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 Valve Spring Retainer DW-SZ-RX01-S
DEL WEST
$48.95Del West valve spring retainers are engineered for maximum reliability in the most demanding racing environments—from NASCAR to Formula One and professional motocross. When you're pushing your engine...09262474- SKU:
- 09262474
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE SPRING
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- RETAINER
$48.95Qty in Cart: 0Quantity:Price:$48.95Subtotal: -
DEL WEST Valve Spring Retainer DW-H-RX03-S
DEL WEST
$71.95Del West valve spring retainers are engineered for maximum reliability in extreme racing environments where factory components fail. Built with the same precision that powers Formula One and NASCAR...09262475- SKU:
- 09262475
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE SPRING
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- RETAINER
- APPLICATION:
- INTAKE
$71.95 -
DEL WEST Valve Spring Retainer DW-H-RX04-S
DEL WEST
$48.95Del West valve spring retainers are engineered for the extreme demands of professional motorsports, from NASCAR circuits to Formula One paddocks. If you're building a high-RPM engine that needs to...09262476- SKU:
- 09262476
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- EXHAUST
- TYPE:
- VALVE SPRING
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
- PRODUCT NAME:
- RETAINER
$48.95Qty in Cart: 0Quantity:Price:$48.95Subtotal: -
DEL WEST Exhaust Valve DW-CRF450R-EV02
DEL WEST
$155.95Off-road competition demands an exhaust valve that won't fail when reliability matters most. The DEL WEST DW-CRF450R-EV02 is engineered to withstand the extreme thermal and mechanical stresses of...09261046- SKU:
- 09261046
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
$155.95Qty in Cart: 0Quantity:Price:$155.95Subtotal: -
On Sale
BOLT Oil Change Hardware Kit - Yamaha OILCHG-YZF
BOLT
MSRP: $7.99Now: $7.19Was: $7.99Oil change intervals are critical maintenance windows—using worn or incorrect sealing components compromises your engine's integrity and can lead to costly leaks. The BOLT Oil Change Hardware Kit...07120521- SKU:
- 07120521
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- HARDWARE
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL CHANGE
MSRP: $7.99Now: $7.19Was: $7.99 -
FRAM Oil Filter - Honda CH6096
FRAM
$19.06Engine oil degradation is inevitable, but the consequences don't have to be. A quality oil filter removes contaminants that accumulate between changes, protecting critical engine components from wear...07120356- SKU:
- 07120356
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- YELLOW
- UNITS:
- KIT
- BASE COLOR:
- YELLOW
- FEATURES:
- COMPLETE CHANGE KIT
- FILTER MEDIA MATERIAL:
- CELLULOSE AND GLASS BLEND
- RIDING STYLE:
- ATV
- TYPE:
- CARTRIDGE
$19.06Qty in Cart: 0Quantity:Price:$19.06Subtotal: -
JAGG OIL COOLERS Oil Line Upgrade Kit - Black - 6' 211-JLWN06-6
JAGG OIL COOLERS
$89.95If you're running a JAGG oil cooler, your cooling system deserves hose lines that match its performance capability. This upgrade kit replaces stock rubber hoses with track-proven braided lines that...07110236- SKU:
- 07110236
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- BASE COLOR:
- BLACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- PRODUCT NAME:
- HOSE
- LENGTH IMPERIAL:
- 6'
- COLOR/FINISH:
- BLACK
- UNITS:
- KIT
$89.95Qty in Cart: 0Quantity:Price:$89.95Subtotal: -
JAGG OIL COOLERS Oil Line Upgrade Kit - Stainless Steel - 6' 211-JSSN06-6
JAGG OIL COOLERS
$89.95If you're running a JAGG oil cooler, your hose routing deserves the same attention to detail as your cooling system itself. This stainless steel upgrade kit replaces stock rubber lines with braided...07110237- SKU:
- 07110237
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- PRODUCT NAME:
- HOSE
- UNITS:
- KIT
- LENGTH IMPERIAL:
- 6'
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- STAINLESS STEEL
$89.95Qty in Cart: 0Quantity:Price:$89.95Subtotal: -
MOOSE RACING Oil Filter - KTM DT-09-51
MOOSE RACING
$5.95A clean oil system is fundamental to engine longevity and performance—especially in high-demand racing applications. The MOOSE RACING Oil Filter (KTM DT-09-51) delivers consistent filtration down to...07120225- SKU:
- 07120225
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- STYLE:
- SECOND FILTER FOR DUAL FILTER APPLICATIONS
- FILTER MEDIA MATERIAL:
- PAPER
- MICRON RATING:
- 10 MICRONS
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
$5.95Qty in Cart: 0Quantity:Price:$5.95Subtotal: -
PARTS UNLIMITED Oil Filter 800081675
PARTS UNLIMITED
$6.07A quality oil filter is your engine's first line of defense against contaminant buildup and premature wear. The PARTS UNLIMITED Pro Series filter combines premium materials from three continents to...07120112- SKU:
- 07120112
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BASE COLOR:
- YELLOW
- STYLE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- COLOR/FINISH:
- YELLOW
- TYPE:
- CARTRIDGE
$6.07Qty in Cart: 0Quantity:Price:$6.07Subtotal: -
PARTS UNLIMITED Oil Filter 16099-004
PARTS UNLIMITED
$7.09Engine protection starts with filtration. The PARTS UNLIMITED Pro Series Oil Filter 16099-004 uses premium international materials—German-engineered filter media, precision English adhesives, and...K150037- SKU:
- K150037
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ATV
- STYLE:
- STANDARD
