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
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KIBBLEWHITE Intake Valve Guide 82-82220
KIBBLEWHITE
$26.43Valve guide wear is one of the most common causes of oil consumption and compression loss in high-performance engines. The KIBBLEWHITE Intake Valve Guide 82-82220 is engineered with Ampco-45 compound to deliver superior heat transfer and exceptional...09261174- SKU:
- 09261174
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- VALVE GUIDE
- MATERIAL:
- C630 BRONZE
- APPLICATION:
- INTAKE
- INSIDE DIAMETER IMPERIAL:
- 0.2360'
- SIZE IMPERIAL:
- STANDARD
- OUTSIDE DIAMETER IMPERIAL:
- 0.4950'
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$26.43 -
KIBBLEWHITE Intake/Exhaust Valve Guide 30-3120
KIBBLEWHITE
$34.40Valve guide wear is one of the most overlooked failure points in high-performance engines, leading to oil consumption, compression loss, and catastrophic valve seat damage if left unchecked. The KIBBLEWHITE 30-3120 intake/exhaust valve guide delivers...KW303120- SKU:
- KW303120
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.2150'
- OUTSIDE DIAMETER IMPERIAL:
- 0.4355'
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MATERIAL:
- AMPCO-45
- RIDING STYLE:
- ATV
$34.40 -
KIBBLEWHITE Valve Spring Kit 30-4021
KIBBLEWHITE
$76.99Valve spring degradation directly impacts engine efficiency, compression consistency, and overall reliability—especially under sustained high-RPM loads. The KIBBLEWHITE 30-4021 Kit delivers OEM-quality valve control with premium materials engineered to...KW304021- SKU:
- KW304021
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- SPRING LIFT:
- 0,450'
- SPRING OPEN PRESSURE:
- 202 LB
- TYPE:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT IMPERIAL:
- 0.450'
- SPRING SEAT PRESSURE:
- 66 LB
- APPLICATION:
- EXHAUST
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$76.99Qty in Cart: 0Quantity:Price:$76.99Subtotal: -
KIBBLEWHITE Valve Seat 10-SB290
KIBBLEWHITE
$30.30If you're running titanium valves in a high-performance engine, seat material matters—it directly impacts durability, heat dissipation, and longevity under extreme conditions. KIBBLEWHITE's copper-based valve seats deliver superior thermal conductivity...09261621- SKU:
- 09261621
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- INTAKE
- INSIDE DIAMETER METRIC:
- 21.00 MM
- OUTSIDE DIAMETER METRIC:
- 29.00 MM
- RIDING STYLE:
- OFF-ROAD
- VALVE SEAT HEIGHT METRIC:
- 9.50 MM
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE SEAT
- UNITS:
- EACH
$30.30 -
KIBBLEWHITE Valve Seat 10-SB320
KIBBLEWHITE
$30.30If you're running titanium valves in a high-performance engine, you need a valve seat that can handle the thermal stress and keep up with the wear demands of racing. KIBBLEWHITE's copper-based design delivers the thermal conductivity and durability that...09261623- SKU:
- 09261623
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- VALVE SEAT HEIGHT METRIC:
- 9.50 MM
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE SEAT
- OUTSIDE DIAMETER METRIC:
- 32.00 MM
- INSIDE DIAMETER METRIC:
- 24.00 MM
- UNITS:
- EACH
$30.30 -
KIBBLEWHITE Valve Seat 10-SB330
KIBBLEWHITE
$30.30If you're running titanium valves in a high-performance engine, valve seat material directly impacts reliability, thermal stability, and longevity under extreme conditions. KIBBLEWHITE's copper-based seats are engineered to handle the demands of racing...09261624- SKU:
- 09261624
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- VALVE SEAT HEIGHT METRIC:
- 9.50 MM
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE SEAT
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER METRIC:
- 24.00 MM
- OUTSIDE DIAMETER METRIC:
- 33.00 MM
- UNITS:
- EACH
$30.30 -
KIBBLEWHITE Valve Seat 10-SB340
KIBBLEWHITE
$30.30If you're running titanium valves in a high-performance engine, your valve seats need to match that precision. The KIBBLEWHITE 10-SB340 is purpose-built to handle the thermal demands and wear patterns of serious racing applications, delivering the...09261625- SKU:
- 09261625
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- OUTSIDE DIAMETER METRIC:
- 34.00 MM
- VALVE SEAT HEIGHT METRIC:
- 9.50 MM
- INSIDE DIAMETER METRIC:
- 26.00 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- VALVE SEAT
- UNITS:
- EACH
$30.30 -
KIBBLEWHITE Cast Iron Valve Seat 10-SC250
KIBBLEWHITE
$7.78Valve seat recession and microwelding are silent killers in high-performance engines—they compromise compression, reduce power output, and can lead to catastrophic valve failure. The KIBBLEWHITE Cast Iron Valve Seat 10-SC250 uses advanced powdered metal...09261629- SKU:
- 09261629
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER METRIC:
- 17.00 MM
- OUTSIDE DIAMETER METRIC:
- 25.00 MM
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 25.00 MM
- VALVE SEAT HEIGHT METRIC:
- 9.00 MM
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE SEAT
- UNITS:
- EACH
$7.78 -
KIBBLEWHITE Intake Valve Guide 30-30200
KIBBLEWHITE
$15.92Valve guide wear is one of the most common causes of compression loss, oil burning, and poor ring sealing—issues that compound quickly under high RPM and boost. The KIBBLEWHITE 30-30200 Intake Valve Guide is engineered with Ampco-45, a copper-nickel...20080200- SKU:
- 20080200
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.2155'
- MATERIAL:
- BRONZE
- APPLICATION:
- INTAKE
- MATERIAL:
- AMPCO-45
- PRODUCT NAME:
- VALVE GUIDE
- MATERIAL:
- NICKEL
- SIZE IMPERIAL:
- STANDARD
- UNITS:
- EACH
- OUTSIDE DIAMETER IMPERIAL:
- 0.4360'
- RIDING STYLE:
- OFF-ROAD
$15.92 -
KIBBLEWHITE Exhaust Valve Guide 30-30210
KIBBLEWHITE
$15.92Valve guide wear is one of the most overlooked sources of performance loss and oil consumption in high-revving engines. The KIBBLEWHITE Exhaust Valve Guide 30-30210 is engineered with Ampco-45 compound to deliver superior heat dissipation and wear...20080210- SKU:
- 20080210
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- BRONZE
- APPLICATION:
- EXHAUST
- MATERIAL:
- NICKEL
- OUTSIDE DIAMETER IMPERIAL:
- 0.4360'
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- STANDARD
- INSIDE DIAMETER IMPERIAL:
- 0.1955'
- MATERIAL:
- AMPCO-45
- UNITS:
- EACH
$15.92 -
KIBBLEWHITE Intake Valve 30-30220
KIBBLEWHITE
$31.01Intake valve performance directly impacts combustion efficiency, cylinder head sealing, and overall engine reliability—especially under high RPM conditions. The KIBBLEWHITE Black Diamond™ valve delivers superior corrosion resistance and reduced friction...20080220- SKU:
- 20080220
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 20°
- MATERIAL:
- STEEL
- HEAD DIAMETER METRIC:
- 36.00 MM
- LENGTH IMPERIAL:
- 3.315'
- MODEL:
- BLACK DIAMOND™
- STEM DIAMETER IMPERIAL:
- 0.2158'
$31.01 -
KIBBLEWHITE Cast Iron Valve Seat 10-SC380
KIBBLEWHITE
$9.44Valve seat recession and microwelding failures cost racers races and street enthusiasts reliability. The KIBBLEWHITE Cast Iron Valve Seat 10-SC380 uses advanced powdered metal technology to deliver uniform hardness and exceptional thermal stability...09261637- SKU:
- 09261637
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- HEAD DIAMETER METRIC:
- 38.50 MM
- PRODUCT NAME:
- VALVE SEAT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- OUTSIDE DIAMETER METRIC:
- 38.50 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER METRIC:
- 29.00 MM
- VALVE SEAT HEIGHT METRIC:
- 10.00 MM
$9.44 -
KIBBLEWHITE Exhaust Valve 30-30224
KIBBLEWHITE
$75.37Valve reliability directly impacts engine performance and longevity, especially in high-rpm applications where standard components fail prematurely. The KIBBLEWHITE Black Diamond™ exhaust valve is engineered to withstand extreme temperatures and...20080224- SKU:
- 20080224
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- BLACK DIAMOND™
- STEM DIAMETER IMPERIAL:
- 0.1957'
- LENGTH IMPERIAL:
- 3.320'
- PRODUCT NAME:
- VALVE
- APPLICATION:
- EXHAUST
- HEAD DIAMETER METRIC:
- 32.00 MM
- RIDING STYLE:
- OFF-ROAD
- TULIP ANGLE:
- 20°
- MATERIAL:
- STEEL
- UNITS:
- EACH
$75.37 -
KIBBLEWHITE Exhaust Valve Guide 96-96300
KIBBLEWHITE
$29.60Valve guides are critical to maintaining proper valve sealing and controlling oil consumption in high-performance engines. The KIBBLEWHITE Exhaust Valve Guide 96-96300 uses Ampco-45 material—a premium copper-nickel alloy—to deliver superior heat...09262420- SKU:
- 09262420
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- EXHAUST
- MATERIAL:
- AMPCO-45
- OUTSIDE DIAMETER IMPERIAL:
- 0.4352'
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.1955'
- MATERIAL:
- BRONZE
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- NICKEL
- SIZE IMPERIAL:
- STANDARD
$29.60 -
KIBBLEWHITE Beehive Valve Spring Kit 96-96500
KIBBLEWHITE
$181.00High-RPM performance demands valve springs engineered to handle extreme torsional stress without compromise. KIBBLEWHITE's Beehive design uses advanced ovate wire geometry and precision manufacturing to deliver the reliability and durability you need in...09263042- SKU:
- 09263042
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT IMPERIAL:
- 0.435'
- SPRING SEAT PRESSURE:
- 80 IB
- COLLAR MATERIAL:
- STEEL
- MATERIAL:
- TITANIUM
- SPRING LIFT:
- 0,435'
- APPLICATION:
- EXHAUST
- SPRING OPEN PRESSURE:
- 205 LB
- STYLE:
- OVATE WIRE BEEHIVE
- TYPE:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$181.00 -
KIBBLEWHITE Intake Valve 96-96512
KIBBLEWHITE
$54.10Intake valve performance directly impacts combustion efficiency, cylinder sealing, and overall engine reliability—especially under high-RPM conditions. Kibblewhite's Black Diamond™ valves are engineered to outlast OEM components while maintaining precise...09263043- SKU:
- 09263043
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- BLACK DIAMOND™
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 39.93 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.2358'
- UNITS:
- EACH
- TULIP ANGLE:
- 15°
- LENGTH IMPERIAL:
- 3.675'
- RIDING STYLE:
- OFF-ROAD
$54.10 -
KIBBLEWHITE Exhaust Valve 96-96516
KIBBLEWHITE
$54.10Exhaust valves endure extreme heat cycles and abrasive combustion byproducts—stock units wear prematurely and compromise engine efficiency. The KIBBLEWHITE Black Diamond™ Exhaust Valve (96-96516) extends valve life significantly through superior...09263044- SKU:
- 09263044
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD DIAMETER METRIC:
- 33.15 MM
- TULIP ANGLE:
- 30°
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- LENGTH IMPERIAL:
- 3.645'
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- BLACK DIAMOND™
- STEM DIAMETER IMPERIAL:
- 0.2353'
- UNITS:
- EACH
$54.10 -
KIBBLEWHITE Valve Guide - Exhaust 96-96520-E
KIBBLEWHITE
$22.95A worn or damaged valve guide compromises cylinder head integrity and directly impacts engine performance and longevity. KIBBLEWHITE's precision-machined exhaust valve guides restore proper valve-seat alignment and sealing, ensuring consistent combustion...09263046- SKU:
- 09263046
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- CAST IRON
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- SIZE IMPERIAL:
- STANDARD
- INSIDE DIAMETER IMPERIAL:
- 0.2353'
- OUTSIDE DIAMETER IMPERIAL:
- 0.4352'
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
$22.95 -
KIBBLEWHITE Valve Guide Seal - Viton 71029-4
KIBBLEWHITE
$13.96Valve guide seals are critical to engine longevity—they prevent oil from seeping into the combustion chamber, which causes smoking, fouling, and accelerated wear on your rings and cylinders. KIBBLEWHITE's Viton seals are engineered to withstand extreme...09263047- SKU:
- 09263047
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- SEAL
- UNITS:
- 4 PACK
- OUTSIDE DIAMETER IMPERIAL:
- 0.520'
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- STEM DIAMETER IMPERIAL:
- 0.2360'
- APPLICATION:
- INTAKE
- TYPE:
- VALVE GUIDE
$13.96 -
KIBBLEWHITE Intake Valve - Standard - Titanium - 2013-2018 96-96512T
KIBBLEWHITE
$109.33Titanium intake valves are essential for high-rpm applications where thermal stability and durability directly impact engine reliability and performance. Kibblewhite's Tensilite® valves are precision-forged from aerospace-grade titanium and finished with...09263050- SKU:
- 09263050
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- TITANIUM
- MODEL:
- TENSILITE®
- TULIP ANGLE:
- 15°
- HEAD DIAMETER METRIC:
- 39.93 MM
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- INTAKE
- STEM DIAMETER IMPERIAL:
- 0.2358'
- UNITS:
- EACH
$109.33
