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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On Sale
VINTCO Crankshaft Assembly - Honda CR2006
VINTCO
MSRP: $352.95Now: $328.24Was: $352.95A worn or damaged crankshaft compromises engine reliability and performance across the board—power delivery suffers, friction increases, and catastrophic failure becomes a real risk. The VINTCO...09210903- SKU:
- 09210903
- Availability:
- Ships Same Business Day
- Weight:
- 6.16 LBS
MSRP: $352.95Now: $328.24Was: $352.95 -
On Sale
VINTCO Crankshaft Assembly - Honda CR2004
VINTCO
MSRP: $384.95Now: $358.00Was: $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...09210904- SKU:
- 09210904
- Availability:
- Ships Same Business Day
- Weight:
- 7.56 LBS
MSRP: $384.95Now: $358.00Was: $384.95 -
On Sale
VINTCO Crankshaft Assembly - Honda CR2008
VINTCO
MSRP: $384.95Now: $358.00Was: $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...09210905- SKU:
- 09210905
- Availability:
- Ships Same Business Day
- Weight:
- 8.81 LBS
MSRP: $384.95Now: $358.00Was: $384.95 -
On Sale
VINTCO Connecting Rod Kit KR2015
VINTCO
MSRP: $192.95Now: $179.44Was: $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...09230634- SKU:
- 09230634
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
MSRP: $192.95Now: $179.44Was: $192.95 -
On Sale
VINTCO Connecting Rod Kit KR2005
VINTCO
MSRP: $170.95Now: $158.98Was: $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...09230636- SKU:
- 09230636
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
MSRP: $170.95Now: $158.98Was: $170.95 -
On Sale
VINTCO Connecting Rod Kit KR2004
VINTCO
MSRP: $169.95Now: $158.05Was: $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...09230640- SKU:
- 09230640
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
MSRP: $169.95Now: $158.05Was: $169.95 -
On Sale
VINTCO Connecting Rod Kit KR2027
VINTCO
MSRP: $181.95Now: $169.21Was: $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,...09230642- SKU:
- 09230642
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
MSRP: $181.95Now: $169.21Was: $181.95 -
On Sale
VINTCO Connecting Rod Kit KR2043
VINTCO
MSRP: $181.95Now: $169.21Was: $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...09230643- SKU:
- 09230643
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
MSRP: $181.95Now: $169.21Was: $181.95 -
On Sale
VINTCO Connecting Rod Kit KR2049
VINTCO
MSRP: $117.95Now: $109.69Was: $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...09230645- SKU:
- 09230645
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
MSRP: $117.95Now: $109.69Was: $117.95 -
On Sale
VINTCO Connecting Rod Kit KR2034
VINTCO
MSRP: $181.95Now: $169.21Was: $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...09230647- SKU:
- 09230647
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
MSRP: $181.95Now: $169.21Was: $181.95 -
On Sale
VINTCO Connecting Rod Kit KR2023
VINTCO
MSRP: $192.95Now: $179.44Was: $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...09230648- SKU:
- 09230648
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
MSRP: $192.95Now: $179.44Was: $192.95 -
On Sale
VINTCO Connecting Rod Kit KR2017
VINTCO
MSRP: $192.95Now: $179.44Was: $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...09230649- SKU:
- 09230649
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 LBS
MSRP: $192.95Now: $179.44Was: $192.95 -
On Sale
VINTCO Connecting Rod Kit KR2021
VINTCO
MSRP: $159.95Now: $148.75Was: $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...09230650- SKU:
- 09230650
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
MSRP: $159.95Now: $148.75Was: $159.95 -
On Sale
VINTCO Connecting Rod Kit KR2022
VINTCO
MSRP: $170.95Now: $158.98Was: $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...09230651- SKU:
- 09230651
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
MSRP: $170.95Now: $158.98Was: $170.95 -
On Sale
VINTCO Connecting Rod Kit KR2025
VINTCO
MSRP: $192.95Now: $179.44Was: $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...09230654- SKU:
- 09230654
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
MSRP: $192.95Now: $179.44Was: $192.95 -
On Sale
VINTCO Connecting Rod Kit KR2008
VINTCO
MSRP: $170.95Now: $158.98Was: $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...09230655- SKU:
- 09230655
- Availability:
- Ships Same Business Day
- Weight:
- 1.04 LBS
MSRP: $170.95Now: $158.98Was: $170.95 -
On Sale
VINTCO Connecting Rod Kit KR2014
VINTCO
MSRP: $181.95Now: $169.21Was: $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...09230656- SKU:
- 09230656
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
MSRP: $181.95Now: $169.21Was: $181.95 -
On Sale
VINTCO Connecting Rod Kit KR2038
VINTCO
MSRP: $181.95Now: $169.21Was: $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...09230658- SKU:
- 09230658
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
MSRP: $181.95Now: $169.21Was: $181.95 -
On Sale
VINTCO Connecting Rod Kit KR2029
VINTCO
MSRP: $192.95Now: $179.44Was: $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...09230659- SKU:
- 09230659
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
MSRP: $192.95Now: $179.44Was: $192.95 -
On Sale
VINTCO Connecting Rod Kit KR2012
VINTCO
MSRP: $192.95Now: $179.44Was: $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...09230660- SKU:
- 09230660
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
MSRP: $192.95Now: $179.44Was: $192.95
