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 Intake/Exhaust Valve Guide 30-4069
KIBBLEWHITE
MSRP: $26.89Now: $24.20Was: $26.89Valve guide wear is one of the most common causes of oil consumption, poor ring sealing, and valve seat degradation in high-performance engines. The KIBBLEWHITE 30-4069 Intake/Exhaust Valve Guide delivers the thermal conductivity and wear resistance...KW304069- SKU:
- KW304069
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.2155'
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- MATERIAL:
- AMPCO-45
- PRODUCT NAME:
- VALVE GUIDE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4372'
- APPLICATION:
- EXHAUST
- SIZE IMPERIAL:
- STANDARD
- UNITS:
- EACH
MSRP: $26.89Now: $24.20Was: $26.89 -
On Sale
KIBBLEWHITE Valve Seat 10-SB250
KIBBLEWHITE
MSRP: $30.30Now: $27.27Was: $30.30If you're running titanium valves in a high-performance engine, your valve seats need to match that precision. KIBBLEWHITE's copper-based seats deliver the thermal conductivity and wear resistance required to keep up with aggressive valve timing and...09261619- SKU:
- 09261619
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE SEAT
- VALVE SEAT HEIGHT METRIC:
- 9.00 MM
- INSIDE DIAMETER METRIC:
- 17.00 MM
- OUTSIDE DIAMETER METRIC:
- 25.00 MM
- RIDING STYLE:
- OFF-ROAD
MSRP: $30.30Now: $27.27Was: $30.30 -
On Sale
KIBBLEWHITE Valve Seat 10-SB280
KIBBLEWHITE
MSRP: $30.30Now: $27.27Was: $30.30If you're running titanium valves in a high-performance engine, valve seat material directly impacts your engine's thermal stability, durability, and longevity under sustained boost or high RPM. KIBBLEWHITE's copper-based valve seats were engineered...09261620- SKU:
- 09261620
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- VALVE SEAT
- APPLICATION:
- EXHAUST
- VALVE SEAT HEIGHT METRIC:
- 9.50 MM
- OUTSIDE DIAMETER METRIC:
- 28.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- INSIDE DIAMETER METRIC:
- 20.00 MM
- MATERIAL:
- TITANIUM
MSRP: $30.30Now: $27.27Was: $30.30 -
On Sale
KIBBLEWHITE Valve Seat 10-SB350
KIBBLEWHITE
MSRP: $34.71Now: $31.24Was: $34.71If you're running titanium valves in a high-performance application, valve seat material matters—a lot. KIBBLEWHITE's copper-based seats deliver superior thermal conductivity and wear resistance, keeping your engine reliable across extended racing duty...09261626- SKU:
- 09261626
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- TITANIUM
- INSIDE DIAMETER METRIC:
- 26.00 MM
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER METRIC:
- 35.00 MM
- PRODUCT NAME:
- VALVE SEAT
- UNITS:
- EACH
- VALVE SEAT HEIGHT METRIC:
- 11.00 MM
MSRP: $34.71Now: $31.24Was: $34.71 -
On Sale
KIBBLEWHITE Valve Seat 10-SB385
KIBBLEWHITE
MSRP: $40.81Now: $36.73Was: $40.81If you're running titanium valves in a high-performance engine, your valve seats need to match that precision. The KIBBLEWHITE 10-SB385 is purpose-built to handle the thermal demands and wear patterns titanium creates, ensuring reliable seating and...09261627- SKU:
- 09261627
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- INSIDE DIAMETER METRIC:
- 29.00 MM
- MATERIAL:
- TITANIUM
- VALVE SEAT HEIGHT METRIC:
- 11.00 MM
- OUTSIDE DIAMETER METRIC:
- 38.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE SEAT
MSRP: $40.81Now: $36.73Was: $40.81 -
On Sale
KIBBLEWHITE Valve Seat 10-SB390
KIBBLEWHITE
MSRP: $40.81Now: $36.73Was: $40.81If you're running titanium valves in a high-performance engine, your valve seats are the critical interface between extreme heat and precision engineering. KIBBLEWHITE's copper-based seat design delivers the thermal conductivity and wear resistance...09261628- SKU:
- 09261628
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- INSIDE DIAMETER METRIC:
- 30.00 MM
- MATERIAL:
- TITANIUM
- OUTSIDE DIAMETER METRIC:
- 39.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- VALVE SEAT HEIGHT METRIC:
- 11.00 MM
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE SEAT
MSRP: $40.81Now: $36.73Was: $40.81 -
On Sale
KIBBLEWHITE Cast Iron Valve Seat 10-SC290
KIBBLEWHITE
MSRP: $8.24Now: $7.42Was: $8.24If you're running high-RPM applications or alternative fuels—whether it's nitrous, forced induction, or methanol—your valve seats need to withstand extreme thermal stress and microwelding without recession. The KIBBLEWHITE Cast Iron Valve Seat 10-SC290...09261631- SKU:
- 09261631
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER METRIC:
- 21.00 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- VALVE SEAT HEIGHT METRIC:
- 9.50 MM
