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
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PROX Valve Shim - 5 pack 29.948300
PROX
$9.95Valve shims are critical wear items in high-revving engines, and worn or improperly sized shims directly compromise valve clearance and engine efficiency. PROX Valve Shims deliver precision-machined accuracy and heat-treated hardness to maintain exact...09260978- SKU:
- 09260978
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- PRODUCT NAME:
- SHIM KIT
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- VALVE SHIM THICKNESS METRIC:
- 3.00 MM
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
PROX Valve Shim - 5 pack 29.948310
PROX
$9.95Valve shim clearance directly impacts valvetrain precision and engine reliability—improper sizing leads to unwanted noise, reduced sealing efficiency, and accelerated wear on critical components. PROX valve shims are precision-machined to exact...09260980- SKU:
- 09260980
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- SHIM KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 3.10 MM
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
PROX Valve Shim - 5 pack 29.948315
PROX
$9.95Valve shim clearance directly impacts engine reliability and performance—improper specs lead to valve train noise, reduced power, and premature wear. PROX Valve Shims are precision-machined to exact tolerances and heat-treated for superior hardness,...09260981- SKU:
- 09260981
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- SHIM KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- VALVE SHIM THICKNESS METRIC:
- 3.15 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- TYPE:
- VALVE
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
PROX Valve Shim - 5 pack 29.948325
PROX
$9.95Valve shimming is critical to maintaining precise valve clearances and preventing catastrophic engine damage from improper clearance tolerances. These PROX shims deliver consistency across your engine's valvetrain, eliminating guesswork and ensuring...09260983- SKU:
- 09260983
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- SHIM KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- VALVE SHIM THICKNESS METRIC:
- 3.25 MM
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
Wiseco Steel Valve Kit Honda CRF450R 2002-2006 SVKB1403
WISECO
$365.95High-mileage CRF450R engines demand valve components that can withstand aggressive riding conditions and frequent maintenance cycles. The Wiseco Steel Valve Kit SVKB1403 delivers OEM-quality intake and exhaust valves paired with precision springs...09263061- SKU:
- 09263061
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$365.95 -
Wiseco Valve Kit 2007-2008 Honda CRF450R SVKB1404
WISECO
$344.95If you're running a 2007-2008 Honda CRF450R and pushing hard on the track or trail, your factory valves and springs have limits. The Wiseco Valve Kit SVKB1404 delivers a complete matched set of steel valves and precision-engineered springs that handle...09263062- SKU:
- 09263062
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
$344.95Qty in Cart: 0Quantity:Price:$344.95Subtotal: -
Wiseco Valve Kit for 2010-2013 Yamaha YZ450F SVKB2440
WISECO
$344.95A complete valve kit is essential when rebuilding or upgrading your YZ450F engine—mismatched components or worn valves compromise combustion efficiency and reliability. The Wiseco SVKB2440 delivers OEM-quality matched intake and exhaust valves with...09263068- SKU:
- 09263068
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
$344.95Qty in Cart: 0Quantity:Price:$344.95Subtotal: -
XCELDYNE Valve Guide Kit - Exhaust CVGM13005
XCELDYNE
$36.63Valve guides are critical to engine longevity—they control oil consumption, maintain precise valve seating, and prevent catastrophic head damage. The XCELDYNE Valve Guide Kit delivers superior thermal management and stem lubrication, directly extending...09260608- SKU:
- 09260608
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- VALVE GUIDE
- MATERIAL:
- MANGANESE-BRONZE
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- UNITS:
- 2 PIECE
$36.63Qty in Cart: 0Quantity:Price:$36.63Subtotal: -
XCELDYNE Valve Spring Bucket XBT13101
XCELDYNE
$140.49If you're running high-lift cams and pushing higher RPMs, stock valve spring buckets become your weak point—introducing unwanted valve float, cylinder head wear, and lost power. The XCELDYNE XBT13101 brings Formula 1–grade engineering to your build,...09260623- SKU:
- 09260623
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING BUCKET
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- STEEL
$140.49Qty in Cart: 0Quantity:Price:$140.49Subtotal:
