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
-
DEL WEST Intake Valve DW-RMZ250-IV10
DEL WEST
$155.95If you're pushing your RMZ250 to its limits in competition, valve reliability becomes non-negotiable. The DEL WEST Intake Valve is engineered to withstand the extreme heat cycles and aggressive operation that separates winners from the rest, with a...09262254- SKU:
- 09262254
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- INTAKE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- VALVE
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
$155.95 -
DEL WEST Intake Valve DWLTR450IV11HFP
DEL WEST
$155.95If you're running a high-performance off-road engine, valve reliability under extreme conditions isn't negotiable. The DEL WEST Intake Valve DWLTR450IV11HFP is purpose-built for sustained competition use, backed by a proven track record that separates...09262255- SKU:
- 09262255
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$155.95 -
DEL WEST Intake Valve DW-LTR4501IV11
DEL WEST
$155.95Off-road racing demands valve components that won't compromise under extreme conditions—DEL WEST's proven track record speaks for itself. This intake valve is engineered to handle the punishment of competition environments while maintaining the...09261725- SKU:
- 09261725
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
$155.95 -
DEL WEST Intake Valve DW-LTR450-IV11
DEL WEST
$155.95If you're running hard in off-road competition, your intake valve is your engine's first line of defense against the extreme demands of aggressive riding. DEL WEST has built an unmatched reputation for reliability in the field—these valves are engineered...09261726- SKU:
- 09261726
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$155.95 -
DEL WEST Exhaust Valve DW-LTR4501EV11
DEL WEST
$155.95Off-road racing demands exhaust valves engineered to withstand extreme temperatures, pressure spikes, and continuous high-RPM operation. DEL WEST's LTR4501EV11 delivers competition-proven reliability with a track record that speaks for itself in the most...09261727- SKU:
- 09261727
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- ATV
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
$155.95 -
DEL WEST Exhaust Valve DW-LTR450EV11
DEL WEST
$155.95Off-road racing demands exhaust components that can withstand extreme temperatures, pressure spikes, and constant vibration without failure. The DEL WEST Exhaust Valve DW-LTR450EV11 is engineered for that punishment—proven in competition environments...09261728- SKU:
- 09261728
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- VALVE
- MATERIAL:
- TITANIUM
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$155.95 -
DEL WEST Intake Valve DW-KFX450R-IV11
DEL WEST
$155.95If you're running a Kawasaki KFX450R in competition or high-stress trail conditions, valve reliability directly impacts your engine's ability to maintain peak performance under sustained load. DEL WEST intake valves are engineered to withstand the...09261731- SKU:
- 09261731
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE
$155.95 -
DEL WEST Intake Valve DWYFZ450R11IV03
DEL WEST
$155.95Off-road racing demands valve components that can withstand extreme combustion pressures, thermal cycling, and prolonged high-RPM operation. The DEL WEST Intake Valve DWYFZ450R11IV03 delivers the precision engineering and material science required to...09261732- SKU:
- 09261732
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- ATV
$155.95 -
DEL WEST Intake Valve DWYFZ450R21IV03
DEL WEST
$155.95Off-road competition demands intake valves that won't compromise reliability under extreme conditions. DEL WEST's proven track record in competitive environments ensures your engine delivers consistent performance without valve-related failures. Built to...09261733- SKU:
- 09261733
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
$155.95 -
DEL WEST Intake Valve DWYFZ450R22IV03
DEL WEST
$155.95If you're running a Yamaha YFZ450R in competition or high-demand off-road conditions, valve reliability directly impacts your engine's longevity and peak performance. DEL West intake valves are engineered to withstand extreme temperatures and combustion...09261734- SKU:
- 09261734
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
$155.95Qty in Cart: 0Quantity:Price:$155.95Subtotal: -
DEL WEST Exhaust Valve DW-YFZ450R1EV03
DEL WEST
$155.95If you're running a YFZ450R in competition or demanding trail conditions, valve reliability directly impacts your engine's performance and longevity. DEL West exhaust valves are built to withstand the thermal and mechanical stress of high-RPM off-road...09261735- SKU:
- 09261735
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- VALVE
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