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 29.00 MM
- MATERIAL:
- STEEL
- OUTSIDE DIAMETER METRIC:
- 29.00 MM
- PRODUCT NAME:
- VALVE SEAT
MSRP: $8.24Now: $7.42Was: $8.24 -
On Sale
KIBBLEWHITE Cast Iron Valve Seat 10-SC310
KIBBLEWHITE
MSRP: $8.49Now: $7.64Was: $8.49Valve seat recession is one of the most insidious problems in high-performance engines—it silently erodes compression, destroys your power curve, and forces expensive rebuilds. The KIBBLEWHITE Cast Iron Valve Seat 10-SC310 eliminates this failure mode...09261632- SKU:
- 09261632
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- INSIDE DIAMETER METRIC:
- 23.00 MM
- VALVE SEAT HEIGHT METRIC:
- 9.50 MM
- HEAD DIAMETER METRIC:
- 31.00 MM
- MATERIAL:
- STEEL
- OUTSIDE DIAMETER METRIC:
- 31.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE SEAT
- RIDING STYLE:
- ATV
MSRP: $8.49Now: $7.64Was: $8.49 -
On Sale
KIBBLEWHITE Cast Iron Valve Seat 10-SC390
KIBBLEWHITE
MSRP: $9.57Now: $8.61Was: $9.57Valve seat recession and microwelding are silent killers in high-performance engines—they compromise combustion efficiency, increase blow-by, and shorten engine life. The KIBBLEWHITE Cast Iron Valve Seat 10-SC390 uses advanced powdered metal technology...09261638- SKU:
- 09261638
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- VALVE SEAT
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- INSIDE DIAMETER METRIC:
- 30.00 MM
- OUTSIDE DIAMETER METRIC:
- 39.00 MM
- HEAD DIAMETER METRIC:
- 39.00 MM
- VALVE SEAT HEIGHT METRIC:
- 10.00 MM
MSRP: $9.57Now: $8.61Was: $9.57Qty in Cart: 0Quantity:Price:MSRP: $9.57Now: $8.61Was: $9.57Subtotal: -
On Sale
KIBBLEWHITE Spring Kit - .440" 30-31250
KIBBLEWHITE
MSRP: $207.83Now: $187.05Was: $207.83Valve spring performance directly impacts your engine's ability to maintain precise valve timing under high RPM conditions. The KIBBLEWHITE Spring Kit delivers consistent lift and closure across the entire rev range, preventing valve float that...09261640- SKU:
- 09261640
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT IMPERIAL:
- 0.440'
- SPRING OPEN PRESSURE:
- INTAKE 147 LB, EXHAUST 203 LB
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE
- MATERIAL:
- TITANIUM
MSRP: $207.83Now: $187.05Was: $207.83Qty in Cart: 0Quantity:Price:MSRP: $207.83Now: $187.05Was: $207.83Subtotal: -
On Sale
KIBBLEWHITE Exhaust Valve 30-31266
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01Exhaust valves are critical to engine reliability and performance—they endure extreme heat cycling and high-velocity gas flow that demands superior material integrity. KIBBLEWHITE's Black Diamond™ valves are engineered to withstand these demanding...09261643- SKU:
- 09261643
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- HEAD DIAMETER METRIC:
- 30.00 MM
- LENGTH IMPERIAL:
- 3.175'
- TULIP ANGLE:
- 20°
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.1955'
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MODEL:
- BLACK DIAMOND™
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Exhaust Valve 40-40416
KIBBLEWHITE
MSRP: $31.01Now: $27.91Was: $31.01Exhaust valves endure extreme thermal cycling and chemical exposure—factory components often succumb to carbon buildup, corrosion, and premature wear. The Kibblewhite Black Diamond™ Exhaust Valve (40-40416) is engineered to outlast OEM parts by combining...09261651- SKU:
- 09261651
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- UTV
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.1955'
- HEAD DIAMETER METRIC:
- 26.00 MM
- LENGTH IMPERIAL:
- 3.655'
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- ATV
- TULIP ANGLE:
- 10°
- UNITS:
- EACH
MSRP: $31.01Now: $27.91Was: $31.01 -
On Sale
KIBBLEWHITE Valve Guide 40-40420
KIBBLEWHITE
MSRP: $19.83Now: $17.85Was: $19.83Valve guide wear is one of the most overlooked causes of oil consumption and compression loss in high-performance engines. The KIBBLEWHITE Valve Guide 40-40420 uses premium Ampco-45 composition to deliver the thermal conductivity and wear resistance your...09261653- SKU:
- 09261653
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.1955'
- RIDING STYLE:
- UTV
- APPLICATION:
- INTAKE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4160'
- PRODUCT NAME:
- VALVE GUIDE
- MATERIAL:
- C630 BRONZE
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- ATV
- SIZE IMPERIAL:
- STANDARD
- UNITS:
- EACH
MSRP: $19.83Now: $17.85Was: $19.83 -
On Sale
KIBBLEWHITE Exhaust Valve 60-60210H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Exhaust valves experience extreme thermal and mechanical stress, and OEM units often succumb to wear, carbon buildup, and corrosion—compromising engine efficiency and reliability. The KIBBLEWHITE Black Diamond™ 60-60210H delivers precision-engineered...09261656- SKU:
- 09261656
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 20°
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- LENGTH IMPERIAL:
- 3.120'
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 31.00 MM
- MODEL:
- BLACK DIAMOND™
- STEM DIAMETER IMPERIAL:
- 0.1765'
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Exhaust Valve 60-60213H
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55If you're building a high-revving engine that demands reliability under extreme conditions, valve quality directly impacts combustion efficiency, longevity, and peak horsepower. KIBBLEWHITE's Black Diamond™ exhaust valves are engineered to withstand...09261658- SKU:
- 09261658
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD DIAMETER METRIC:
- 25.00 MM
- STEM DIAMETER IMPERIAL:
- 0.1756'
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 25°
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- LENGTH IMPERIAL:
- 3.115'
- MODEL:
- BLACK DIAMOND™
MSRP: $37.55Now: $33.80Was: $37.55 -
On Sale
KIBBLEWHITE Spring Kit - .445" 60-60500
KIBBLEWHITE
MSRP: $220.26Now: $198.23Was: $220.26Valve spring integrity directly impacts engine reliability and performance across the entire RPM band. This KIBBLEWHITE Spring Kit delivers precisely engineered spring rates and damping characteristics, ensuring consistent valve control whether you're...09261660- SKU:
- 09261660
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- SPRING LIFT IMPERIAL:
- 0.445'
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- SPRING KIT
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- SPRING OPEN PRESSURE:
- 160 LB
- UNITS:
- KIT
MSRP: $220.26Now: $198.23Was: $220.26 -
On Sale
KIBBLEWHITE Valve Guide 60-60520
KIBBLEWHITE
MSRP: $17.83Now: $16.05Was: $17.83Valve guide wear is one of the most common failure points in high-performance engines, leading to oil consumption, blow-by, and reduced ring sealing. The KIBBLEWHITE Valve Guide 60-60520 is engineered with Ampco-45 bronze to handle the extreme thermal...09261665- SKU:
- 09261665
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- VALVE GUIDE
- MATERIAL:
- C630 BRONZE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.1765'
- OUTSIDE DIAMETER IMPERIAL:
- 0.3778'
- SIZE IMPERIAL:
- STANDARD
- APPLICATION:
- INTAKE
MSRP: $17.83Now: $16.05Was: $17.83 -
On Sale
KIBBLEWHITE Intake Valve Guide 80-80770
KIBBLEWHITE
MSRP: $22.29Now: $20.06Was: $22.29Valve guide wear directly compromises compression, increases oil consumption, and degrades cylinder sealing—all of which kill power and reliability. The KIBBLEWHITE 80-80770 Intake Valve Guide uses Ampco-45, a copper-nickel alloy engineered for superior...09261687- SKU:
- 09261687
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- C630 BRONZE
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- STANDARD
- OUTSIDE DIAMETER IMPERIAL:
- 0.4352'
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- INSIDE DIAMETER IMPERIAL:
- 0.2165'
- RIDING STYLE:
- OFF-ROAD
MSRP: $22.29Now: $20.06Was: $22.29 -
On Sale
KIBBLEWHITE Exhaust Valve Guide 80-80780
KIBBLEWHITE
MSRP: $22.29Now: $20.06Was: $22.29Valve guide wear directly compromises combustion chamber seal and engine performance—this KIBBLEWHITE exhaust valve guide maintains precise bore tolerances and thermal stability under sustained high-RPM operation. Built from Ampco-45, a copper-nickel...09261688- SKU:
- 09261688
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- NICKEL
- SIZE IMPERIAL:
- STANDARD
- MATERIAL:
- AMPCO-45
- OUTSIDE DIAMETER IMPERIAL:
- 0.4352'
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER IMPERIAL:
- 0.2160'
- MATERIAL:
- BRONZE
- RIDING STYLE:
- OFF-ROAD
MSRP: $22.29Now: $20.06Was: $22.29 -
On Sale
KIBBLEWHITE Intake Valve 82-82155
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Factory intake valves wear down under sustained heat and combustion pressure, robbing your engine of efficiency and reliability. The KIBBLEWHITE Black Diamond™ Intake Valve delivers measurable gains in flow consistency, corrosion resistance, and...09261689- SKU:
- 09261689
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MODEL:
- BLACK DIAMOND™
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- UTV
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 37.72 MM
- LENGTH IMPERIAL:
- 3.775'
- STEM DIAMETER IMPERIAL:
- 0.2160'
- TULIP ANGLE:
- 17°
MSRP: $37.55Now: $33.80Was: $37.55
