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
-
On Sale
KIBBLEWHITE Valve Guide 60-60730
KIBBLEWHITE
MSRP: $15.92Now: $14.33Was: $15.92Valve guides are critical to engine longevity, and Kibblewhite's 60-60730 delivers the thermal management and wear resistance your high-performance build demands. Manufactured from Ampco-45—an 80%...09262381- SKU:
- 09262381
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4170'
- PRODUCT NAME:
- VALVE GUIDE
- APPLICATION:
- EXHAUST
- MATERIAL:
- AMPCO-45
- MATERIAL:
- NICKEL
- SIZE IMPERIAL:
- STANDARD
- INSIDE DIAMETER IMPERIAL:
- 0.2155'
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $15.92Now: $14.33Was: $15.92 -
On Sale
KIBBLEWHITE Valve Seal - 6mm 71017-4
KIBBLEWHITE
MSRP: $13.96Now: $12.56Was: $13.96Valve seal integrity is critical to engine longevity and oil consumption control—compromised seals lead to blow-by, performance loss, and costly engine damage. KIBBLEWHITE's solid Viton® construction...09262383- SKU:
- 09262383
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- STEM DIAMETER METRIC:
- 6.00 MM
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER IMPERIAL:
- 0.4750'
- PRODUCT NAME:
- SEAL
- TYPE:
- VALVE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- MATERIAL:
- VITON
- UNITS:
- 4 PACK
MSRP: $13.96Now: $12.56Was: $13.96Qty in Cart: 0Quantity:Price:MSRP: $13.96Now: $12.56Was: $13.96Subtotal: -
On Sale
KIBBLEWHITE Exhaust Valve Guide 82-82380
KIBBLEWHITE
MSRP: $18.54Now: $16.69Was: $18.54Valve guide wear is one of the most common causes of oil consumption and compression loss in high-mileage engines. The KIBBLEWHITE Exhaust Valve Guide 82-82380 replaces worn guides with a...09262397- SKU:
- 09262397
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- MATERIAL:
- AMPCO-45
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- ATV
- SIZE IMPERIAL:
- STANDARD
- INSIDE DIAMETER IMPERIAL:
- 0.2155'
- OUTSIDE DIAMETER IMPERIAL:
- 0.4353'
- UNITS:
- EACH
MSRP: $18.54Now: $16.69Was: $18.54 -
On Sale
KIBBLEWHITE Intake Valve 82-82312
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Intake valve performance directly impacts your engine's breathing efficiency and power delivery. The KIBBLEWHITE Black Diamond™ valve eliminates friction losses and resists the thermal cycling and...09262400- SKU:
- 09262400
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TULIP ANGLE:
- 25°
- MATERIAL:
- STAINLESS STEEL
- STEM DIAMETER IMPERIAL:
- 0.2357'
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 35.00 MM
- LENGTH IMPERIAL:
- 4.510'
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- VALVE
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Valve Guide 40-40570
KIBBLEWHITE
MSRP: $17.83Now: $16.05Was: $17.83Valve guide wear directly impacts compression, oil consumption, and combustion efficiency—and Kibblewhite's engineered solution addresses all three. The Ampco-45 compound used in this guide delivers...09262660- SKU:
- 09262660
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- MATERIAL:
- C630 BRONZE
- SIZE IMPERIAL:
- STANDARD
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER IMPERIAL:
- 0.2150'
- OUTSIDE DIAMETER IMPERIAL:
- 0.4365'
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
MSRP: $17.83Now: $16.05Was: $17.83Qty in Cart: 0Quantity:Price:MSRP: $17.83Now: $16.05Was: $17.83Subtotal: -
On Sale
KIBBLEWHITE Intake Valve Kit 60-60470
KIBBLEWHITE
MSRP: $185.23Now: $166.71Was: $185.23If you're running high-RPM applications or pushing your engine beyond stock parameters, valve wear becomes a critical limiting factor in reliability and longevity. The KIBBLEWHITE Intake Valve Kit...09262663- SKU:
- 09262663
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- APPLICATION:
- INTAKE
- SPRING LIFT:
- 0,445'
- TYPE:
- CONVERSION
- SPRING SEAT PRESSURE:
- 51 LB
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- SPRING OPEN PRESSURE:
- 160 LB
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
- SPRING LIFT IMPERIAL:
- 0.445'
MSRP: $185.23Now: $166.71Was: $185.23Qty in Cart: 0Quantity:Price:MSRP: $185.23Now: $166.71Was: $185.23Subtotal: -
On Sale
KIBBLEWHITE Valve Guide 60-60670
KIBBLEWHITE
MSRP: $15.92Now: $14.33Was: $15.92Valve guide wear directly impacts cylinder head sealing, oil consumption, and overall engine reliability—especially in high-RPM or forced-induction applications where precision tolerances are...09262667- SKU:
