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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On Sale
KIBBLEWHITE Intake Valve 80-81313
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55If you're serious about engine reliability and longevity, valve quality directly impacts combustion efficiency, heat dissipation, and resistance to thermal cycling stress. The KIBBLEWHITE Black Diamond™ Intake Valve delivers the precision engineering and...09263029- SKU:
- 09263029
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- LENGTH IMPERIAL:
- 3.495'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 32.00 MM
- APPLICATION:
- INTAKE
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- ATV
- TULIP ANGLE:
- 15°
- STEM DIAMETER IMPERIAL:
- 0.1765'
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Valve Guide 80-81320
KIBBLEWHITE
MSRP: $17.83Now: $16.05Was: $17.83Valve guides are the backbone of cylinder head durability—they keep your valves aligned under extreme heat and pressure cycles. Kibblewhite's Ampco-45 construction delivers superior thermal conductivity and wear resistance, ensuring your valvetrain...09263032- SKU:
- 09263032
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE GUIDE
- MATERIAL:
- C630 BRONZE
- APPLICATION:
- INTAKE
- INSIDE DIAMETER IMPERIAL:
- 0.1760'
- OUTSIDE DIAMETER IMPERIAL:
- 0.3564'
- RIDING STYLE:
- ATV
- SIZE IMPERIAL:
- STANDARD
MSRP: $17.83Now: $16.05Was: $17.83 -
On Sale
KIBBLEWHITE Intake Valve 82-82612
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Intake valves are critical to your engine's breathing efficiency and longevity—cheap or worn valves will rob you of power and reliability. The KIBBLEWHITE Black Diamond™ Intake Valve delivers precision engineering with superior corrosion resistance,...09263033- SKU:
- 09263033
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- LENGTH IMPERIAL:
- 3.775'
- HEAD DIAMETER METRIC:
- 37.72 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 17°
- APPLICATION:
- INTAKE
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.2160'
- UNITS:
- EACH
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Intake Valve 82-82613
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Your engine's intake valve is under constant thermal and mechanical stress—poorly engineered valves lead to carbon buildup, premature wear, and power loss. KIBBLEWHITE's Black Diamond™ valves are engineered to withstand extreme conditions while...09263034- SKU:
- 09263034
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- HEAD DIAMETER METRIC:
- 38.72 MM
- APPLICATION:
- INTAKE
- LENGTH IMPERIAL:
- 3.775'
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.2160'
- UNITS:
- EACH
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 17°
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Intake Valve 82-82616
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Intake valve performance directly impacts combustion efficiency, throttle response, and engine longevity. The KIBBLEWHITE Black Diamond™ Intake Valve delivers precision engineering and material science that minimizes friction losses while maximizing...09263035- SKU:
- 09263035
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MODEL:
- BLACK DIAMOND™
- TULIP ANGLE:
- 25°
- LENGTH IMPERIAL:
- 3.805'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- HEAD DIAMETER METRIC:
- 29.21 MM
- STEM DIAMETER IMPERIAL:
- 0.2155'
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Intake Valve 82-82617
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Intake valve performance directly impacts combustion efficiency, fuel atomization, and overall engine responsiveness—making quality valve selection critical for both track and street applications. The KIBBLEWHITE Black Diamond™ valve leverages precision...09263036- SKU:
- 09263036
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- ATV
- TULIP ANGLE:
- 25°
- APPLICATION:
- INTAKE
- MODEL:
- BLACK DIAMOND™
- STEM DIAMETER IMPERIAL:
- 0.2155'
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 30.21 MM
- LENGTH IMPERIAL:
- 3.805'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve Guide 82-82630
KIBBLEWHITE
MSRP: $18.54Now: $16.69Was: $18.54Valve guide wear is one of the quickest ways to compromise combustion efficiency and increase oil consumption in high-performance engines. The KIBBLEWHITE Exhaust Valve Guide 82-82630 uses Ampco-45 bronze to deliver superior heat transfer and wear...09263038- SKU:
- 09263038
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- C630 BRONZE
- PRODUCT NAME:
- VALVE GUIDE
- INSIDE DIAMETER IMPERIAL:
- 0.2155'
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- SIZE IMPERIAL:
- STANDARD
- OUTSIDE DIAMETER IMPERIAL:
- 0.4353'
MSRP: $18.54Now: $16.69Was: $18.54 -
On Sale
KIBBLEWHITE Intake Valve 60-60512H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55A quality intake valve is fundamental to your engine's breathing efficiency and thermal management under extreme conditions. KIBBLEWHITE's White Diamond™ valves deliver the precision engineering and durability demanded by competitive racers and serious...09263139- SKU:
- 09263139
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- WHITE DIAMOND™
- TULIP ANGLE:
- 15°
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 31.00 MM
- LENGTH IMPERIAL:
- 3.175'
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
- SIZE METRIC:
- STANDARD
- STEM DIAMETER IMPERIAL:
- 0.1765'
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve 60-60516H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55High-RPM engines demand valves that can withstand extreme temperatures and sustained combustion pressures without degradation. KIBBLEWHITE's White Diamond™ exhaust valves deliver the thermal stability and durability required for serious racing and...09263140- SKU:
- 09263140
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- WHITE DIAMOND™
- APPLICATION:
- EXHAUST
- LENGTH IMPERIAL:
- 3.185'
- HEAD DIAMETER METRIC:
- 25.00 MM
- UNITS:
- EACH
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- SIZE METRIC:
- STANDARD
- STEM DIAMETER IMPERIAL:
- 0.1760'
- TULIP ANGLE:
- 25°
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Intake Valve 60-60050H
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01If you're serious about engine reliability and consistent performance, your intake valves need to handle extreme temperatures and combustion pressures without compromise. The KIBBLEWHITE White Diamond™ intake valve combines aerospace-grade materials with...09263141- SKU:
- 09263141
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- LENGTH IMPERIAL:
- 3.245'
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
- SIZE METRIC:
- STANDARD
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 36.00 MM
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.1960'
- UNITS:
- EACH
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Intake Valve 60-60051H
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01If you're running a high-revving engine that demands precision, valve quality directly impacts combustion efficiency, heat dissipation, and longevity under extreme conditions. KIBBLEWHITE's White Diamond™ valves eliminate the guesswork with one-piece...09263142- SKU:
- 09263142
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH IMPERIAL:
- 3.245'
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- SIZE METRIC:
- OVERSIZE
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 37.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.1960'
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Exhaust Valve 60-60053H
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01Exhaust valves are the gatekeepers of your engine's breathing cycle—and inferior valves will cost you horsepower, reliability, and race-day consistency. KIBBLEWHITE's White Diamond™ valves are engineered to withstand extreme heat cycling and aggressive...09263143- SKU:
- 09263143
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- APPLICATION:
- EXHAUST
- HEAD DIAMETER METRIC:
- 29.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- LENGTH IMPERIAL:
- 3.210'
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
- SIZE METRIC:
- STANDARD
- TULIP ANGLE:
- 17°
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.1953'
- UNITS:
- EACH
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Exhaust Valve 60-60054H
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01Exhaust valves endure extreme heat cycles and combustion pressures that demand uncompromising material science—this is where precision engineering separates reliable engines from ones headed for failure. The Kibblewhite White Diamond™ exhaust valve...09263144- SKU:
- 09263144
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- SIZE METRIC:
- OVERSIZE
- APPLICATION:
- EXHAUST
- HEAD DIAMETER METRIC:
- 30.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 17°
- UNITS:
- EACH
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.1953'
- LENGTH IMPERIAL:
- 3.210'
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Intake Valve 60-60271H
