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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HOT RODS Crank Bearings K064
HOT RODS
$83.95A crankshaft is only as reliable as its bearing system. The HOT RODS K064 Crank Bearings deliver the precision fit and load capacity you need to support high-RPM operation without premature wear or catastrophic failure. Whether you're running a freshly...09240231- SKU:
- 09240231
- Availability:
- Ships Same Business Day
- Weight:
- 0.77 LBS
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
$83.95 -
HOT RODS Crank Bearings K057
HOT RODS
$107.95A crankshaft is only as reliable as the bearings supporting it. The HOT RODS K057 crank bearing kit delivers the precision tolerances and material integrity required to handle high-RPM loads without premature wear or catastrophic failure. Whether you're...09240213- SKU:
- 09240213
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
- TYPE:
- BALL
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- MAIN CRANKSHAFT
- UNITS:
- KIT
$107.95 -
HOT RODS Crank Bearings K063
HOT RODS
$116.95A crankshaft is only as reliable as its bearings. The HOT RODS K063 crank bearing kit delivers precision-engineered main bearing and seal components that ensure proper load distribution, reduce friction, and maintain critical clearances during high-RPM...09240212- SKU:
- 09240212
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$116.95 -
HOT RODS Crank Bearings K022
HOT RODS
$112.95A crankshaft is only as reliable as the bearings that support it. The HOT RODS K022 crank bearing and seal kit ensures proper load distribution, reduces friction, and maintains critical clearances under extreme RPM and boost conditions...09240036- SKU:
- 09240036
- Availability:
- Ships Same Business Day
- Weight:
- 1.57 LBS
- PRODUCT NAME:
- BEARING
- TYPE:
- BALL
- UNITS:
- SET
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$112.95 -
HOT RODS Crank Bearings K021
HOT RODS
$105.95A crankshaft is only as reliable as its bearings. The HOT RODS K021 crank bearing kit delivers the precision tolerances and material quality required to support high-RPM loads without premature wear or failure. Whether you're rebuilding a stock engine or...09240035- SKU:
- 09240035
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- TYPE:
- BALL
- UNITS:
- SET
- APPLICATION:
- MAIN CRANKSHAFT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
$105.95 -
HOT RODS Crank Bearings K010
HOT RODS
$79.95A crankshaft is only as reliable as its bearings. The HOT RODS K010 main bearing and seal kit ensures precise tolerances and maximum load capacity during high-RPM operation, preventing premature wear and catastrophic engine failure. Whether you're...09240032- SKU:
- 09240032
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
- TYPE:
- BALL
- APPLICATION:
- MAIN CRANKSHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal: -
On Sale
ATHENA Connecting Rod Kit P40321030
ATHENA
MSRP: $164.95Now: $148.00Was: $164.95High-revving engines demand connecting rods engineered to handle extreme stress without compromise. The ATHENA Connecting Rod Kit P40321030 delivers the precision and durability needed to sustain peak performance while maintaining the reliability of...09230499- SKU:
- 09230499
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 450 CC
- UNITS:
- KIT
MSRP: $164.95Now: $148.00Was: $164.95Qty in Cart: 0Quantity:Price:MSRP: $164.95Now: $148.00Was: $164.95Subtotal: -
On Sale
ATHENA Connecting Rod Kit P40321029
ATHENA
MSRP: $157.95Now: $142.00Was: $157.95The ATHENA Connecting Rod Kit P40321029 delivers the reliability and precision your engine demands during high-RPM operation. By combining OEM-equivalent materials with advanced high-frequency treatment, these rods reduce critical stress points that...09230498- SKU:
- 09230498
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $157.95Now: $142.00Was: $157.95 -
On Sale
ATHENA Connecting Rod Kit P40321045
ATHENA
MSRP: $184.95Now: $166.00Was: $184.95A connecting rod is the critical link between your piston and crankshaft—and factory components often become a weak point under high-RPM and forced-induction loads. The ATHENA Connecting Rod Kit P40321045 delivers OEM-equivalent material quality with...09230494- SKU:
- 09230494
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- DISPLACEMENT:
- 250 CC
- DISPLACEMENT:
- 520 CC
- DISPLACEMENT:
- 540 CC
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 450 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 400 CC
- DISPLACEMENT:
- 525 CC
MSRP: $184.95Now: $166.00Was: $184.95 -
On Sale
ATHENA Connecting Rod Kit P40321048
ATHENA
MSRP: $121.95Now: $110.00Was: $121.95If you're building or rebuilding an engine that demands reliability at high RPM, the ATHENA Connecting Rod Kit P40321048 delivers the precision engineering and material quality your build deserves. These Japanese-manufactured rods are designed to...09230489- SKU:
- 09230489
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 125 CC
- DISPLACEMENT:
- 150 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
MSRP: $121.95Now: $110.00Was: $121.95 -
