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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KIBBLEWHITE Intake Valve Guide 80-80080
KIBBLEWHITE
$15.92Valve guide wear is one of the primary culprits behind oil consumption, rough idle, and lost compression in high-performance engines. The KIBBLEWHITE Intake Valve Guide 80-80080 replaces worn guides with precision-engineered components that restore seal...09260113- SKU:
- 09260113
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
- MATERIAL:
- C630 BRONZE
- INSIDE DIAMETER IMPERIAL:
- 0.1570'
- OUTSIDE DIAMETER IMPERIAL:
- 0.3563'
- SIZE IMPERIAL:
- STANDARD
$15.92 -
KIBBLEWHITE Exhaust Valve Guide 80-80090
KIBBLEWHITE
$15.92Valve guides are critical to engine longevity—they control oil consumption, maintain precise valve timing, and prevent catastrophic engine wear. The KIBBLEWHITE 80-80090 exhaust valve guide delivers superior heat dissipation and durability through...09260118- SKU:
- 09260118
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- VALVE GUIDE
- MATERIAL:
- C630 BRONZE
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER IMPERIAL:
- 0.1760'
- OUTSIDE DIAMETER IMPERIAL:
- 0.3958'
- SIZE IMPERIAL:
- STANDARD
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
$15.92 -
KIBBLEWHITE Intake Valve - YZ250F - Standard 80-80073
KIBBLEWHITE
$37.55The YZ250F demands intake valves that can handle sustained high RPM cycles without sacrificing precision or durability. KIBBLEWHITE's Black Diamond™ valves are purpose-built from premium EV8 stainless steel and engineered to minimize friction while...09260123- SKU:
- 09260123
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 23.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.1568'
- LENGTH IMPERIAL:
- 3.150'
- TULIP ANGLE:
- 25°
$37.55 -
KIBBLEWHITE Center Intake Valve - YZ250F - Standard 80-80075
KIBBLEWHITE
$37.55Valve durability directly impacts engine reliability and performance consistency, especially under high-RPM conditions where stock valves often show premature wear. The KIBBLEWHITE Center Intake Valve for YZ250F replaces weak OEM components with...09260124- SKU:
- 09260124
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- CENTER INTAKE
- LENGTH IMPERIAL:
- 3.095'
- MODEL:
- BLACK DIAMOND™
- TULIP ANGLE:
- 25°
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.1568'
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 23.00 MM
- RIDING STYLE:
- OFF-ROAD
$37.55 -
KIBBLEWHITE Exhaust Valve - YZ250F - Standard 80-80077
KIBBLEWHITE
$37.55Valve degradation is one of the fastest ways to lose compression and power in your YZ250F. The KIBBLEWHITE Exhaust Valve delivers the precision engineering and material science needed to withstand extreme combustion temperatures and repeated high-RPM...09260125- SKU:
- 09260125
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- HEAD DIAMETER METRIC:
- 24.50 MM
- TULIP ANGLE:
- 25°
- LENGTH IMPERIAL:
- 3.070'
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.1758'
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$37.55 -
KIBBLEWHITE Spring Kit 30-30590
KIBBLEWHITE
$229.93A properly functioning valve train is critical to engine reliability and performance, and worn or damaged springs compromise both. The KIBBLEWHITE Spring Kit 30-30590 delivers the precision engineering needed to restore or upgrade your valve train with...09260210- SKU:
- 09260210
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- SPRING LIFT IMPERIAL:
- 0.350'
- SPRING OPEN PRESSURE:
- 145 LB
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- MATERIAL:
- TITANIUM
$229.93 -
KIBBLEWHITE Intake Valve - CRF250R - Standard 30-30630
KIBBLEWHITE
$37.55Factory intake valves are prone to wear and carbon buildup, which directly impacts combustion efficiency and throttle response on your CRF250R. The Kibblewhite Black Diamond™ intake valve restores precision valve sealing while the proprietary multi-stage...09260211- SKU:
- 09260211
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- MODEL:
- BLACK DIAMOND™
- HEAD DIAMETER METRIC:
- 31.00 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1961'
- LENGTH IMPERIAL:
- 3.280'
$37.55 -
KIBBLEWHITE Exhaust Valve - CRF250R - Standard 30-30633
KIBBLEWHITE
$37.55Factory valve tolerances degrade quickly under high heat and combustion stress, robbing your CRF250R of reliability and peak performance. Kibblewhite's Black Diamond™ exhaust valves restore precision fit and durability through advanced materials and...09260213- SKU:
- 09260213
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- LENGTH IMPERIAL:
- 3.235'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MODEL:
- BLACK DIAMOND™
- HEAD DIAMETER METRIC:
- 26.00 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1956'
$37.55 -
KIBBLEWHITE Valve Spring Kit 60-60045
KIBBLEWHITE
$148.65Valve springs are the unsung foundation of reliable engine performance—they control valve timing precision and prevent float at high RPMs, which directly impacts power delivery and engine longevity. The KIBBLEWHITE 60-60045 kit delivers OEM-quality...09260215- SKU:
- 09260215
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- SPRING KIT
- APPLICATION:
- EXHAUST
- SPRING OPEN PRESSURE:
- 171 LB
- SPRING SEAT PRESSURE:
- 57 LB
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- SPRING LIFT:
- 0,440'
- SPRING LIFT IMPERIAL:
- 0.440'
- TYPE:
- VALVE
- UNITS:
- KIT
$148.65 -
KIBBLEWHITE Valve Spring Kit 30-30640
KIBBLEWHITE
$207.81High-RPM valve train stability demands springs engineered to precise specifications—Kibblewhite's 30-30640 kit delivers consistent seat pressure and reliable valve control across your entire power band. Whether you're running a stock rebuild or a heavily...09260137- SKU:
- 09260137
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- SPRING LIFT IMPERIAL:
- 0.440'
- APPLICATION:
- INTAKE
- SPRING OPEN PRESSURE:
- INTAKE 147 LB, EXHAUST 203 LB
- TYPE:
- VALVE
$207.81 -
KIBBLEWHITE Intake Valve 80-80872
KIBBLEWHITE
$37.55Intake valve performance directly impacts combustion efficiency, throttle response, and overall engine reliability—especially under high-RPM conditions where inferior valves fail prematurely. KIBBLEWHITE's Black Diamond™ valves are engineered to...09262918- SKU:
- 09262918
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 37.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- LENGTH IMPERIAL:
- 3.280'
- STEM DIAMETER IMPERIAL:
- 0.2158'
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
$37.55 -
KIBBLEWHITE Valve Spring Kit 80-81100
KIBBLEWHITE
$185.23If you're running high-RPM applications or extended track sessions, OEM titanium valve springs degrade quickly under sustained stress. The Kibblewhite 80-81100 stainless steel conversion kit replaces worn or marginal valvetrain components with...09262920- SKU:
- 09262920
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- INTAKE
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT IMPERIAL:
- 0.450'
- SPRING OPEN PRESSURE:
- 155 LB
- SPRING SEAT PRESSURE:
- 46 LB
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- SPRING LIFT:
- 0,450'
- UNITS:
- KIT
$185.23 -
KIBBLEWHITE Valve Spring Kit 96-96450
KIBBLEWHITE
$218.32If you're running a high-revving engine, valve spring failure is a real threat to reliability and performance. The KIBBLEWHITE Valve Spring Kit 96-96450 replaces your OEM titanium components with a purpose-engineered stainless steel conversion that...09262736- SKU:
- 09262736
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- RIDING STYLE:
- STREET
- SPRING LIFT IMPERIAL:
- 0.425'
- TYPE:
- CONVERSION
- PRODUCT NAME:
- VALVE KIT
- SPRING LIFT:
- 0,425'
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- SPRING OPEN PRESSURE:
- 169 LB
- MATERIAL:
- STAINLESS STEEL
- SPRING SEAT PRESSURE:
- 60 LB
$218.32 -
KIBBLEWHITE Valve Spring Kit 80-80950
KIBBLEWHITE
$303.29If you're running a high-revving engine that demands reliability, valve spring failure can sideline you unexpectedly. The KIBBLEWHITE 80-80950 Valve Spring Kit replaces wear-prone OEM titanium components with purpose-engineered stainless steel internals...09262739- SKU:
- 09262739
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- ATV
- SPRING LIFT IMPERIAL:
- 0.380'
- SPRING OPEN PRESSURE:
- 86 LB
- TYPE:
- CONVERSION
- PRODUCT NAME:
- VALVE KIT
- SPRING SEAT PRESSURE:
- 39 LB
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- SPRING LIFT:
- 0,380'
$303.29 -
KIBBLEWHITE Intake Valve - Honda 30-30630T
KIBBLEWHITE
$92.51If you're serious about maximizing your Honda's engine efficiency and reliability, a premium intake valve is non-negotiable. The Kibblewhite Tensilite® intake valve delivers superior heat resistance and durability under extreme combustion pressures,...09262740- SKU:
- 09262740
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- HEAD DIAMETER METRIC:
- 31.00 MM
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 20°
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1960'
- UNITS:
- EACH
$92.51 -
KIBBLEWHITE Intake Valve - Honda 30-31462T
KIBBLEWHITE
$109.33High-revving Honda engines demand intake valves that can handle extreme temperatures and repeated impact cycles without degrading. The KIBBLEWHITE Tensilite® intake valve delivers the durability and precision you need to build an engine that performs...09262742- SKU:
- 09262742
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 30.50 MM
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1960'
$109.33 -
KIBBLEWHITE Intake Valve - Kawasaki 40-40140T
KIBBLEWHITE
$92.51High-rpm engine reliability hinges on valve durability, and intake valve wear directly impacts combustion efficiency and power delivery. The KIBBLEWHITE Tensilite® intake valve combines aerospace-grade titanium with precision CNC machining to withstand...09262746- SKU:
- 09262746
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- HEAD DIAMETER METRIC:
- 31.00 MM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1765'
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
$92.51 -
KIBBLEWHITE Exhaust Valve - Kawasaki 40-40143T
KIBBLEWHITE
$92.51High-revving engines demand valves that can withstand extreme thermal and mechanical stress without compromise. KIBBLEWHITE Tensilite® exhaust valves are engineered from premium titanium forgings and finished with a specialized coating that reduces...09262747- SKU:
- 09262747
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- STEM DIAMETER IMPERIAL:
- 0.1756'
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 25°
- HEAD DIAMETER METRIC:
- 25.00 MM
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- UNITS:
- EACH
$92.51 -
KIBBLEWHITE Exhaust Valve - KTM 96-96166T
KIBBLEWHITE
$100.95Exhaust valves are critical to engine efficiency, and cheap units fail under the thermal and mechanical stress of sustained performance. KIBBLEWHITE's Tensilite® exhaust valves deliver the durability and reliability your engine demands, whether you're...09262753- SKU:
- 09262753
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
- TULIP ANGLE:
- 30°
- HEAD DIAMETER METRIC:
- 31.70 MM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.2353'
- RIDING STYLE:
- OFF-ROAD
$100.95 -
KIBBLEWHITE Intake Valve - KTM 96-96212T
KIBBLEWHITE
$134.56Intake valve performance directly impacts combustion efficiency and engine longevity—especially in high-RPM applications where thermal stress and wear accelerate rapidly. Kibblewhite's Tensilite® valves are precision-forged from aerospace-grade titanium...09262754- SKU:
- 09262754
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- HEAD DIAMETER METRIC:
- 39.95 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.2350'
- TULIP ANGLE:
- 15°
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- UNITS:
- EACH
$134.56