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01Precision intake valve sealing and durability separate winning builds from mediocre ones. The KIBBLEWHITE White Diamond™ valve delivers the reliability and heat resistance you need for sustained high-RPM performance, whether you're on the track or...09263145- SKU:
- 09263145
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH IMPERIAL:
- 3.245'
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 37.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- SIZE METRIC:
- STANDARD
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1960'
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Exhaust Valve 60-60273H
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01High-RPM combustion demands valves engineered to withstand extreme temperatures and repeated stress cycles without losing integrity. The KIBBLEWHITE White Diamond™ exhaust valve combines precision manufacturing with premium materials to deliver the...09263146- SKU:
- 09263146
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- HEAD DIAMETER METRIC:
- 29.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- SIZE METRIC:
- STANDARD
- TULIP ANGLE:
- 17°
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- STEM DIAMETER IMPERIAL:
- 0.1953'
- LENGTH IMPERIAL:
- 3.210'
- MODEL:
- WHITE DIAMOND™
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Intake Valve Guide 30-32821
KIBBLEWHITE
MSRP: $34.40Now: $30.96Was: $34.40Valve guide wear directly impacts cylinder head integrity, compression stability, and oil consumption—critical factors that separate a well-maintained engine from one headed for failure. The KIBBLEWHITE Intake Valve Guide 30-32821 delivers the thermal...09263148- SKU:
- 09263148
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.1960'
- MATERIAL:
- C630 BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4370'
- RIDING STYLE:
- OFF-ROAD
- SIZE IMPERIAL:
- OVERSIZE (+0.001')
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
MSRP: $34.40Now: $30.96Was: $34.40 -
On Sale
KIBBLEWHITE Intake Valve Guide 30-32822
KIBBLEWHITE
MSRP: $30.95Now: $27.86Was: $30.95Valve guide wear directly impacts combustion seal integrity and oil consumption—choosing the right replacement is critical for engine longevity. The KIBBLEWHITE 30-32822 Intake Valve Guide uses Ampco-45, a copper-nickel alloy engineered specifically for...09263149- SKU:
- 09263149
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4380'
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- OVERSIZE (+0.002')
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.1960'
- MATERIAL:
- C630 BRONZE
MSRP: $30.95Now: $27.86Was: $30.95 -
On Sale
KIBBLEWHITE Intake Valve 40-41412H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Intake valve reliability directly impacts engine efficiency and longevity—especially under high RPM and forced induction conditions. KIBBLEWHITE's White Diamond™ valves are precision-engineered from premium materials and finished with hard chrome plating...09263155- SKU:
- 09263155
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- HEAD DIAMETER METRIC:
- 31.00 MM
- LENGTH IMPERIAL:
- 3.460'
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1764'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- SIZE METRIC:
- STANDARD
- TULIP ANGLE:
- 20°
- APPLICATION:
- INTAKE
- UNITS:
- EACH
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve 40-41416H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55High-revving engines demand exhaust valves that can withstand extreme temperatures and sustained abuse without degradation. The KIBBLEWHITE White Diamond™ valve delivers the durability and precision fit that separates reliable power from catastrophic...09263156- SKU:
- 09263156
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TULIP ANGLE:
- 25°
- HEAD DIAMETER METRIC:
- 25.00 MM
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1759'
- LENGTH IMPERIAL:
- 3.170'
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- SIZE METRIC:
- STANDARD
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Intake Spring Kit 30-33200
KIBBLEWHITE
MSRP: $185.23Now: $166.71Was: $185.23Factory intake valves wear out—it's physics. The KIBBLEWHITE 30-33200 stainless steel conversion kit replaces them with components engineered to last 4x longer, keeping your valvetrain reliable through countless heat cycles and high-RPM demands. If...09263169- SKU:
- 09263169
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- ATV
- SPRING LIFT IMPERIAL:
- 0.440'
- SPRING LIFT:
- 0,440'
- SPRING OPEN PRESSURE:
- 147 LB
- SPRING SEAT PRESSURE:
- 40 LB
- TYPE:
- CONVERSION
- UNITS:
- KIT
MSRP: $185.23Now: $166.71Was: $185.23
