Dirt Bike Engine Valves and Parts
Dirt Bike Engine Valves & Parts: Kibblewhite Black Diamond Exhaust Valves & Spring Kits at JJ Motorsports
Upgrade your dirt bike's valvetrain for maximum flow, heat resistance, and durability with premium valves and parts from JJ Motorsports, precision-engineered for superior performance in motocross, enduro, and trail riding. Our selection includes Black Diamond stainless steel exhaust valves, high-RPM spring kits, keepers, seals, and guides designed for increased lift, reduced wear, and reliable operation under extreme valve float conditions. Compatible with popular 4-stroke models like Honda CRF, Yamaha YZ/WR, KTM SX/EXC, and more, these Kibblewhite components feature one-piece forging, nitride coatings, and dual-spring technology to enhance airflow, prevent valve train failure, and support big-bore or high-compression builds. From exhaust valves with swirl-polished stems to titanium retainer spring kits for lightweight strength, rebuild your cylinder head for championship-level power, longevity, and confidence on every rev.
Shop trusted brands like Kibblewhite for race-proven quality. Explore related categories such as dirt bike piston and ring kits for full top-end rebuilds or dirt bike engine for camshafts and gaskets.
Top Dirt Bike Valve & Parts
- Kibblewhite Valve - Exhaust - Black Diamond 30-33616 – One-piece Black Diamond stainless steel exhaust valve with nitride coating, swirl-polished stem, and hard tip; designed for high-RPM durability and flow in 4-stroke engines.
- Kibblewhite Spring Kit 40-41600 – Dual-spring kit with titanium retainers, chromoly seats, and high-strength springs; supports increased lift and RPM while preventing valve float in performance builds.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
KIBBLEWHITE Spring Kit 40-40100
KIBBLEWHITE
MSRP: $220.26Now: $198.23Was: $220.26A valve spring kit is fundamental to any serious engine build—weak or worn springs compromise valve timing, reduce horsepower, and accelerate component wear. The KIBBLEWHITE Spring Kit 40-40100 delivers the precision engineering and durability required...09260167- SKU:
- 09260167
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- SPRING OPEN PRESSURE:
- 155 LB
- TYPE:
- VALVE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- SPRING LIFT IMPERIAL:
- 0.445'
MSRP: $220.26Now: $198.23Was: $220.26 -
On Sale
KIBBLEWHITE Intake Valve - KX/RMZ - Standard 40-40140H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Intake valve performance directly impacts combustion efficiency and engine responsiveness—particularly critical on KX/RMZ platforms where precision tolerances demand uncompromising quality. KIBBLEWHITE's Black Diamond™ valves combine superior metallurgy...09260170- SKU:
- 09260170
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MODEL:
- BLACK DIAMOND™
- STEM DIAMETER IMPERIAL:
- 0.1765'
- APPLICATION:
- INTAKE
- LENGTH IMPERIAL:
- 3.120'
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 31.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 20°
- RIDING STYLE:
- OFF-ROAD
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve - KX/RMZ - Standard 40-40143H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Exhaust valves are engineered for extreme abuse—constant thermal cycling, combustion pressures, and high RPMs demand materials that won't degrade. The Kibblewhite Black Diamond™ valve gives you factory-proven durability with measurably reduced friction,...09260172- SKU:
- 09260172
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TULIP ANGLE:
- 25°
- STEM DIAMETER IMPERIAL:
- 0.1756'
- APPLICATION:
- EXHAUST
- LENGTH IMPERIAL:
- 3.125'
- MODEL:
- BLACK DIAMOND™
- HEAD DIAMETER METRIC:
- 25.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Intake Valve 80-80214H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Intake valve performance directly impacts your engine's breathing efficiency, combustion timing, and overall power output. KIBBLEWHITE's White Diamond™ valves eliminate the weak link in your cylinder head with precision engineering and superior materials...09260107- SKU:
- 09260107
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- HEAD DIAMETER METRIC:
- 28.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- TULIP ANGLE:
- 15°
- UNITS:
- EACH
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1765'
- LENGTH IMPERIAL:
- 3.030'
- SIZE METRIC:
- OVERSIZE
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Intake Valve 80-80215H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55When you're pushing peak RPMs on track, valve integrity becomes non-negotiable. KIBBLEWHITE's White Diamond™ intake valves are precision-forged from premium EV8 stainless steel or Inconel-751, then hard chrome plated to withstand extreme heat cycles and...09260108- SKU:
- 09260108
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- STEM DIAMETER IMPERIAL:
- 0.1765'
- HEAD DIAMETER METRIC:
- 27.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- SIZE METRIC:
- STANDARD
- APPLICATION:
- CENTER INTAKE
- LENGTH IMPERIAL:
- 3.000'
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MODEL:
- WHITE DIAMOND™
- TULIP ANGLE:
- 15°
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Intake Valve 80-80216H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55If you're serious about top-end reliability and consistent performance, valve quality directly impacts your engine's ability to sustain high RPMs and maintain precise combustion timing. KIBBLEWHITE's White Diamond™ intake valves are engineered to...09260109- SKU:
- 09260109
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- STEM DIAMETER IMPERIAL:
- 0.1765'
- APPLICATION:
- CENTER INTAKE
- LENGTH IMPERIAL:
- 2.990'
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 28.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
- SIZE METRIC:
- OVERSIZE
- TULIP ANGLE:
- 15°
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve 80-80218H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55High-revving engines demand valve integrity that won't compromise under extreme heat and pressure. KIBBLEWHITE's White Diamond™ exhaust valves deliver the durability and precision tolerances that separate reliable performance from catastrophic failure...09260111- SKU:
- 09260111
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- LENGTH IMPERIAL:
- 2.945'
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1956'
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 29.00 MM
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- SIZE METRIC:
- OVERSIZE
- TULIP ANGLE:
- 20°
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Spring Kit 80-80066
KIBBLEWHITE
MSRP: $317.71Now: $285.94Was: $317.71A quality valve spring kit is fundamental to reliable engine performance, especially if you're pushing higher RPMs or running forced induction. The KIBBLEWHITE Spring Kit 80-80066 delivers the consistent valve control and durability required for serious...09260112- SKU:
- 09260112
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT IMPERIAL:
- 0.380'
- SPRING OPEN PRESSURE:
- 86 LB
MSRP: $317.71Now: $285.94Was: $317.71 -
On Sale
KIBBLEWHITE Intake Valve Guide 80-80080
KIBBLEWHITE
MSRP: $15.92Now: $14.33Was: $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
MSRP: $15.92Now: $14.33Was: $15.92 -
On Sale
KIBBLEWHITE Exhaust Valve Guide 80-80090
KIBBLEWHITE
MSRP: $15.92Now: $14.33Was: $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
MSRP: $15.92Now: $14.33Was: $15.92 -
On Sale
KIBBLEWHITE Intake Valve - YZ250F - Standard 80-80073
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $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°
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Center Intake Valve - YZ250F - Standard 80-80075
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $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
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve - YZ250F - Standard 80-80077
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $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
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Spring Kit 30-30590
KIBBLEWHITE
MSRP: $229.93Now: $206.94Was: $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
MSRP: $229.93Now: $206.94Was: $229.93 -
On Sale
KIBBLEWHITE Intake Valve - CRF250R - Standard 30-30630
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $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'
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve - CRF250R - Standard 30-30633
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $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'
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Valve Spring Kit 60-60045
KIBBLEWHITE
MSRP: $148.65Now: $133.79Was: $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
MSRP: $148.65Now: $133.79Was: $148.65 -
On Sale
KIBBLEWHITE Valve Spring Kit 30-30640
KIBBLEWHITE
MSRP: $207.81Now: $187.03Was: $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
MSRP: $207.81Now: $187.03Was: $207.81 -
On Sale
KIBBLEWHITE Valve Spring Kit 80-80100
KIBBLEWHITE
MSRP: $221.92Now: $199.73Was: $221.92Valve spring degradation is one of the most common causes of performance loss and catastrophic engine failure in high-revving applications. The KIBBLEWHITE Valve Spring Kit 80-80100 delivers the consistent lift, seat pressure, and durability required to...09260249- SKU:
- 09260249
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT IMPERIAL:
- 0.375'
- SPRING OPEN PRESSURE:
- 85 LB
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
- MATERIAL:
- TITANIUM
- UNITS:
- KIT
MSRP: $221.92Now: $199.73Was: $221.92Qty in Cart: 0Quantity:Price:MSRP: $221.92Now: $199.73Was: $221.92Subtotal: -
On Sale
KIBBLEWHITE Intake Valve 80-80872
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $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°
MSRP: $37.55Now: $33.80Was: $37.55
