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
-
MOOSE RACING Valve Shim - 7.48 x 1.25 - 5 pack MSE5PK748125
MOOSE RACING
$9.95Proper valve clearance is critical for engine performance, reliability, and longevity—and maintaining it requires the right shims on hand. The MOOSE RACING Valve Shim 5-pack gives you precision-engineered replacements ready for any valve train...09261859- SKU:
- 09261859
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- VALVE SHIM THICKNESS METRIC:
- 1.25 MM
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- 5 PACK
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
MOOSE RACING Valve Shim - 7.48 x 2.85 - 5 pack MSE5PK748285
MOOSE RACING
$9.95Valve train maintenance demands precision, and these MOOSE RACING shims deliver it. Forged from 4140 cold rolled steel—not sintered material—they maintain tight tolerances through repeated thermal cycles and adjustment procedures. The laser-etched sizing...09261891- SKU:
- 09261891
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- MATERIAL:
- ROLLED
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- VALVE SHIM THICKNESS METRIC:
- 2.85 MM
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
MOOSE RACING Valve Shim - 7.48 x 2.90 - 5 pack MSE5PK748290
MOOSE RACING
$9.95Valve shim maintenance demands precision components you can trust, and this 5-pack delivers exactly that. Forged from 4140 cold-rolled steel—not sintered—these shims resist deformation under valve spring pressure while maintaining accurate clearance...09261892- SKU:
- 09261892
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- VALVE SHIM THICKNESS METRIC:
- 2.90 MM
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
MOOSE RACING Valve Shim - 7.48 x 3.00 - 5 pack MSE5PK748300
MOOSE RACING
$9.95Proper valve clearance is critical to engine performance and longevity—too tight and you'll lose power, too loose and you risk valve float and catastrophic damage. MOOSE RACING valve shims give you precise adjustment capability without guesswork, and...09261894- SKU:
- 09261894
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- VALVE SHIM THICKNESS METRIC:
- 3.00 MM
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- UNITS:
- 5 PACK
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
MOOSE RACING Valve Shim - 7.48 x 3.05 - 5 pack MSE5PK748305
MOOSE RACING
$9.95Maintaining precise valve clearances is non-negotiable for engine longevity and consistent performance across heat cycles. These MOOSE RACING valve shims eliminate guesswork during valve train service by providing accurate, individually identifiable...09261895- SKU:
- 09261895
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- VALVE SHIM THICKNESS METRIC:
- 3.05 MM
- MATERIAL:
- ROLLED
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
- OUTSIDE DIAMETER METRIC:
- 7.48 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
MOOSE RACING Valve Shim - 9.48 x 2.85 - 5 pack MSE5PK948285
MOOSE RACING
$9.95Proper valve clearance is critical to engine performance and longevity—and maintaining accurate shim specs means the difference between a finely-tuned engine and costly valve train damage. MOOSE RACING valve shims give you precision-engineered components...09261961- SKU:
- 09261961
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ATV
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- VALVE SHIM THICKNESS METRIC:
- 2.85 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- ROLLED
- MATERIAL:
- STEEL
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- UNITS:
- 5 PACK
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal: -
MOOSE RACING Valve Shim - 9.48 x 2.95 - 5 pack MSE5PK948295
MOOSE RACING
$9.95Valve train maintenance requires precision—and guesswork doesn't belong in your engine bay. These MOOSE RACING valve shims give you the exact sizing and durability needed to dial in your valve clearances without the frustration of hunting down individual...09261963- SKU:
- 09261963
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- OUTSIDE DIAMETER METRIC:
- 9.48 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- VALVE SHIM THICKNESS METRIC:
- 2.95 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- MATERIAL:
- ROLLED
