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 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...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...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...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...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...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: $165.95Now: $142.00Was: $165.95The 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...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: $165.95Now: $142.00Was: $165.95 -
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...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: $128.95Now: $110.00Was: $128.95If 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...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: $128.95Now: $110.00Was: $128.95 -
On Sale
ATHENA Connecting Rod Kit P40321041
ATHENA
MSRP: $119.95Now: $103.00Was: $119.95Connecting 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...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: $119.95Now: $103.00Was: $119.95 -
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...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: $109.95Qty in Cart: 0Quantity:Price:MSRP: $109.95Now: $99.00Was: $109.95Subtotal: -
On Sale
ATHENA Connecting Rod Kit P40321036
ATHENA
MSRP: $168.95Now: $145.00Was: $168.95A 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...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: $168.95Now: $145.00Was: $168.95 -
On Sale
Wossner Connecting Rod Suzuki RM125 1999-2003 P2013
WOSSNER
MSRP: $122.00Now: $115.90Was: $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...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
MSRP: $122.00Now: $115.90Was: $122.00 -
On Sale
Wossner Connecting Rod KTM 125 SX 2007-2018 P2012
WOSSNER
MSRP: $122.00Now: $115.90Was: $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...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
MSRP: $122.00Now: $115.90Was: $122.00Qty in Cart: 0Quantity:Price:MSRP: $122.00Now: $115.90Was: $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...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
$225.95Qty in Cart: 0Quantity:Price:$225.95Subtotal: -
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...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...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...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...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
$245.95Qty in Cart: 0Quantity:Price:$245.95Subtotal: -
HOT RODS Connecting Rod 8665
HOT RODS
$219.95If you're building a high-rpm engine or refreshing a tired block, connecting rods are the critical link between your crankshaft and pistons—and failure here means catastrophic engine damage. The HOT...09230222- SKU:
- 09230222
- Availability:
- Ships Same Business Day
- Weight:
- 1.73 LBS
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- 8620 STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- OFF-ROAD
$219.95 -
HOT RODS Connecting Rod 8664
HOT RODS
$219.95When you're pushing your engine to the limit, factory connecting rods become your weakest link. The HOT RODS 8664 is engineered for sustained high-RPM performance with certified 8620 AISI steel...09230221- SKU:
- 09230221
- Availability:
- Ships Same Business Day
- Weight:
- 1.86 LBS
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- 8620 STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CONNECTING ROD KIT
$219.95
