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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- Price
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VINTCO Connecting Rod Kit KR2018
VINTCO
$192.95A connecting rod kit is fundamental to reliable engine performance—it's the critical link between your crankshaft and piston, handling massive combustion forces with every revolution. The VINTCO KR2018 delivers heavy-duty forged construction that meets...09230653- SKU:
- 09230653
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
$192.95 -
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 KR2051
VINTCO
$95.95A connecting rod failure mid-race can cost you the entire season. The VINTCO KR2051 kit delivers OEM-equivalent durability with heavy-duty forged construction, designed to handle sustained high-RPM stress while maintaining precise tolerances. Upgraded...09230657- SKU:
- 09230657
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
$95.95 -
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 -
VINTCO Connecting Rod Kit KR2029
VINTCO
$192.95A connecting rod kit is the critical bridge between your crankshaft and piston—and factory components often become the limiting factor in high-output builds. The VINTCO KR2029 delivers heavy-duty forged construction that matches or exceeds OEM...09230659- SKU:
- 09230659
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
$192.95 -
VINTCO Connecting Rod Kit KR2012
VINTCO
$192.95A connecting rod failure mid-race or mid-rebuild costs time and money. The VINTCO KR2012 is engineered with heavy-duty forged construction to handle sustained high-RPM loads, while optimized bearing lubrication keeps your engine running cool under stress...09230660- SKU:
- 09230660
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
$192.95 -
VINTCO Connecting Rod Kit KR2019
VINTCO
$181.95A connecting rod kit is only as strong as its weakest component—and that's where the VINTCO KR2019 separates itself from budget alternatives. Heavy-duty forged construction ensures your engine can handle sustained high RPM loads without sacrifice, while...09230661- SKU:
- 09230661
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
$181.95 -
VINTCO Connecting Rod Kit KR2055
VINTCO
$95.95High-performance engine builds demand connecting rods that can handle sustained power delivery without failure. The VINTCO KR2055 combines forged durability with precision engineering to provide the reliability you need when pushing your engine to its...09230663- SKU:
- 09230663
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
$95.95 -
VINTCO Connecting Rod Kit KR2026
VINTCO
$192.95Connecting rod failure is catastrophic—it destroys engines and ends racing seasons. The VINTCO KR2026 is built from forged construction that handles peak combustion pressures and sustained high-RPM loads, giving you the durability demanded by serious...09230666- SKU:
- 09230666
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
$192.95 -
VINTCO Connecting Rod Kit KR2041
VINTCO
$277.95A connecting rod kit is critical for engine durability under high-RPM and boost conditions—cheap or worn rods are a primary failure point in performance builds. The VINTCO KR2041 delivers forged construction with precision bearing surfaces and...09230667- SKU:
- 09230667
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
$277.95 -
VINTCO Connecting Rod Kit KR2040
VINTCO
$277.95A connecting rod failure mid-race or mid-build will cost you far more than the right component upfront. The VINTCO KR2040 delivers forged construction that handles peak combustion pressures without compromise, while precision-engineered bearing surfaces...09230668- SKU:
- 09230668
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
$277.95 -
VINTCO Connecting Rod Kit KR2006
VINTCO
$170.95A connecting rod failure can derail your entire engine build, which is why the VINTCO KR2006 is engineered with heavy-duty forged construction to handle the extreme loads of high-performance racing and rebuilds. This complete kit eliminates the guesswork...09230669- SKU:
- 09230669
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
$170.95 -
VINTCO Connecting Rod Kit KR2013
VINTCO
$181.95If you're building or rebuilding an engine for sustained high-performance use, connecting rod failure isn't an option—it's a catastrophic loss of investment and track time. The VINTCO KR2013 kit delivers the durability and precision engineering required...09230670- SKU:
- 09230670
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
$181.95 -
VINTCO Connecting Rod Kit KR2028
VINTCO
$192.95High-revving engines demand connecting rods that can handle sustained peak loads without failure. The VINTCO KR2028 is a forged-construction rod kit built for serious power applications, delivering the reliability and precision needed to keep your engine...09230672- SKU:
- 09230672
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
$192.95 -
VINTCO Main Bearing and Seal Kit - Honda KMB001
VINTCO
$49.95A complete crankshaft installation demands precision-engineered bearings and seals that can handle sustained high-RPM loads without compromise. The VINTCO Main Bearing and Seal Kit delivers OEM-quality Japanese manufacturing, ensuring your engine's...09240649- SKU:
- 09240649
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
$49.95 -
VINTCO Main Bearing and Seal Kit - Honda KMB002
VINTCO
$29.95A worn or failing crankshaft bearing kit will cause increased friction, metal-to-metal contact, and catastrophic engine damage if left unaddressed. The VINTCO KMB002 delivers OEM-grade bearings and seals engineered to maintain precise clearances and...09240650- SKU:
- 09240650
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
$29.95 -
VINTCO Main Bearing and Seal Kit - Honda KMB030
VINTCO
$54.95A worn or damaged crankshaft bearing can compromise engine durability and performance, leading to catastrophic failure if left unaddressed. This VINTCO Main Bearing and Seal Kit delivers OEM-equivalent components engineered to restore proper crankshaft...09240652- SKU:
- 09240652
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
$54.95 -
VINTCO Main Bearing and Seal Kit - Honda KMB004
VINTCO
$49.95A crankshaft rebuild demands precision bearings and seals that won't compromise reliability under sustained load and RPM. The VINTCO KMB004 kit eliminates the guesswork of sourcing individual components by pairing OEM-spec bearings with matched seals...09240653- SKU:
- 09240653
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
$49.95