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- VALVE
- UNITS:
- 5 PACK
$9.95 -
DEL WEST Intake Valve DW-KX450F-IV09
DEL WEST
$155.95When you're pushing your KX450F to its limits in competitive off-road conditions, valve reliability becomes non-negotiable. The DEL WEST Intake Valve DW-KX450F-IV09 is engineered to withstand extreme temperatures, aggressive combustion cycles, and the...09261058- SKU:
- 09261058
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
$155.95 -
DEL WEST Intake Valve DW-KX450F-IV06
DEL WEST
$155.95When you're pushing your KX450F to its limits in high-RPM off-road conditions, valve reliability becomes non-negotiable. The DEL WEST Intake Valve DW-KX450F-IV06 is engineered to withstand the extreme thermal and mechanical demands of competition riding,...09261057- SKU:
- 09261057
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
$155.95 -
On Sale
KIBBLEWHITE Spring Kit 30-30015
KIBBLEWHITE
MSRP: $156.91Now: $141.22Was: $156.91Valve spring integrity is critical to engine reliability, especially in high-RPM applications where stock springs can't handle sustained load cycles. The KIBBLEWHITE Spring Kit 30-30015 delivers precise spring rates and titanium upper collars engineered...KW3030015- SKU:
- KW3030015
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- SPRING OPEN PRESSURE:
- 185 LB
- TYPE:
- VALVE
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
- SPRING LIFT IMPERIAL:
- 0.400'
- UNITS:
- KIT
MSRP: $156.91Now: $141.22Was: $156.91Qty in Cart: 0Quantity:Price:MSRP: $156.91Now: $141.22Was: $156.91Subtotal: -
On Sale
KIBBLEWHITE Intake Valve 30-3003
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55If you're building a high-revving engine or restoring a race-proven platform, intake valve quality directly impacts combustion efficiency, thermal management, and long-term reliability. KIBBLEWHITE's Black Diamond™ valves are engineered to withstand...KW303003- SKU:
- KW303003
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- HEAD DIAMETER METRIC:
- 36.00 MM
- LENGTH IMPERIAL:
- 4.165'
- MODEL:
- BLACK DIAMOND™
- TULIP ANGLE:
- 23°
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.2590'
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve 30-3004
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Valve degradation directly impacts combustion efficiency, throttle response, and engine longevity—especially under sustained high-RPM operation. The KIBBLEWHITE Black Diamond™ Exhaust Valve (30-3004) combats this with precision engineering and material...KW303004- SKU:
- KW303004
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.2585'
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- HEAD DIAMETER METRIC:
- 31.00 MM
- LENGTH IMPERIAL:
- 4.095'
- MODEL:
- BLACK DIAMOND™
- TULIP ANGLE:
- 29°
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Intake Valve 30-30073
KIBBLEWHITE
MSRP: $54.10Now: $48.69Was: $54.10If you're serious about maximizing valve longevity and engine efficiency, the KIBBLEWHITE Black Diamond™ Intake Valve delivers the durability and precision engineering that separates reliable performance from constant rebuilds. Purpose-built from premium...KW3030073- SKU:
- KW3030073
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD DIAMETER METRIC:
- 28.50 MM
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1960'
- APPLICATION:
- INTAKE
- MODEL:
- BLACK DIAMOND™
- LENGTH IMPERIAL:
- 3.805'
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 23°
- UNITS:
- EACH
MSRP: $54.10Now: $48.69Was: $54.10Qty in Cart: 0Quantity:Price:MSRP: $54.10Now: $48.69Was: $54.10Subtotal: -
On Sale
KIBBLEWHITE Spring Kit 30-30077
KIBBLEWHITE
MSRP: $130.65Now: $117.59Was: $130.65A quality valve spring kit is fundamental to reliable engine performance, and the KIBBLEWHITE Spring Kit 30-30077 delivers the precision engineering required for consistent valve train operation across a wide range of applications. Whether you're...KW3030077- SKU:
- KW3030077
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- SPRING LIFT IMPERIAL:
- 0.355'
- SPRING OPEN PRESSURE:
- 150 LB
- TYPE:
- VALVE
- MATERIAL:
- TITANIUM
MSRP: $130.65Now: $117.59Was: $130.65 -
On Sale
KIBBLEWHITE Exhaust Valve 30-30083
KIBBLEWHITE