$155.95 -
DEL WEST Exhaust Valve DW-YFZ450R2EV03
DEL WEST
$155.95If you're pushing your YFZ450R2 to its limits in competition, your exhaust valve needs to match your commitment to performance. DEL WEST valves are purpose-built for the demands of off-road racing, delivering the reliability that separates winners from...09261736- SKU:
- 09261736
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
$155.95 -
ACERBIS X-Power Cover Kit - Black - KTM/Husqvarna 2726840001
ACERBIS
$69.95Protect your engine investment from the rigors of off-road riding with the ACERBIS X-Power Cover Kit. Dirt, debris, and impacts pose constant threats to exposed crankcase and clutch covers—this kit shields critical engine components without sacrificing...09401766- SKU:
- 09401766
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- X-POWER
- UNITS:
- KIT
- MATERIAL:
- PLASTIC
- PRODUCT NAME:
- COVER
- TYPE:
- ENGINE
$69.95 -
BOLT Oil Change Hardware Kit - Honda OILCHG-CRF
BOLT
$7.99Proper sealing is critical to maintaining oil system integrity and preventing leaks that compromise engine performance and cleanliness. This kit supplies all the OEM-specification seals and washers needed for a complete oil change, ensuring your Honda...07120520- SKU:
- 07120520
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- OIL CHANGE
- PRODUCT NAME:
- HARDWARE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$7.99 -
BOLT Oil Change Hardware Kit - Kawasaki OILCHG-KXF2
BOLT
$7.99Maintaining proper oil system sealing is critical to engine longevity and performance. This hardware kit supplies all the OEM-specification O-rings and washers needed to restore your oil change components to factory condition, preventing leaks that...07120522- SKU:
- 07120522
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- HARDWARE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL CHANGE
- UNITS:
- KIT
$7.99 -
BOLT Oil Change Hardware Kit - Kawasaki OILCHG-KXF4.16+
BOLT
$7.99Oil change maintenance demands precision—worn seals and degraded washers compromise your engine's integrity and create costly leaks. The BOLT Oil Change Hardware Kit supplies OEM-specification replacement components for your Kawasaki KXF, ensuring a...07120524- SKU:
- 07120524
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- OIL CHANGE
- PRODUCT NAME:
- HARDWARE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$7.99 -
K & N Oil Filter KN-563
K & N
$11.99If you're running synthetic or synthetic blend oils in a high-performance engine, your stock oil filter won't cut it. The K&N KN-563 is engineered specifically for the elevated flow rates and demanding conditions of racing applications, delivering...07120353- SKU:
- 07120353
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- BASE COLOR:
- RED
- BASE FINISH:
- NATURAL
- STYLE:
- STANDARD
- LENGTH METRIC:
- 47 MM
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- RED
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
$11.99 -
K & N Oil Filter KN-564
K & N
$15.99Synthetic racing oils demand precision filtration that standard filters simply can't deliver. The K&N KN-564 is engineered specifically for high-performance applications, featuring synthetic media that maintains superior flow rates while trapping...07120354- SKU:
- 07120354
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- BASE COLOR:
- RED
- BASE FINISH:
- NATURAL
- STYLE:
- STANDARD
- LENGTH METRIC:
- 97 MM
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- RED
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
$15.99 -
K & N Oil Filter KN-140
K & N
$11.99If you're running synthetic or synthetic-blend oil in a high-performance engine, you need a filter designed to handle it—and the K&N KN-140 is built specifically for that job. Standard oil filters can't keep up with the flow rates of modern synthetics,...07120355- SKU:
- 07120355
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- COLOR/FINISH:
- RED
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- BASE COLOR:
- RED
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- LENGTH METRIC:
- 46 MM
- PRODUCT NAME:
- OIL FILTER
- BASE FINISH:
- NATURAL
- STYLE:
- STANDARD
$11.99 -
K & N Oil Filter KN-652
K & N
$11.99Synthetic racing oils demand a filter built to handle their unique demands—and the K&N KN-652 is engineered specifically for that job. Its high-flow synthetic media keeps pace with modern performance engines while delivering superior filtration, ensuring...07120148- SKU:
- 07120148
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- BASE COLOR:
- RED
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- RED
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- LENGTH METRIC:
- 87 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
$11.99
