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
-
KIBBLEWHITE Exhaust Valve 60-60054H
KIBBLEWHITE
$31.01Exhaust valves endure extreme heat cycles and combustion pressures that demand uncompromising material science—this is where precision engineering separates reliable engines from ones headed for failure. The Kibblewhite White Diamond™ exhaust valve...09263144- SKU:
- 09263144
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- SIZE METRIC:
- OVERSIZE
- APPLICATION:
- EXHAUST
- HEAD DIAMETER METRIC:
- 30.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 17°
- UNITS:
- EACH
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.1953'
- LENGTH IMPERIAL:
- 3.210'
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
$31.01 -
KIBBLEWHITE Intake Valve 60-60271H
KIBBLEWHITE
$31.01Precision intake valve sealing and durability separate winning builds from mediocre ones. The KIBBLEWHITE White Diamond™ valve delivers the reliability and heat resistance you need for sustained high-RPM performance, whether you're on the track or...09263145- SKU:
- 09263145
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- LENGTH IMPERIAL:
- 3.245'
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 37.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- SIZE METRIC:
- STANDARD
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1960'
$31.01 -
KIBBLEWHITE Exhaust Valve 60-60273H
KIBBLEWHITE
$31.01High-RPM combustion demands valves engineered to withstand extreme temperatures and repeated stress cycles without losing integrity. The KIBBLEWHITE White Diamond™ exhaust valve combines precision manufacturing with premium materials to deliver the...09263146- SKU:
- 09263146
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- HEAD DIAMETER METRIC:
- 29.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- SIZE METRIC:
- STANDARD
- TULIP ANGLE:
- 17°
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- STEM DIAMETER IMPERIAL:
- 0.1953'
- LENGTH IMPERIAL:
- 3.210'
- MODEL:
- WHITE DIAMOND™
$31.01 -
KIBBLEWHITE Intake Valve Kit 30-32780
KIBBLEWHITE
$185.23If you're running a high-performance engine, your valvetrain is only as strong as its weakest component. The KIBBLEWHITE Intake Valve Kit 30-32780 replaces OEM titanium parts with forged stainless steel Black Diamond valves that deliver up to 4x longer...09263147- SKU:
- 09263147
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- OFF-ROAD
- SPRING LIFT:
- 0,440'
- SPRING LIFT IMPERIAL:
- 0.440'
- SPRING OPEN PRESSURE:
- 162 LB
- SPRING SEAT PRESSURE:
- 50 LB
- TYPE:
- CONVERSION
- UNITS:
- KIT
$185.23Qty in Cart: 0Quantity:Price:$185.23Subtotal: -
KIBBLEWHITE Intake Valve Guide 30-32821
KIBBLEWHITE
$34.40Valve guide wear directly impacts cylinder head integrity, compression stability, and oil consumption—critical factors that separate a well-maintained engine from one headed for failure. The KIBBLEWHITE Intake Valve Guide 30-32821 delivers the thermal...09263148- SKU:
- 09263148
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.1960'
- MATERIAL:
- C630 BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4370'
- RIDING STYLE:
- OFF-ROAD
- SIZE IMPERIAL:
- OVERSIZE (+0.001')
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
$34.40 -
KIBBLEWHITE Intake Valve Guide 30-32822
KIBBLEWHITE
$30.95Valve guide wear directly impacts combustion seal integrity and oil consumption—choosing the right replacement is critical for engine longevity. The KIBBLEWHITE 30-32822 Intake Valve Guide uses Ampco-45, a copper-nickel alloy engineered specifically for...09263149- SKU:
- 09263149
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4380'
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- OVERSIZE (+0.002')
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.1960'
- MATERIAL:
- C630 BRONZE
$30.95 -
On Sale
KIBBLEWHITE Exhaust Valve Guide 30-32839
KIBBLEWHITE
MSRP: $30.95Now: $22.00Was: $30.95Valve guide wear is one of the most common causes of oil consumption and performance loss in high-mileage engines—and replacing them with precision-engineered components is essential for restoring compression and reliability. The KIBBLEWHITE Exhaust...09263153- SKU:
- 09263153
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER IMPERIAL:
- 0.1955'
- PRODUCT NAME:
- VALVE GUIDE
- MATERIAL:
- C630 BRONZE
- RIDING STYLE:
- OFF-ROAD
- SIZE IMPERIAL:
- OVERSIZE (+0.010')
- OUTSIDE DIAMETER IMPERIAL:
- 0.446'
- UNITS:
- EACH
MSRP: $30.95Now: $22.00Was: $30.95 -
KIBBLEWHITE Intake Valve 40-41412H
KIBBLEWHITE
$37.55Intake valve reliability directly impacts engine efficiency and longevity—especially under high RPM and forced induction conditions. KIBBLEWHITE's White Diamond™ valves are precision-engineered from premium materials and finished with hard chrome plating...09263155- SKU:
- 09263155
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- HEAD DIAMETER METRIC:
- 31.00 MM
- LENGTH IMPERIAL:
- 3.460'
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1764'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- SIZE METRIC:
- STANDARD
- TULIP ANGLE:
- 20°
- APPLICATION:
- INTAKE
- UNITS:
- EACH
$37.55 -
KIBBLEWHITE Exhaust Valve 40-41416H
KIBBLEWHITE
$37.55High-revving engines demand exhaust valves that can withstand extreme temperatures and sustained abuse without degradation. The KIBBLEWHITE White Diamond™ valve delivers the durability and precision fit that separates reliable power from catastrophic...09263156- SKU:
- 09263156
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TULIP ANGLE:
- 25°
- HEAD DIAMETER METRIC:
- 25.00 MM
- MODEL:
- WHITE DIAMOND™
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER IMPERIAL:
- 0.1759'
- LENGTH IMPERIAL:
- 3.170'
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- SIZE METRIC:
- STANDARD
$37.55 -
KIBBLEWHITE Valve Guide 96-96522
KIBBLEWHITE
$19.95Valve guide wear compromises combustion seal integrity and increases oil consumption—precision engineering is non-negotiable for reliable performance. KIBBLEWHITE's Ampco-45 construction delivers superior heat dissipation and wear resistance, maintaining...09263158- SKU:
- 09263158
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- INTAKE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4372'
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.2353'
- MATERIAL:
- C630 BRONZE
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- OVERSIZE (+0.002')
- RIDING STYLE:
- OFF-ROAD
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
KIBBLEWHITE Intake Spring Kit 30-33200
KIBBLEWHITE
$185.23Factory intake valves wear out—it's physics. The KIBBLEWHITE 30-33200 stainless steel conversion kit replaces them with components engineered to last 4x longer, keeping your valvetrain reliable through countless heat cycles and high-RPM demands. If...09263169- SKU:
- 09263169
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- ATV
- SPRING LIFT IMPERIAL:
- 0.440'
- SPRING LIFT:
- 0,440'
- SPRING OPEN PRESSURE:
- 147 LB
- SPRING SEAT PRESSURE:
- 40 LB
- TYPE:
- CONVERSION
- UNITS:
- KIT
$185.23 -
KIBBLEWHITE Intake Spring Kit 30-33250
KIBBLEWHITE
$185.23Factory titanium intake valves degrade under sustained high-RPM operation, leading to valve float, loss of compression, and costly head work. The KIBBLEWHITE Intake Spring Kit 30-33250 replaces these components with stainless steel Black Diamond valves...09263170- SKU:
- 09263170
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- SPRING LIFT IMPERIAL:
- 0.440'
- TYPE:
- CONVERSION
- SPRING LIFT:
- 0,440'
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE KIT
- SPRING OPEN PRESSURE:
- 147 LB
- SPRING SEAT PRESSURE:
- 40 LB
- UNITS:
- KIT
$185.23 -
KIBBLEWHITE Spring Kit 80-82300
KIBBLEWHITE
$220.26A quality valve spring kit is critical for maintaining proper valve seating and preventing float at high RPMs—factors that directly impact engine reliability and performance. The KIBBLEWHITE Spring Kit 80-82300 delivers OEM-grade engineering with...09263176- SKU:
- 09263176
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- SPRING OPEN PRESSURE:
- INTAKE 187 LB, EXHAUST 149 LB
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- SPRING KIT
- APPLICATION:
- EXHAUST
- SPRING LIFT IMPERIAL:
- INTAKE 0.420', EXHAUST 0.400'
- TYPE:
- VALVE
$220.26 -
KIBBLEWHITE Exhaust Valve 80-82316
KIBBLEWHITE
$31.01Exhaust valves are critical wear components that directly impact engine efficiency, throttle response, and longevity. The KIBBLEWHITE 80-82316 Black Diamond™ valve eliminates common failure points found in stock or budget alternatives through precision...09263179- SKU:
- 09263179
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- HEAD DIAMETER METRIC:
- 25.00 MM
- LENGTH IMPERIAL:
- 3.235'
- MODEL:
- BLACK DIAMOND™
- TULIP ANGLE:
- 30°
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.1760'
$31.01 -
KIBBLEWHITE Intake Valve - Standard - Titanium - YZ250F 80-82312T
KIBBLEWHITE
$92.51Titanium intake valves are essential for high-revving engines where weight reduction directly translates to faster throttle response and improved fuel efficiency. The Kibblewhite Tensilite® valve eliminates the weight penalty of traditional steel while...09263180- SKU:
- 09263180
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.1962'
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 31.00 MM
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 18°
$92.51Qty in Cart: 0Quantity:Price:$92.51Subtotal: -
KIBBLEWHITE Exhaust Valve - Standard - Titanium - YZ250F - 2019 80-82316T
KIBBLEWHITE
$92.51Factory exhaust valves are a critical wear item that directly impacts engine breathing and combustion efficiency. A premium titanium replacement like the KIBBLEWHITE Tensilite® valve restores lost performance and reliability while delivering superior...09263181- SKU:
- 09263181
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.1760'
- TULIP ANGLE:
- 30°
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- HEAD DIAMETER METRIC:
- 25.00 MM
$92.51 -
KIBBLEWHITE Intake Valve Guide 80-82320
KIBBLEWHITE
$15.92If you're rebuilding a high-mileage engine or restoring a classic, worn valve guides compromise compression, increase oil consumption, and hurt flow efficiency. The KIBBLEWHITE 80-82320 Intake Valve Guide is precision-machined from C630 material to...09263182- SKU:
- 09263182
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BASE COLOR:
- BROWN
- PRODUCT NAME:
- VALVE GUIDE
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- COLOR/FINISH:
- BRONZE
- INSIDE DIAMETER IMPERIAL:
- 0.1962'
- SIZE IMPERIAL:
- STANDARD
- MATERIAL:
- C630 BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.3957'
- RIDING STYLE:
- OFF-ROAD
$15.92 -
KIBBLEWHITE Intake Valve Guide 80-82329
KIBBLEWHITE
$15.92Valve guide wear is one of the most common causes of oil consumption, compression loss, and poor ring sealing in high-mileage engines. The KIBBLEWHITE Intake Valve Guide 80-82329 restores proper valve stem clearance with precision C630 machining,...09263185- SKU:
- 09263185
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- INTAKE
- COLOR/FINISH:
- BRONZE
- UNITS:
- EACH
- BASE COLOR:
- BROWN
- MATERIAL:
- C630 BRONZE
- PRODUCT NAME:
- VALVE GUIDE
- INSIDE DIAMETER IMPERIAL:
- 0.1962'
- OUTSIDE DIAMETER IMPERIAL:
- 0.4057'
- RIDING STYLE:
- OFF-ROAD
- SIZE IMPERIAL:
- OVERSIZE (+0.010')
$15.92 -
KIBBLEWHITE Exhaust Valve Guide 80-82330
KIBBLEWHITE
$15.92Factory valve guides wear out, causing excess clearance that tanks flow efficiency and invites valve recession—especially in high-mileage or boosted applications. KIBBLEWHITE's C630 precision-machined guides restore OEM geometry with tighter tolerances...09263186- SKU:
- 09263186
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- COLOR/FINISH:
- BRONZE
- INSIDE DIAMETER IMPERIAL:
- 0.1760'
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BASE COLOR:
- BROWN
- MATERIAL:
- C630 BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.3563'
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- STANDARD
- APPLICATION:
- EXHAUST
$15.92 -
KIBBLEWHITE Exhaust Valve Guide 80-82339
KIBBLEWHITE
$15.92If you're building or rebuilding a high-performance engine, valve guide quality directly impacts cylinder head durability and flow efficiency. The KIBBLEWHITE 80-82339 is precision-machined from C630 material to handle sustained high RPM operation while...09263189- SKU:
- 09263189
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- SIZE IMPERIAL:
- OVERSIZE (+0.010')
- INSIDE DIAMETER IMPERIAL:
- 0.1760'
- OUTSIDE DIAMETER IMPERIAL:
- 0.3663'
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BRONZE
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
- BASE COLOR:
- BROWN
- MATERIAL:
- C630 BRONZE
$15.92