MSRP: $54.10Now: $48.69Was: $54.10Exhaust valves endure extreme heat cycles and abrasive combustion byproducts—factory units often fail prematurely, costing you downtime and reliability. The Kibblewhite Black Diamond™ exhaust valve delivers measurable durability gains through precision...KW3030083- SKU:
- KW3030083
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH IMPERIAL:
- 3.775'
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- HEAD DIAMETER METRIC:
- 23.50 MM
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- MODEL:
- BLACK DIAMOND™
- STEM DIAMETER IMPERIAL:
- 0.2155'
- TULIP ANGLE:
- 29°
MSRP: $54.10Now: $48.69Was: $54.10Qty in Cart: 0Quantity:Price:MSRP: $54.10Now: $48.69Was: $54.10Subtotal: -
On Sale
KIBBLEWHITE Cast Iron Valve Seat 10-SC320
KIBBLEWHITE
MSRP: $8.62Now: $7.76Was: $8.62Valve seat recession and microwelding failures can compromise engine reliability and performance in high-demand applications. The KIBBLEWHITE Cast Iron Valve Seat 10-SC320 uses advanced powdered metal technology to deliver exceptional hardness and...09261633- SKU:
- 09261633
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- INSIDE DIAMETER METRIC:
- 24.00 MM
- PRODUCT NAME:
- VALVE SEAT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 32.00 MM
- OUTSIDE DIAMETER METRIC:
- 32.00 MM
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- VALVE SEAT HEIGHT METRIC:
- 9.50 MM
MSRP: $8.62Now: $7.76Was: $8.62 -
On Sale
KIBBLEWHITE Cast Iron Valve Seat 10-SC330
KIBBLEWHITE
MSRP: $8.75Now: $7.88Was: $8.75Valve seat recession and microwelding are silent killers in high-rpm applications—they compromise combustion sealing and accelerate wear, especially under boost or alternative fuels. The KIBBLEWHITE Cast Iron Valve Seat 10-SC330 is engineered with a...09261634- SKU:
- 09261634
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- HEAD DIAMETER METRIC:
- 33.00 MM
- INSIDE DIAMETER METRIC:
- 24.00 MM
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER METRIC:
- 33.00 MM
- PRODUCT NAME:
- VALVE SEAT
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- VALVE SEAT HEIGHT METRIC:
- 9.50 MM
MSRP: $8.75Now: $7.88Was: $8.75 -
On Sale
KIBBLEWHITE Cast Iron Valve Seat 10-SC340
KIBBLEWHITE
MSRP: $8.89Now: $8.00Was: $8.89Valve seat recession and microwelding are silent killers of engine durability, especially in high-rpm and forced induction applications. Kibblewhite's cast iron valve seats use advanced powdered metal technology to deliver uniform hardness and...09261635- SKU:
- 09261635
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
- OUTSIDE DIAMETER METRIC:
- 34.00 MM
- PRODUCT NAME:
- VALVE SEAT
- INSIDE DIAMETER METRIC:
- 26.00 MM
- MATERIAL:
- STEEL
- HEAD DIAMETER METRIC:
- 34.00 MM
- RIDING STYLE:
- OFF-ROAD
- VALVE SEAT HEIGHT METRIC:
- 9.50 MM
MSRP: $8.89Now: $8.00Was: $8.89 -
On Sale
KIBBLEWHITE Intake Valve 30-30221
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01Intake valve performance directly impacts combustion efficiency, throttle response, and overall engine reliability—especially under high RPM conditions where factory valves often fall short. The KIBBLEWHITE Black Diamond™ 30-30221 delivers superior...20080221- SKU:
- 20080221
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- LENGTH IMPERIAL:
- 3.325'
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- STEM DIAMETER IMPERIAL:
- 0.2158'
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 37.00 MM
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 20°
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Exhaust Valve 30-30223
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01Exhaust valves are critical to engine reliability and performance—they're exposed to extreme heat and wear cycles that demand uncompromising durability. The KIBBLEWHITE Black Diamond™ valve delivers the precision engineering and material quality required...20080223- SKU:
- 20080223
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- HEAD DIAMETER METRIC:
- 31.00 MM
- LENGTH IMPERIAL:
- 3.310'
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1957'
- TULIP ANGLE:
- 20°
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- MODEL:
- BLACK DIAMOND™
MSRP: $31.01Now: $27.91Was: $31.01
