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!
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- Price
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KIBBLEWHITE Intake Valve Guide 82-82220
KIBBLEWHITE
$26.43All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.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
$34.40All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.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
$76.99Black Diamond™ valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond® valves feature one-piece construction and hard chrome stems, Spring sets...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
$76.99 -
KIBBLEWHITE Valve Seat 10-SB290
KIBBLEWHITE
$30.30Copper-based material designed specifically for use with titanium valves in high performance applications, Give the seat excellent thermal characteristics as well as resistance to corrosion and wear, These seats are the result of a two year KPMI R&D...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
$30.30Copper-based material designed specifically for use with titanium valves in high performance applications, Give the seat excellent thermal characteristics as well as resistance to corrosion and wear, These seats are the result of a two year KPMI R&D...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
$30.30Copper-based material designed specifically for use with titanium valves in high performance applications, Give the seat excellent thermal characteristics as well as resistance to corrosion and wear, These seats are the result of a two year KPMI R&D...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
$30.30Copper-based material designed specifically for use with titanium valves in high performance applications, Give the seat excellent thermal characteristics as well as resistance to corrosion and wear, These seats are the result of a two year KPMI R&D...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
$7.78Premium valve seats for applications using steel valves, A specific combination of alloys allowed a creation of a high density, iron-based valve seat with uniform hardness, exceptional thermal qualities and high resistance to wear and recession caused by...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
$15.92All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.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
$15.92All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.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
$31.01Black Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamond™ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the U.S.A.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
$9.44Premium valve seats for applications using steel valves, A specific combination of alloys allowed a creation of a high density, iron-based valve seat with uniform hardness, exceptional thermal qualities and high resistance to wear and recession caused by...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
$75.37Black Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamond™ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the U.S.A.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
$29.60All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.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
$181.00By taking advantage of the latest development in valve spring wire chemistry and manufacturing techniques, By coupling these developments with strict KPMI® design protocols and employing multiple design simulation and FEA analysis software, we were we...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
$54.10Black Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamond™ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the U.S.A.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
$54.10Black Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamond™ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the U.S.A.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
$22.95Precision-machined from cast iron, Compatible with no-lead fuel and accept any type of valve-stem material, Made in the U.S.A.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
$13.96Viton intake/exhaust seals, Made in the U.S.A.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
$109.33Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy, Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant, Made in the U.S.A.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
