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
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- Quantity
- Price
- Subtotal
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On Sale
KURYAKYN Inner Primary Cover Extensions 8370
KURYAKYN
MSRP: $54.99Now: $50.39Was: $55.99KURYAKYN Inner Primary Cover Extensions 8370Puts the finishing touch on your primary, Covers the shift pivot area and grease fitting, Easily installed9500198- SKU:
- 9500198
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- COVER EXTENSION
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- FRONT
MSRP: $54.99Now: $50.39Was: $55.99Qty in Cart: 0Quantity:Price:MSRP: $54.99Now: $50.39Was: $55.99Subtotal: -
On Sale
KURYAKYN Cylinder/Base Cover - Precision - Chrome 6452
KURYAKYN
MSRP: $81.99Now: $73.79Was: $81.99KURYAKYN Cylinder/Base Cover Precision Chrome 6452Durable die-cast aluminum construction offered in chrome or gloss black finishes, Easy bolt-on installation, A must-have addition to the Precision Inner Primary Covers9401749- SKU:
- 9401749
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
MSRP: $81.99Now: $73.79Was: $81.99Qty in Cart: 0Quantity:Price:MSRP: $81.99Now: $73.79Was: $81.99Subtotal: -
On Sale
KURYAKYN Cylinder/Base Cover - Precision - Black 6453
KURYAKYN
MSRP: $81.99Now: $73.79Was: $81.99KURYAKYN Cylinder/Base Cover Precision Black 6453Durable die-cast aluminum construction offered in chrome or gloss black finishes, Easy bolt-on installation, A must-have addition to the Precision Inner Primary Covers9401750- SKU:
- 9401750
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- DIE-CAST
- STYLE:
- -
- TYPE:
- CYLINDER BASE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- GLOSS
- MODEL:
- PRECISION®
MSRP: $81.99Now: $73.79Was: $81.99Qty in Cart: 0Quantity:Price:MSRP: $81.99Now: $73.79Was: $81.99Subtotal: -
On Sale
KURYAKYN Lower Front Engine Cover - Precision - Chrome 6454
KURYAKYN
MSRP: $81.99Now: $73.79Was: $81.99KURYAKYN Lower Front Engine Cover Precision Chrome 6454Durable die-cast aluminum construction offered in chrome or gloss black finishes, Easy bolt-on installation, A must-have addition to the Precision Inner Primary Covers9401751- SKU:
- 9401751
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- LOWER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- TYPE:
- FRAME
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- COVER
- MODEL:
- PRECISION®
- RIDING STYLE:
- STREET
MSRP: $81.99Now: $73.79Was: $81.99Qty in Cart: 0Quantity:Price:MSRP: $81.99Now: $73.79Was: $81.99Subtotal: -
On Sale
KURYAKYN Precision?« Tappet Cover - Black 6440
KURYAKYN
MSRP: $97.99Now: $88.19Was: $97.99KURYAKYN Precision?« Tappet Cover Black 6440Easy installation reusing factory bolts, Durable die-cast aluminum construction, Styled for a coordinated look with the entire Precision line of engine covers9401693- SKU:
- 9401693
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- COLOR/FINISH:
- GLOSS
- MODEL:
- PRECISION®
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- TYPE:
- TAPPET
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $97.99Now: $88.19Was: $97.99Qty in Cart: 0Quantity:Price:MSRP: $97.99Now: $88.19Was: $97.99Subtotal: -
On Sale
KURYAKYN Precision?« Cylinder Base Cover - Black 6441
KURYAKYN
MSRP: $81.99Now: $73.79Was: $81.99KURYAKYN Precision?« Cylinder Base Cover Black 6441Durable die-cast aluminum construction, Easy bolt-on installation, A must-have addition to the Precision Inner Primary Covers9401694- SKU:
- 9401694
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
MSRP: $81.99Now: $73.79Was: $81.99Qty in Cart: 0Quantity:Price:MSRP: $81.99Now: $73.79Was: $81.99Subtotal: -
On Sale
KURYAKYN Tappet Accent Block - Indian 5641
KURYAKYN
MSRP: $93.99Now: $86.39Was: $93.99KURYAKYN Tappet Accent Block Indian 5641Finish off the OEM chrome look with this tappet block accent, Create a unique transition from the cylinder head to the motor block, Simple installation9401359- SKU:
- 9401359
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- PRODUCT NAME:
- ACCENT
- TYPE:
- TAPPET BLOCK
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
MSRP: $93.99Now: $86.39Was: $93.99Qty in Cart: 0Quantity:Price:MSRP: $93.99Now: $86.39Was: $93.99Subtotal: -
On Sale
KURYAKYN Cylinder Base Cover 8392
KURYAKYN
MSRP: $87.99Now: $80.99Was: $89.99KURYAKYN Cylinder Base Cover 8392High-quality, chrome-plated, die-cast construction, Smooths the transition from the cylinders to the engine cases, Easy installation9400739- SKU:
- 9400739
- Availability:
- Ships Same Business Day
- Weight:
- 1.21 LBS
- MODEL:
- -
- TYPE:
- CYLINDER BASE
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
- MATERIAL:
- DIE-CAST
MSRP: $87.99Now: $80.99Was: $89.99Qty in Cart: 0Quantity:Price:MSRP: $87.99Now: $80.99Was: $89.99Subtotal: -
On Sale
KURYAKYN Cylinder Base Cover 8393
KURYAKYN
MSRP: $83.99Now: $77.39Was: $85.99KURYAKYN Cylinder Base Cover 8393High-quality, chrome-plated, die-cast construction, Smooths the transition from the cylinders to the engine cases, Easy installation9400740- SKU:
- 9400740
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
- MODEL:
- -
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- MATERIAL:
- DIE-CAST
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- TYPE:
- CYLINDER BASE
- UNITS:
- EACH
MSRP: $83.99Now: $77.39Was: $85.99Qty in Cart: 0Quantity:Price:MSRP: $83.99Now: $77.39Was: $85.99Subtotal: -
On Sale
KURYAKYN Easy-Turn Dipstick Cover 1007
KURYAKYN
MSRP: $35.99Now: $33.29Was: $36.99KURYAKYN Easy-Turn Dipstick Cover 1007Cap uses the stock internals of the OEM dipstick, Cap design makes it easy to turn the cap for checking oil levels10150120- SKU:
- 10150120
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OIL DIPSTICK
- UNITS:
- EACH
MSRP: $35.99Now: $33.29Was: $36.99Qty in Cart: 0Quantity:Price:MSRP: $35.99Now: $33.29Was: $36.99Subtotal: -
On Sale
KURYAKYN Solenoid End Cover 9050
KURYAKYN
MSRP: $27.99Now: $26.99Was: $29.99KURYAKYN Solenoid End Cover 9050Replaces stock OEM cover, Comes complete with chrome hardware; reuses stock gasketDS376596- SKU:
- DS376596
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- COVER
- TYPE:
- SOLENOID
MSRP: $27.99Now: $26.99Was: $29.99Qty in Cart: 0Quantity:Price:MSRP: $27.99Now: $26.99Was: $29.99Subtotal: -
On Sale
KURYAKYN Cylinder Base Rear Cover 8274
KURYAKYN
MSRP: $49.99Now: $45.89Was: $50.99KURYAKYN Cylinder Base Rear Cover 8274Covers the area between the transmission top cover and rear cylinder, Installs quickly and easily, Beautiful chrome finish9400591- SKU:
- 9400591
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MOUNTING POSITION:
- REAR
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
- TYPE:
- CYLINDER BASE
- BASE FINISH:
- CHROME
MSRP: $49.99Now: $45.89Was: $50.99Qty in Cart: 0Quantity:Price:MSRP: $49.99Now: $45.89Was: $50.99Subtotal: -
KIBBLEWHITE Valve Seal 71006-4
KIBBLEWHITE
$13.95KIBBLEWHITE Valve Seal 71006-4For use with intake and exhaust valve guides, Retain their ability to seal in adverse conditions, PTFE seals feature a metal jacket with choker spring, Made in the U.S.A.9260794- SKU:
- 9260794
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- MATERIAL:
- PTFE
- TYPE:
- VALVE
- UNITS:
- 4 PACK
- APPLICATION:
- INTAKE
$13.95 -
KIBBLEWHITE Valve Seals 71007-4
KIBBLEWHITE
$13.95KIBBLEWHITE Valve Seals 71007-4For use with intake and exhaust valve guides, Retain their ability to seal in adverse conditions, PTFE seals feature a metal jacket with choker spring, Made in the U.S.A.9260795- SKU:
- 9260795
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- STREET
- MATERIAL:
- PTFE
- PRODUCT NAME:
- SEAL
- TYPE:
- VALVE
- UNITS:
- 4 PACK
$13.95 -
KB PERFORMANCE Piston Kit - FX/FL KB263.STD
KB PERFORMANCE
$249.95KB PERFORMANCE Piston Kit FX/FL KB263.STDManufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751201- SKU:
- DS751201
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.437'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
$249.95 -
KB PERFORMANCE Piston Kit - FX/FL KB263.010
KB PERFORMANCE
$249.95KB PERFORMANCE Piston Kit FX/FL KB263.010Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751203- SKU:
- DS751203
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.437'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
$249.95 -
KB PERFORMANCE Piston Kit - FX/FL KB263.020
KB PERFORMANCE
$249.95KB PERFORMANCE Piston Kit FX/FL KB263.020Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751204- SKU:
- DS751204
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- BORE SIZE IMPERIAL:
- 3.437'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$249.95 -
KB PERFORMANCE Piston Kit - FX/FL KB263.030
KB PERFORMANCE
$249.95KB PERFORMANCE Piston Kit FX/FL KB263.030Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751205- SKU:
- DS751205
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.437'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- UNITS:
- KIT
$249.95 -
KB PERFORMANCE Piston Kit - FX/FL KB263.040
KB PERFORMANCE
$249.95KB PERFORMANCE Piston Kit FX/FL KB263.040Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751206- SKU:
- DS751206
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.040'
- BORE SIZE IMPERIAL:
- 3.437'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
$249.95 -
KB PERFORMANCE Piston Kit - FX/FL KB263.050
KB PERFORMANCE
$249.95KB PERFORMANCE Piston Kit FX/FL KB263.050Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751207- SKU:
- DS751207
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- UNITS:
- KIT
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.437'
- BORE OVERSIZE - IMPERIAL:
- +0.050'
$249.95