- 09262667
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- NICKEL
- SIZE IMPERIAL:
- STANDARD
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- INSIDE DIAMETER IMPERIAL:
- 0.2155'
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- MATERIAL:
- BRONZE
- MATERIAL:
- AMPCO-45
- OUTSIDE DIAMETER IMPERIAL:
- 0.4170'
- PRODUCT NAME:
- VALVE GUIDE
MSRP: $15.92Now: $14.33Was: $15.92Qty in Cart: 0Quantity:Price:MSRP: $15.92Now: $14.33Was: $15.92Subtotal: -
On Sale
KIBBLEWHITE Intake Valve - Titanium - Yamaha 80-80912T
KIBBLEWHITE
MSRP: $92.51Now: $83.26Was: $92.51Titanium intake valves are essential for high-RPM reliability and consistent performance in demanding racing applications. The Kibblewhite Tensilite® valve reduces weight while improving heat...09262672- SKU:
- 09262672
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1962'
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 31.00 MM
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 18°
MSRP: $92.51Now: $83.26Was: $92.51 -
On Sale
KIBBLEWHITE Exhaust Valve - Titanium - Yamaha 80-80916T
KIBBLEWHITE
MSRP: $92.51Now: $83.26Was: $92.51Titanium exhaust valves are essential for high-revving engines where stock valves become a reliability bottleneck. KIBBLEWHITE's Tensilite® valves deliver superior durability and thermal stability,...09262673- SKU:
- 09262673
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1760'
- TULIP ANGLE:
- 30°
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- HEAD DIAMETER METRIC:
- 25.00 MM
MSRP: $92.51Now: $83.26Was: $92.51 -
On Sale
KIBBLEWHITE Intake Valve Guide 80-80920
KIBBLEWHITE
MSRP: $15.92Now: $14.33Was: $15.92Valve guide wear is one of the most insidious issues in high-performance engines—it leads to oil consumption, compression loss, and eventual catastrophic failure. The KIBBLEWHITE Intake Valve Guide...09262674- SKU:
- 09262674
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.1962'
- MATERIAL:
- BRONZE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- NICKEL
- OUTSIDE DIAMETER IMPERIAL:
- 0.3957'
- SIZE IMPERIAL:
- STANDARD
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MATERIAL:
- AMPCO-45
- PRODUCT NAME:
- VALVE GUIDE
MSRP: $15.92Now: $14.33Was: $15.92 -
On Sale
KIBBLEWHITE Exhaust Valve Guide 80-80930
KIBBLEWHITE
MSRP: $15.92Now: $14.33Was: $15.92Valve guide wear is one of the most overlooked killers of engine performance and longevity. The KIBBLEWHITE Exhaust Valve Guide 80-80930 uses Ampco-45 bronze—a purpose-built alloy that dissipates...09262676- SKU:
- 09262676
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- OUTSIDE DIAMETER IMPERIAL:
- 0.3563'
- PRODUCT NAME:
- VALVE GUIDE
- MATERIAL:
- AMPCO-45
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER IMPERIAL:
- 0.1760'
- MATERIAL:
- BRONZE
- MATERIAL:
- NICKEL
- SIZE IMPERIAL:
- STANDARD
MSRP: $15.92Now: $14.33Was: $15.92 -
On Sale
KIBBLEWHITE Intake Valve 82-82462
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Stock intake valves are a common failure point in high-revving engines, leading to loss of performance and costly downtime. The Kibblewhite Black Diamond™ Intake Valve delivers superior durability...09262680- SKU:
- 09262680
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- LENGTH IMPERIAL:
- 3.775'
- HEAD DIAMETER METRIC:
- 37.72 MM
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 17°
- APPLICATION:
- INTAKE
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.2160'
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Intake Valve 82-82463
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Your engine's intake valves are critical to breathing efficiency and longevity—they're also among the first components to suffer from heat stress and carbon buildup. The KIBBLEWHITE Black Diamond™...09262681- SKU:
- 09262681
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- HEAD DIAMETER METRIC:
- 38.72 MM
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.2160'
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- LENGTH IMPERIAL:
- 3.775'
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- ATV
- TULIP ANGLE:
- 17°
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve 82-82466
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Exhaust valves endure extreme temperatures and constant mechanical stress—any weakness translates directly to lost power and reliability issues. The KIBBLEWHITE Black Diamond™ exhaust valve delivers...09262682- SKU:
- 09262682
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- APPLICATION:
- EXHAUST
- HEAD DIAMETER METRIC:
- 32.44 MM
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- LENGTH IMPERIAL:
- 3.815'
- TULIP ANGLE:
- 25°
- PRODUCT NAME:
- VALVE
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.2155'
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve Guide 82-82470
KIBBLEWHITE
MSRP: $18.54Now: $16.69Was: $18.54Valve guide wear is one of the most overlooked sources of performance loss and oil consumption in high-revving engines. The KIBBLEWHITE Exhaust Valve Guide 82-82470 is engineered with Ampco-45...09262684- SKU:
- 09262684
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE GUIDE
- INSIDE DIAMETER IMPERIAL:
- 0.2155'
- MATERIAL:
- C630 BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4353'
- UNITS:
- EACH
- RIDING STYLE:
- ATV
- SIZE IMPERIAL:
- STANDARD
MSRP: $18.54Now: $16.69Was: $18.54 -
On Sale
KIBBLEWHITE Intake Valve Guide 82-82480
KIBBLEWHITE
MSRP: $18.54Now: $16.69Was: $18.54Valve guides are the unsung foundation of a reliable, high-revving engine—they keep your valves perfectly aligned while withstanding extreme heat and constant wear. The KIBBLEWHITE Intake Valve Guide...09262686- SKU:
- 09262686
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- INSIDE DIAMETER IMPERIAL:
- 0.2160'
- MATERIAL:
- C630 BRONZE
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- STANDARD
- OUTSIDE DIAMETER IMPERIAL:
- 0.4353'
- UNITS:
- EACH
MSRP: $18.54Now: $16.69Was: $18.54 -
On Sale
KIBBLEWHITE Exhaust Valve - Titanium - KTM 96-96416T
KIBBLEWHITE
MSRP: $109.33Now: $98.40Was: $109.33Titanium exhaust valves are essential for serious engine builders who demand maximum reliability under extreme conditions. Kibblewhite's Tensilite® design reduces reciprocating mass, allowing higher...09262708- SKU:
- 09262708
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- TENSILITE®
- HEAD DIAMETER METRIC:
- 26.55 MM
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
- TULIP ANGLE:
- 30°
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.1955'
MSRP: $109.33Now: $98.40Was: $109.33 -
On Sale
KIBBLEWHITE Intake Valve Guide 96-96420
KIBBLEWHITE
MSRP: $24.89Now: $22.40Was: $24.89Valve guides are critical to maintaining proper valve seat concentricity and preventing excessive oil consumption—premature wear here cascades into catastrophic engine failure. The KIBBLEWHITE Intake...09262709- SKU:
- 09262709
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- SIZE IMPERIAL:
- STANDARD
- APPLICATION:
- INTAKE
- MATERIAL:
- NICKEL
- OUTSIDE DIAMETER IMPERIAL:
- 0.4352'
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- BRONZE
- INSIDE DIAMETER IMPERIAL:
- 0.1960'
- MATERIAL:
- AMPCO-45
- PRODUCT NAME:
- VALVE GUIDE
MSRP: $24.89Now: $22.40Was: $24.89Qty in Cart: 0Quantity:Price:MSRP: $24.89Now: $22.40Was: $24.89Subtotal: -
On Sale
KIBBLEWHITE Intake Valve 40-40921
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01Intake valve performance directly impacts combustion efficiency, airflow consistency, and engine longevity. The Kibblewhite Black Diamond™ 40-40921 is precision-engineered to deliver reliable sealing...09262373- SKU:
- 09262373
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.1960'
- HEAD DIAMETER METRIC:
- 31.00 MM
- LENGTH IMPERIAL:
- 3.610'
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- BLACK DIAMOND™
- UNITS:
- EACH
- TULIP ANGLE:
- 10°
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- UTV
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Exhaust Valve 40-40924
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01Exhaust valves endure extreme heat cycles and combustion pressures—factory units wear quickly under high-performance demands. The Kibblewhite Black Diamond™ valve delivers the durability and...09262374- SKU:
- 09262374
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- LENGTH IMPERIAL:
- 3.655'
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 26.00 MM
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- UTV
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.1955'
- TULIP ANGLE:
- 10°
MSRP: $31.01Now: $27.91Was: $31.01Qty in Cart: 0Quantity:Price:MSRP: $31.01Now: $27.91Was: $31.01Subtotal:
