Dirt Bike Engine
Explore our selection for dirt bike parts for adding horsepower or reliability to a dirt bike's engine. We feature engine parts from Wiseco, Vertex, and more common engine part manufacturers. Get new pistons and gasket kits for re-freshening engines to withstand any conditions you put your bike through!
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Dirt Bike Cams and Parts
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Dirt Bike Connecting Rods and Parts
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Dirt Bike Crankcases and Parts
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Dirt Bike Crankshafts and Parts
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Dirt Bike Cylinder Heads and Parts
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Dirt Bike Cylinders and Parts
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Dirt Bike Engine Bearings
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Dirt Bike Engine Covers
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Dirt Bike Engine Gaskets and Kits
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Dirt Bike Engine Rebuild Kits
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Dirt Bike Engine Seals - Orings and Kits
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Dirt Bike Engine Valves and Parts
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Dirt Bike Flywheel and Rod Assemblies
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Dirt Bike Fuel Filters
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Dirt Bike Miscellaneous Engine Parts
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Dirt Bike Oil Coolers
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Dirt Bike Oil Filters
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Dirt Bike Oil Lines
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Dirt Bike Oil Pumps
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Dirt Bike Piston and Ring Kits
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Dirt Bike Piston Rings Only
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Dirt Bike Wrist Pins and Circlips
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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KIBBLEWHITE Valve Guide - Big Twin 20-2023C
KIBBLEWHITE
$9.95KIBBLEWHITE Valve Guide Big Twin 20-2023CPrecision-machined from cast iron, Compatible with no-lead fuel and accept any type of valve-stem material, Made in the U.S.A.9260750- SKU:
- 9260750
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- APPLICATION:
- INTAKE
- OUTSIDE DIAMETER IMPERIAL:
- 0.5680'
- SIZE IMPERIAL:
- OVERSIZE (+0.003')
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- RIDING STYLE:
- STREET
- MATERIAL:
- CAST IRON
- PRODUCT NAME:
- VALVE GUIDE
$9.95 -
KIBBLEWHITE Valve Guide - Big Twin 20-2033C
KIBBLEWHITE
$9.95KIBBLEWHITE Valve Guide Big Twin 20-2033CPrecision-machined from cast iron, Compatible with no-lead fuel and accept any type of valve-stem material, Made in the U.S.A.9260751- SKU:
- 9260751
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- OUTSIDE DIAMETER IMPERIAL:
- 0.5680'
- SIZE IMPERIAL:
- OVERSIZE (+0.003')
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- STREET
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- MATERIAL:
- CAST IRON
- PRODUCT NAME:
- VALVE GUIDE
$9.95 -
KIBBLEWHITE Valve Guide - Big Twin 20-2024C
KIBBLEWHITE
$9.95KIBBLEWHITE Valve Guide Big Twin 20-2024CPrecision-machined from cast iron, Compatible with no-lead fuel and accept any type of valve-stem material, Made in the U.S.A.9260752- SKU:
- 9260752
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- SIZE IMPERIAL:
- OVERSIZE (+0.004')
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- MATERIAL:
- CAST IRON
- OUTSIDE DIAMETER IMPERIAL:
- 0.5690'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
$9.95 -
KIBBLEWHITE Valve Guide - Big Twin 20-2034C
KIBBLEWHITE
