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!
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- Qty in Cart
- Quantity
- Price
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VINTCO Top End Piston Kit KTY16-1.5
VINTCO
MSRP: $263.85$261.95A worn or damaged top end is a performance killer—it compromises compression, increases blow-by, and accelerates wear on your cylinder. The VINTCO Top End Piston Kit KTY16-1.5 delivers a complete, OEM-quality solution with precision-engineered components...09106455- SKU:
- 09106455
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
MSRP: $263.85$261.95 -
VINTCO Crankshaft Assembly - Honda CR2005
VINTCO
$352.95A crankshaft is the backbone of engine performance—it converts combustion energy into usable power, and any weakness in this critical component directly impacts reliability and output. The VINTCO CR2005 assembly pairs a precision-forged steel crankshaft...09210902- SKU:
- 09210902
- Availability:
- Ships Same Business Day
- Weight:
- 6.11 LBS
$352.95 -
VINTCO Crankshaft Assembly - Honda CR2004
VINTCO
$384.95A crankshaft assembly is the backbone of your engine's power delivery—it converts the linear force of your pistons into rotational energy that drives your vehicle. The VINTCO CR2004 is engineered with a heavy-duty forged steel construction and matched...09210904- SKU:
- 09210904
- Availability:
- Ships Same Business Day
- Weight:
- 7.56 LBS
$384.95 -
VINTCO Crankshaft Assembly - Honda CR2008
VINTCO
$384.95A crankshaft is the foundation of any engine's reliability and longevity. The VINTCO CR2008 assembly pairs a precision-forged steel crankshaft with a heavy-duty connecting rod and integrated wrist pin bearing, delivering the durability and concentricity...09210905- SKU:
- 09210905
- Availability:
- Ships Same Business Day
- Weight:
- 8.81 LBS
$384.95 -
VINTCO Connecting Rod Kit KR2015
VINTCO
$192.95A connecting rod is one of the most critical stress points in any engine—and failure here means catastrophic engine damage. The VINTCO KR2015 is a fully-forged, heavy-duty kit that handles the extreme forces of high-performance driving while maintaining...09230634- SKU:
- 09230634
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
$192.95 -
VINTCO Connecting Rod Kit KR2005
VINTCO
$170.95A connecting rod failure mid-race means catastrophic engine damage and a DNF. The VINTCO KR2005 is built from heavy-duty forged steel to handle sustained high RPMs and boost pressures without flex or fatigue, delivering reliability that matches or...09230636- SKU:
- 09230636
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
$170.95 -
VINTCO Connecting Rod Kit KR2004
VINTCO
$169.95Connecting rod failure is one of the most catastrophic engine failures, often resulting in complete engine seizure or internal damage. The VINTCO KR2004 replaces marginal OEM rods with forged components engineered to handle sustained high RPM operation...09230640- SKU:
- 09230640
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
$169.95 -
VINTCO Connecting Rod Kit KR2027
VINTCO
$181.95Connecting rod failure mid-race or mid-rebuild isn't an option—this is where precision engineering matters. The VINTCO KR2027 delivers forged-steel reliability with optimized bearing lubrication, giving you the durability needed for sustained high-RPM...09230642- SKU:
- 09230642
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
$181.95 -
VINTCO Connecting Rod Kit KR2043
VINTCO
$181.95A connecting rod failure mid-race or mid-drive isn't just inconvenient—it's catastrophic. The VINTCO Connecting Rod Kit KR2043 delivers forged durability that matches or exceeds OEM specs, ensuring your engine can handle sustained high RPM loads without...09230643- SKU:
- 09230643
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
$181.95 -
VINTCO Connecting Rod Kit KR2033
VINTCO
$192.95Connecting rods are the critical link between your pistons and crankshaft—undersized or weak rods are a common failure point under high-RPM and high-boost conditions. The VINTCO KR2033 replaces stock rods with forged components engineered to handle...09230644- SKU:
- 09230644
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
$192.95 -
VINTCO Connecting Rod Kit KR2049
VINTCO
$117.95If you're building or rebuilding an engine for sustained high-RPM operation, connecting rod integrity is non-negotiable—it's the component that translates combustion into usable power while withstanding extreme stress cycles. The VINTCO KR2049 delivers...09230645- SKU:
- 09230645
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
$117.95 -
VINTCO Connecting Rod Kit KR2034
VINTCO
$181.95A connecting rod is one of the most critical load-bearing components in your engine, translating piston motion into crankshaft rotation under extreme stress. The VINTCO KR2034 is built from heavy-duty forged material to withstand high RPM operation and...09230647- SKU:
- 09230647
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
$181.95 -
VINTCO Connecting Rod Kit KR2023
VINTCO
$192.95A connecting rod failure can end your race day or rebuild project before it starts. The VINTCO KR2023 is engineered with heavy-duty forged construction to handle the extreme pressures of high-performance engines while maintaining the precision tolerances...09230648- SKU:
- 09230648
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
$192.95 -
VINTCO Connecting Rod Kit KR2017
VINTCO
$192.95A connecting rod kit is critical to engine reliability under sustained high RPM and boost conditions—factory rods are often the first component to fail in forced induction or high-output builds. The VINTCO KR2017 delivers OEM-equivalent fitment with...09230649- SKU:
- 09230649
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 LBS
$192.95 -
VINTCO Connecting Rod Kit KR2021
VINTCO
$159.95A connecting rod failure can end your racing season before it starts—or worse, damage your entire engine. The VINTCO KR2021 Kit delivers heavy-duty forged construction that matches or exceeds OEM specifications, giving you the reliability needed for...09230650- SKU:
- 09230650
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
$159.95 -
VINTCO Connecting Rod Kit KR2022
VINTCO
$170.95A connecting rod kit is critical to engine reliability—especially under high boost, high RPM, or sustained load conditions where factory components can fail catastrophically. The VINTCO KR2022 delivers forged construction that matches or exceeds OEM...09230651- SKU:
- 09230651
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
$170.95 -
VINTCO Connecting Rod Kit KR2025
VINTCO
$192.95A connecting rod kit is the foundation of engine reliability under extreme loads—whether you're pushing peak RPMs on the track or building a high-displacement street engine. The VINTCO KR2025 delivers heavy-duty forged construction that matches or...09230654- SKU:
- 09230654
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
$192.95 -
VINTCO Connecting Rod Kit KR2008
VINTCO
$170.95A connecting rod kit is fundamental to engine reliability under high RPM and high-load conditions—whether you're building a race engine or upgrading an existing platform. The VINTCO KR2008 delivers the strength and precision needed to handle sustained...09230655- SKU:
- 09230655
- Availability:
- Ships Same Business Day
- Weight:
- 1.04 LBS
$170.95 -
VINTCO Connecting Rod Kit KR2014
VINTCO
$181.95Stock connecting rods are often the weak link in high-revving or forced induction engines, leading to catastrophic failure under load. The VINTCO KR2014 is engineered with heavy-duty forged construction to handle sustained performance demands while...09230656- SKU:
- 09230656
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
$181.95 -
VINTCO Connecting Rod Kit KR2038
VINTCO
$181.95If you're building or rebuilding an engine that demands reliability under extreme loads, the VINTCO Connecting Rod Kit KR2038 delivers the strength and precision required to handle sustained high-RPM operation. This complete kit eliminates the need to...09230658- SKU:
- 09230658
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
$181.95