- COLOR/FINISH:
- ORANGE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
- BASE COLOR:
- ORANGE
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
$7.09 -
PC RACING Oil Filter PC123
PC RACING
$49.95Engine protection starts with filtration. The PC Racing Oil Filter PC123 uses medical-grade stainless steel micronic cloth to capture contaminants down to 35 microns, ensuring consistent flow during...07120217- SKU:
- 07120217
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- BASE COLOR:
- SILVER
- FEATURES:
- REUSABLE
- BASE FINISH:
- POLISHED
- COLOR/FINISH:
- POLISHED
- MODEL:
- FLO
- PRODUCT NAME:
- OIL FILTER
- FILTER MEDIA MATERIAL:
- MICRONIC FILTER CLOTH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- STYLE:
- STANDARD
- TYPE:
- CARTRIDGE
- MATERIAL:
- STAINLESS STEEL
- MICRON RATING:
- 35 MICRONS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
Pro Filter Billet Aluminum Oil Filter Cover Honda CRF450R 2009-2016 BCA-1002-01
PRO FILTER
$55.99Your CRF450R's engine relies on consistent oil pressure and flow to maintain peak performance, and a restrictive OEM oil filter cover can become a bottleneck during aggressive riding. The PRO FILTER...07120632- SKU:
- 07120632
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- TYPE:
- OIL FILTER
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK ANODIZED
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$55.99Qty in Cart: 0Quantity:Price:$55.99Subtotal: -
Pro Filter Billet Aluminum Oil Filter Cover for 2004-2018 Kawasaki KX250F BCA-3401-00
PRO FILTER
$39.99If you're running a 2004-2018 Kawasaki KX250F, oil flow efficiency directly impacts engine longevity and peak performance under racing conditions. This Pro Filter billet aluminum cover replaces the...07120636- SKU:
- 07120636
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- COLOR/FINISH:
- BLACK ANODIZED
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- OIL FILTER
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$39.99Qty in Cart: 0Quantity:Price:$39.99Subtotal: -
On Sale
VESRAH Complete Gasket Kit - Honda 100 VG-120
VESRAH
MSRP: $49.95Now: $47.45Was: $49.95A complete engine rebuild demands precision sealing at every critical junction—missed gaskets mean catastrophic oil leaks, compression loss, and potential engine failure. The VESRAH Complete Gasket...VG120- SKU:
- VG120
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
MSRP: $49.95Now: $47.45Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $47.45Was: $49.95Subtotal: -
WINDEROSA Complete Gasket Kit - Kawasaki 1100 611405
WINDEROSA
$169.08A complete engine gasket failure can sideline your Kawasaki 1100 indefinitely, costing you race time and credibility. The WINDEROSA Complete Gasket Kit delivers OEM-quality sealing across every...PD810355- SKU:
- PD810355
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
$169.08Qty in Cart: 0Quantity:Price:$169.08Subtotal: -
On Sale
Wiseco Piston Kit 2.00mm Oversize 73.95mm Yamaha YZ250 1976-1979 234M07200
WISECO
MSRP: $232.95Now: $191.00Was: $232.95When you're pushing a classic YZ250 to its limits, a worn or damaged piston compromises compression, throttle response, and overall reliability. The Wiseco 234M07200 restores lost performance with a...234M07200- SKU:
- 234M07200
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE - OVERSIZE:
- +2,00 MM
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 71.95 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- STROKE LENGTH METRIC:
- 64.00 MM
- DISPLACEMENT:
- 246 CC
- PRODUCT NAME:
- PISTON KIT
MSRP: $232.95Now: $191.00Was: $232.95Qty in Cart: 0Quantity:Price:MSRP: $232.95Now: $191.00Was: $232.95Subtotal: -
K & N Oil Filter KN-556
K & N
$11.99If you're running synthetic or synthetic blend oils in a high-performance engine, you need a filter engineered to match that oil's flow characteristics and cleanliness demands. The K&N KN-556 uses...07120118- SKU:
- 07120118
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- LENGTH METRIC:
- 105 MM
- PRODUCT NAME:
- OIL FILTER
- COLOR/FINISH:
- RED
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- RIDING STYLE:
- SNOW
- STYLE:
- STANDARD
- TYPE:
- CARTRIDGE
- BASE COLOR:
- RED
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BASE FINISH:
- NATURAL
- RIDING STYLE:
- WATERCRAFT
$11.99 -
PINGEL Red Oil Fill Cap - CR/KX/YZ 62100
PINGEL
$33.95Stock oil fill caps are prone to cracking and leaking under the vibration and heat cycling of aggressive riding. The PINGEL Red Oil Fill Cap replaces that weak point with a precision-machined...P62100- SKU:
- P62100
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- COLOR/FINISH:
- RED
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- CAP
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- RED
- TYPE:
- OIL FILLER
$33.95 -
Pro Filter Replacement Oil Filter for 2017-2025 Kawasaki Z125 PRO PF-112
PRO FILTER
$6.99Your Z125 PRO's engine demands consistent oil flow and superior filtration to maintain peak performance, especially if you're running extended intervals or higher-quality synthetics. The PF-112...07120240- SKU:
- 07120240
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- COLOR/FINISH:
- YELLOW
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- UTV
- STYLE:
- STANDARD
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BASE COLOR:
- YELLOW
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$6.99Qty in Cart: 0Quantity:Price:$6.99Subtotal:
