high-RPM operation, leading to compression loss and performance degradation. The Wiseco VIS028 replaces that worn valve with precision-engineered construction...09262245- SKU:
- 09262245
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- STAINLESS STEEL
$38.95 -
Wiseco Exhaust Valve Honda CRF250R 2010-2015 VES036
WISECO
$55.95Exhaust valve failures compromise engine efficiency and reliability, especially in high-performance applications where heat and stress are constant threats. The Wiseco VES036 delivers precision...09261743- SKU:
- 09261743
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- STAINLESS STEEL
$55.95 -
Wiseco Steel Intake Valve for KTM 525 XC 2008-2010 VIS035
WISECO
$43.95The Wiseco Steel Intake Valve VIS035 is engineered to deliver extended valve lifespan and reliable performance under the demanding conditions of high-RPM racing and aggressive riding. Its advanced...09261749- SKU:
- 09261749
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
$43.95Qty in Cart: 0Quantity:Price:$43.95Subtotal: -
Wiseco Exhaust Valve for Honda CRF250R 2004-2007 VES001
WISECO
$49.95Factory exhaust valves wear quickly under aggressive riding conditions, leading to compression loss and declining performance. The Wiseco VES001 replaces worn valves with a precision-engineered...09260257- SKU:
- 09260257
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
$49.95 -
Wiseco Exhaust Valve for Honda CRF450R 2002-2006 VES002
WISECO
$49.95If you're running a CRF450R at the edge of its limits—whether on the track or in the dirt—valve wear is a silent performance killer. The Wiseco VES002 exhaust valve eliminates that vulnerability with...09260258- SKU:
- 09260258
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
$49.95 -
Wiseco Exhaust Valve for 1993-2000 Honda XR600R VES004
WISECO
$66.95The Wiseco Exhaust Valve VES004 is engineered to withstand the extreme thermal and mechanical demands of high-performance riding. If you're pushing your XR600R to its limits, a worn or failing...09260260- SKU:
- 09260260
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$66.95 -
Wiseco Ring Set 70.50mm Honda ATC250R 1981-1984 2776CD
WISECO
$52.95Keep your ATC250R running strong with a proper ring set replacement. Worn rings compromise compression, increase oil consumption, and rob you of the power your engine is capable of producing. The...2776CD- SKU:
- 2776CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- UTV
- UNITS:
- SET
- BORE SIZE METRIC:
- 70.50 MM
- DISPLACEMENT:
- 248 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$52.95Qty in Cart: 0Quantity:Price:$52.95Subtotal: -
Wiseco Ring Set 70.50mm Ski-Doo Grand Touring 500 2001 2776CS
WISECO
$25.95A worn or damaged ring set compromises combustion efficiency, increases oil consumption, and robs your Grand Touring 500 of power—the Wiseco 2776CS restores proper compression and sealing for...2776CS- SKU:
- 2776CS
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 70.50 MM
- DISPLACEMENT:
- 514 CC
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- SNOW
- UNITS:
- SET
$25.95 -
Wiseco Ring Set 70mm for Honda CR250R 1978-1980 2756CD
WISECO
$52.95If you're rebuilding a classic Honda CR250R two-stroke, ring seal directly impacts combustion efficiency, power delivery, and engine longevity. Wiseco's 70mm ring set is precision-engineered to...2756CD- SKU:
- 2756CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- SET
- BORE SIZE METRIC:
- 70.00 MM
- PISTON MATERIAL:
- ALUMINUM
- DISPLACEMENT:
- 693 CC
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
$52.95 -
Wiseco 2-Stroke Piston Ring Set 69.50mm Kawasaki KDX220R 1998-2005 2736CD
WISECO
$49.95Worn piston rings kill engine efficiency and power delivery—they're the first component to fail in high-mileage 2-stroke motors. The Wiseco 2736CD ring set restores compression and sealing integrity...2736CD- SKU:
- 2736CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 69.50 MM
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- DISPLACEMENT:
- 463 CC
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
Wiseco Ring Set 69mm 1974-1975 Arctic Cat Cheetah 440 2717CD
WISECO
$52.95Piston ring sets are critical to engine sealing and compression efficiency—worn or incorrect rings lead to blow-by, oil consumption, and power loss. The Wiseco 2717CD is precision-engineered...2717CD- SKU:
- 2717CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 69.00 MM
- RIDING STYLE:
- SNOW
- DISPLACEMENT:
- 436 CC
- RIDING STYLE:
- ATV
$52.95 -
Wiseco 2 Cycle Piston Ring Set 70.75mm Honda CR250R 1978-1980 2786CD
WISECO
$52.95Worn piston rings kill compression, tank power, and waste fuel—especially on high-revving 2-cycle engines like the CR250R. The Wiseco 2786CD ring set restores the sealed combustion chamber your...2786CD- SKU:
- 2786CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 248 CC
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 70.75 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- WATERCRAFT
$52.95 -
Wiseco Ring Set 66.4mm Honda CR250R 1986-2007 2614CD
WISECO
$52.95Piston ring degradation is one of the primary causes of compression loss and increased blow-by in 2-stroke engines—both of which directly impact power delivery and fuel efficiency. The Wiseco 2614CD...2614CD- SKU:
- 2614CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- SET
- BORE SIZE METRIC:
- 66.40 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 249 CC
$52.95 -
Wiseco Ring Set 66.50mm Arctic Cat ZR 440 1996-1998 2618CD
WISECO
$52.95Worn or damaged piston rings are one of the fastest ways to lose compression and watch oil consumption climb—especially in a high-revving 440cc two-stroke like your Arctic Cat ZR. The Wiseco Ring Set...2618CD- SKU:
- 2618CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- DISPLACEMENT:
- 246 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- SET
- BORE SIZE METRIC:
- 66.50 MM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- WATERCRAFT
- DISPLACEMENT:
- 198 CC
- RIDING STYLE:
- ATV
$52.95Qty in Cart: 0Quantity:Price:$52.95Subtotal: -
Wiseco 54mm Piston Ring Set for KTM 125 SX 2001-2020 2126CD
WISECO
$52.95Piston rings are critical to engine sealing and compression—worn or damaged rings will cause blow-by, oil consumption, and power loss. The Wiseco 54mm Piston Ring Set 2126CD delivers the precision...2126CD- SKU:
- 2126CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- DISPLACEMENT:
- 124 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 54.00 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$52.95 -
Wiseco 54mm Piston Ring Set for 1998-2004 Yamaha YZ125 2126CST
WISECO
$25.95Worn or damaged piston rings directly compromise compression, power output, and fuel efficiency—especially critical in high-rev 2-stroke engines like the YZ125. The Wiseco 54mm Ring Set delivers...2126CST- SKU:
- 2126CST
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- SET
- BORE SIZE METRIC:
- 54.00 MM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 124 CC
$25.95Qty in Cart: 0Quantity:Price:$25.95Subtotal: -
Wiseco Ring Set 54.50mm Honda CR125R 1992-2003 Kawasaki KX100 2014-2020 2146CS
WISECO
$25.95Worn or substandard piston rings directly compromise compression, throttle response, and fuel efficiency—making ring replacement one of the highest-impact upgrades for two-stroke performance. The...2146CS- SKU:
- 2146CS
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE METRIC:
- 54.50 MM
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$25.95 -
Wiseco 55.50mm Piston Ring Set for Honda CR125R 1980-1986 Suzuki RM125 1977-1986 2185CD
WISECO
$52.95Worn or damaged piston rings directly compromise compression, increase blow-by, and reduce power output—especially critical in high-revving two-stroke engines like the CR125R and RM125. The Wiseco...2185CD- SKU:
- 2185CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- BORE SIZE METRIC:
- 55.50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 120 CC
- UNITS:
- SET
$52.95