$9.95KIBBLEWHITE Valve Guide Big Twin 20-2034CPrecision-machined from cast iron, Compatible with no-lead fuel and accept any type of valve-stem material, Made in the U.S.A.9260753- SKU:
- 9260753
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- OVERSIZE (+0.004')
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MATERIAL:
- CAST IRON
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- OUTSIDE DIAMETER IMPERIAL:
- 0.5690'
- RIDING STYLE:
- STREET
$9.95 -
KIBBLEWHITE Valve Guide - Big Twin 20-2020C
KIBBLEWHITE
$9.95KIBBLEWHITE Valve Guide Big Twin 20-2020CPrecision-machined from cast iron, Compatible with no-lead fuel and accept any type of valve-stem material, Made in the U.S.A.9260754- SKU:
- 9260754
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- RIDING STYLE:
- STREET
- SIZE IMPERIAL:
- STANDARD
- APPLICATION:
- INTAKE
- OUTSIDE DIAMETER IMPERIAL:
- 0.5650'
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
- MATERIAL:
- CAST IRON
$9.95 -
KIBBLEWHITE Cast Iron Valve Guide 20-2051C
KIBBLEWHITE
$9.95KIBBLEWHITE Cast Iron Valve Guide 20-2051CPrecision-machined from cast iron, Compatible with no-lead fuel and accept any type of valve-stem material, Accept special valve guide seals (sold separately), Made in the U.S.A.9260755- SKU:
- 9260755
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.3745'
- OUTSIDE DIAMETER IMPERIAL:
- 0.6260'
- RIDING STYLE:
- STREET
- MATERIAL:
- CAST IRON
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
$9.95 -
KIBBLEWHITE Cast Iron Valve Guide 20-2061C
KIBBLEWHITE
$9.95KIBBLEWHITE Cast Iron Valve Guide 20-2061CPrecision-machined from cast iron, Compatible with no-lead fuel and accept any type of valve-stem material, Accept special valve guide seals (sold separately), Made in the U.S.A.9260756- SKU:
- 9260756
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER IMPERIAL:
- 0.6260'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.3745'
- MATERIAL:
- CAST IRON
- PRODUCT NAME:
- VALVE GUIDE
$9.95 -
KIBBLEWHITE Cast Iron Valve Guide 20-2052C
KIBBLEWHITE
$9.95KIBBLEWHITE Cast Iron Valve Guide 20-2052CPrecision-machined from cast iron, Compatible with no-lead fuel and accept any type of valve-stem material, Accept special valve guide seals (sold separately), Made in the U.S.A.9260757- SKU:
- 9260757
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- APPLICATION:
- INTAKE
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.3745'
- OUTSIDE DIAMETER IMPERIAL:
- 0.6270'
- RIDING STYLE:
- STREET
- MATERIAL:
- CAST IRON
- PRODUCT NAME:
- VALVE GUIDE
$9.95 -
KIBBLEWHITE Intake Valve Guide 30-30730
KIBBLEWHITE
$15.95KIBBLEWHITE Intake Valve Guide 30-30730All 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, Keepers are not included, Made in the U.S.A.9300019- SKU:
- 9300019
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- AMPCO-45
- INSIDE DIAMETER IMPERIAL:
- 0.2155'
- OUTSIDE DIAMETER IMPERIAL:
- 0.4360'
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$15.95 -
KIBBLEWHITE Exhaust Valve Guide 30-30740
KIBBLEWHITE
$15.95KIBBLEWHITE Exhaust Valve Guide 30-30740All 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, Keepers are not included, Made in the U.S.A.9300021- SKU:
- 9300021
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.2150'
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER IMPERIAL:
- 0.4360'
- MATERIAL:
- AMPCO-45
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$15.95 -
KIBBLEWHITE Exhaust Spigot - Big Twin 20-2104
KIBBLEWHITE
$11.95KIBBLEWHITE Exhaust Spigot Big Twin 20-2104Designed and machined from 6061 T-6 aluminum extruded tubing, Allows you to rebuild the exhaust attachment point on your classic Panhead engine, Welding required, Made in the U.S.A.9300059- SKU:
- 9300059
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- COLOR/FINISH:
- ALUMINUM
- MATERIAL:
- 6061 T6 ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- EXHAUST SPIGOT
- UNITS:
- EACH
$11.95 -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB661C.STD
KB PERFORMANCE
$335.95KB PERFORMANCE Forged Piston Kit Twin Cam KB661C.STDPistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available...9103973- SKU:
- 9103973
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE SIZE IMPERIAL:
- 4.000'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- UNITS:
- KIT
$335.95 -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB661C.010
KB PERFORMANCE
$335.95KB PERFORMANCE Forged Piston Kit Twin Cam KB661C.010Pistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available...9103975- SKU:
- 9103975
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE - OVERSIZE:
- +0,010'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 4.010'
- RIDING STYLE:
- STREET
$335.95 -
K&S TECHNOLOGIES Gasket Kit - YZ/WR450F 75-4006
K&S TECHNOLOGIES
$37.95K&S TECHNOLOGIES Gasket Kit YZ/WR450F 75-4006Each kit includes all necessary gaskets, washers, seals and O-rings; kit contents vary by model9344066- SKU:
- 9344066
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$37.95Qty in Cart: 0Quantity:Price:$37.95Subtotal: -
K&S TECHNOLOGIES Water Pump Repair Gasket Kit - YZ450F 75-4002
K&S TECHNOLOGIES
$35.95K&S TECHNOLOGIES Water Pump Repair Gasket Kit YZ450F 75-4002Each kit includes all necessary gaskets, washers, seals and O-rings; kit contents vary by model9341922- SKU:
- 9341922
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$35.95Qty in Cart: 0Quantity:Price:$35.95Subtotal: -
K&S TECHNOLOGIES Water Pump Repair Gasket Kit - YZF450 75-4003
K&S TECHNOLOGIES
$37.95K&S TECHNOLOGIES Water Pump Repair Gasket Kit YZF450 75-4003Each kit includes all necessary gaskets, washers, seals and O-rings; kit contents vary by model9341923- SKU:
- 9341923
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$37.95 -
On Sale
HOTOP Breather Gear Air Ramp PBGR-20
HOTOP
MSRP: $44.95Now: $29.22Was: $44.95HOTOP Breather Gear Air Ramp PBGR-20Increases cfm flow by approximately 80%, Helps remove more air and oil from the crankcase, Made in the U.S.A., Requires the removal of the screen on S&S breather gears.DS194254- SKU:
- DS194254
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- AIR RAMP
- TYPE:
- BREATHER GEAR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $44.95Now: $29.22Was: $44.95 -
JAMES GASKET Exhaust Port Stainless Steel Gasket Kit - Big Twin/XL/EVO 65324-83-KW2
JAMES GASKET
$24.95JAMES GASKET Exhaust Port Stainless Steel Gasket Kit Big Twin/XL/EVO 65324-83-KW2Kits include gaskets and heavy-duty flange hex nuts or chrome acorn nuts with washers, Made in the U.S.A. by James Gaskets18610459- SKU:
- 18610459
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- EXHAUST PORT
- UNITS:
- KIT
- FEATURES:
- KNITTED WIRE GASKETS
- MATERIAL:
- STAINLESS STEEL
- FEATURES:
- FLANGE HEX NUTS
- RIDING STYLE:
- STREET
$24.95 -
JAMES GASKET Exhaust Port Graphite Gasket Kit - Big Twin/XL/EVO 65324-83-KWG2
JAMES GASKET
$24.95JAMES GASKET Exhaust Port Graphite Gasket Kit Big Twin/XL/EVO 65324-83-KWG2Kits include gaskets and heavy-duty flange hex nuts or chrome acorn nuts with washers, Made in the U.S.A. by James Gaskets18610460- SKU:
- 18610460
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- FEATURES:
- GRAPHITE/KNITTED WIRE GASKETS
- RIDING STYLE:
- STREET
- FEATURES:
- FLANGE HEX NUTS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- MATERIAL:
- GRAPHITE
- TYPE:
- EXHAUST PORT
$24.95 -
JAMES GASKET Exhaust Port Graphite Gasket Kit - Big Twin/XL/EVO 65324-83-KCR2
JAMES GASKET
$24.95JAMES GASKET Exhaust Port Graphite Gasket Kit Big Twin/XL/EVO 65324-83-KCR2Kits include gaskets and heavy-duty flange hex nuts or chrome acorn nuts with washers, Made in the U.S.A. by James Gaskets18610461- SKU:
- 18610461
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- TYPE:
- EXHAUST PORT
- UNITS:
- KIT
- FEATURES:
- FLANGE HEX NUTS
- RIDING STYLE:
- STREET
$24.95