On Sale
ATHENA Connecting Rod Kit P40321041
ATHENA
MSRP: $113.95Now: $103.00Was: $113.95Connecting rods are critical stress components in any engine, and factory originals often become a weak link under high RPM or boost conditions. The ATHENA Connecting Rod Kit P40321041 delivers Japanese precision engineering with OEM-matched materials...09230487- SKU:
- 09230487
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- DISPLACEMENT:
- 85 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $113.95Now: $103.00Was: $113.95 -
On Sale
ATHENA Connecting Rod Kit P40321040
ATHENA
MSRP: $109.95Now: $99.00Was: $109.95If you're building or rebuilding a high-revving engine, connecting rod quality directly impacts reliability and longevity under sustained load. The ATHENA P40321040 kit delivers OEM-equivalent materials with precision engineering and surface treatment...09230486- SKU:
- 09230486
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- DISPLACEMENT:
- 85 CC
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $109.95Now: $99.00Was: $109.95 -
On Sale
ATHENA Connecting Rod Kit P40321036
ATHENA
MSRP: $160.95Now: $145.00Was: $160.95A connecting rod is the critical link between your piston and crankshaft—when it fails, your engine fails. The ATHENA P40321036 Kit delivers the reliability and durability of OEM-quality construction with precision engineering that handles the stresses...09230484- SKU:
- 09230484
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 450 CC
- UNITS:
- KIT
MSRP: $160.95Now: $145.00Was: $160.95 -
Wossner Connecting Rod Suzuki RM125 1999-2003 P2013
WOSSNER
$122.00If you're rebuilding your RM125 top-end, the foundation of reliability starts with a quality connecting rod that can handle the demands of high-RPM racing and trail riding. Wössner's P2013 is engineered with 8620 forged alloy and optimized through...09230404- SKU:
- 09230404
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- STYLE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$122.00 -
Wossner Connecting Rod KTM 125 SX 2007-2018 P2012
WOSSNER
$122.00A connecting rod failure at high RPM doesn't just cost you a race—it can destroy your entire engine. The Wössner P2012 connecting rod is built from 8620 forged alloy and engineered to OEM specifications, giving you the strength and reliability needed for...09230403- SKU:
- 09230403
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- UNITS:
- KIT
- STYLE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
HOT RODS Connecting Rod 8682
HOT RODS
$225.95When you're pushing your engine to the limit, your connecting rods are the critical link between combustion force and crankshaft rotation—they can't fail. The HOT RODS 8682 is engineered for high-RPM reliability with precision manufacturing and proven...09230274- SKU:
- 09230274
- Availability:
- Ships Same Business Day
- Weight:
- 1.76 LBS
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- 8620 STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- INCLUDES THRUST WASHERS
- PRODUCT NAME:
- CONNECTING ROD KIT
$225.95 -
HOT RODS Connecting Rod 8670
HOT RODS
$151.95If you're building or rebuilding a high-performance engine, your connecting rods are the critical link between your crankshaft and pistons—and they need to survive extreme forces at sustained RPMs. The HOT RODS 8670 is engineered for durability and...09230227- SKU:
- 09230227
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- ENGINE TYPE:
- 2-CYCLE
- FEATURES:
- INCLUDES THRUST WASHERS
- UNITS:
- KIT
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
$151.95 -
HOT RODS Connecting Rod 8668
HOT RODS
$159.95If you're building or rebuilding an engine for sustained high-RPM operation, connecting rod durability is non-negotiable—rod failure means catastrophic engine damage. The HOT RODS 8668 is engineered specifically for this challenge, combining premium...09230225- SKU:
- 09230225
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- FEATURES:
- INCLUDES THRUST WASHERS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-CYCLE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
$159.95 -
HOT RODS Connecting Rod 8667
HOT RODS
$251.95When you're pushing your engine to its limits, your connecting rods are working harder than any other component in the rotating assembly. The HOT RODS 8667 is purpose-built to handle sustained high-RPM stress without compromise, delivering the strength...09230224- SKU:
- 09230224
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- 8620 STEEL
$251.95Qty in Cart: 0Quantity:Price:$251.95Subtotal: -
HOT RODS Connecting Rod 8666
HOT RODS
$245.95When you're pushing your engine to the limit, a connecting rod failure can end your season—or worse. The HOT RODS 8666 is engineered for sustained high-RPM performance with heavy-duty 8620 AISI steel construction and advanced bearing designs that...09230223- SKU:
- 09230223
- Availability:
- Ships Same Business Day
- Weight:
- 2.06 LBS
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- 8620 STEEL
- FEATURES:
- INCLUDES THRUST WASHERS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$245.95
