Dirt Bike Air and Fuel
Dirt Bike Air & Fuel Systems at JJ Motorsports
Optimize your bike’s performance with high-quality air and fuel components from JJ Motorsports. Browse air filters, carburetors, and fuel system parts engineered to deliver clean airflow and a consistent fuel mix for peak efficiency. Ensure your bike runs smoothly by pairing these with other essential off-road dirt bike accessories.
Shop trusted brands like Motion Pro for cables and Uni Filter for high-flow filters. Explore related categories such as Dirt Bike Engine Parts for rebuilds or Dirt Bike Exhaust for complete tuning.
Top Dirt Bike Air & Fuel Products
- MOTION PRO Clutch Cable - Honda - Black Vinyl 02-0603 – Nylon-lined for smooth operation and OEM fit.
- UNI FILTER Filter - GS550/650 Miscellaneous NU-2439 – High-flow foam for better air intake and easy cleaning.
- MIKUNI Main Jet - 4-Pack N100604-1025 – Precision jets for VM16, HS40, HSR42/45/48 carbs.
- DYNOJET Power Vision 3 - Yamaha PV3-22-16 – Flash tunes with real-time data display for Yamaha models.
- UNI FILTER Filter - GS650G/GL/M NU-2440 – Precision fit with indefinite service life for Suzuki GS models.
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
-
MIKUNI Needle Jet 785-24001-O-0
MIKUNI
$15.49Precise mid-range throttle response separates a well-tuned carbureted engine from one that's merely adequate. The MIKUNI Needle Jet 785-24001-O-0 gives you direct control over fuel delivery in the critical 1/4 to 3/4 throttle band—the range where most...389O0- SKU:
- 389O0
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- FEATURES:
- FOR TM 32 MM - 33 MM SPIGOT
- JET SIZE:
- O-0
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- UNITS:
- EACH
- MATERIAL:
- BRASS
- MODEL:
- TYPE 389
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
$15.49Qty in Cart: 0Quantity:Price:$15.49Subtotal: -
MIKUNI Needle Jet 785-24001-Q-8
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance demands precision, and a genuine Mikuni needle jet is non-negotiable if you want consistent throttle response across the 1/4 to 3/4 opening range. This OEM component directly controls fuel atomization...389Q8- SKU:
- 389Q8
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- JET SIZE:
- Q-8
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- FEATURES:
- FOR TM 32 MM - 33 MM SPIGOT
- MATERIAL:
- BRASS
- MODEL:
- TYPE 389
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$15.49 -
MIKUNI Carburetor BN40I-38-24
MIKUNI
$485.95A carburetor is the heart of your fuel delivery system, and worn or mismatched units compromise throttle response, fuel economy, and overall engine performance. The MIKUNI BN40I-38-24 restores OE-specification precision tuning without the guesswork of...10020032- SKU:
- 10020032
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- PRODUCT NAME:
- CARBURETOR
- BASE COLOR:
- BLACK
- UNITS:
- EACH
- CARBURETOR SIZE METRIC:
- 38.00 MM
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- WATERCRAFT
$485.95 -
MIKUNI Carburetor BN44-40-8067
MIKUNI
$331.95High-performance watercraft demand a carburetor engineered for precision tuning and reliability under extreme conditions. The MIKUNI BN44-40-8067 delivers externally adjustable metering and pop-off calibration, allowing you to dial in fuel delivery...10020033- SKU:
- 10020033
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- CARBURETOR SIZE METRIC:
- 46.00 MM
- UNITS:
- EACH
- PRODUCT NAME:
- CARBURETOR
- RIDING STYLE:
- WATERCRAFT
- FEATURES:
- NO BUTTERFLY CHOKE
$331.95 -
MIKUNI Main Jet #280 - 4-Pack 4/042-280
MIKUNI
$14.56Precise jetting is the foundation of carburetor tuning—get it wrong and you're leaving power on the table or running dangerously lean. The MIKUNI Main Jet #280 is engineered for applications that demand a richer fuel mixture, ensuring proper atomization...KM4042280- SKU:
- KM4042280
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- 4 PACK
- JET SIZE:
- 280
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH IMPERIAL:
- 0.47'
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER METRIC:
- 6.00 MM
- PRODUCT NAME:
- JET
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
$14.56 -
MIKUNI Main Jet #310 - 4-Pack 4/042-310
MIKUNI
$14.56Carburetor tuning demands precision, and a worn or incorrect main jet directly impacts fuel delivery at full throttle—compromising both power and reliability. This genuine Mikuni #310 jet pack gives you the exact orifice sizing needed to optimize your...KM4042310- SKU:
- KM4042310
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH:
- 12 MM (0,47')
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- HEAD TYPE:
- HEX HEAD
- JET SIZE:
- 310
- MATERIAL:
- BRASS
$14.56 -
MIKUNI Main Jet #320 - 4-Pack 4/042-320
MIKUNI
$14.56Fine-tuning your carburetor's fuel delivery is critical for achieving optimal engine performance, whether you're dialing in a race engine or restoring a classic machine. The MIKUNI #320 main jet delivers precise fuel metering that directly impacts...KM4042320- SKU:
- KM4042320
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 320
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH:
- 12 MM (0,47')
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- TYPE:
- MAIN
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
$14.56 -
MIKUNI Main Jet #330 - 4-Pack 4/042-330
MIKUNI
$14.56Fine-tuning your carburetor's fuel delivery is critical to achieving peak performance and reliability, especially in high-demand racing applications. The MIKUNI Main Jet #330 delivers precise metering for engines that require richer fuel mixtures,...KM4042330- SKU:
- KM4042330
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- JET
- RIDING STYLE:
- STREET
- HEAD TYPE:
- HEX HEAD
- JET SIZE:
- 330
- MATERIAL:
- BRASS
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- UNITS:
- 4 PACK
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
$14.56 -
MIKUNI Main Jet #340 - 4-Pack 4/042-340
MIKUNI
$5.20Tuning your Mikuni carburetor requires precision—and a mismatched main jet will cost you performance, throttle response, and reliability. This 4-pack of OEM-specification #340 main jets ensures your fuel mixture hits the sweet spot across the RPM band,...KM4042340- SKU:
- KM4042340
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL LENGTH IMPERIAL:
- 0.47'
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- JET SIZE:
- 340
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- MAIN
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH METRIC:
- 12 MM
- UNITS:
- 4 PACK
$5.20 -
MIKUNI Main Jet #350 - 4-Pack 4/042-350
MIKUNI
$14.56Precision jetting is the foundation of carburetor tuning—get it wrong, and you're leaving horsepower on the table and risking lean-condition damage. The MIKUNI Main Jet #350 delivers the exact fuel metering your engine needs for optimal combustion across...KM4042350- SKU:
- KM4042350
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OVERALL LENGTH:
- 12 MM (0,47')
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- FEATURES:
- FOR VM CARBURETORS
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- OVERALL LENGTH IMPERIAL:
- 0.47'
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- 4 PACK
- JET SIZE:
- 350
- OVERALL DIAMETER METRIC:
- 6.00 MM
- PRODUCT NAME:
- JET
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
$14.56 -
MIKUNI Main Jet #360 - 4-Pack 4/042-360
MIKUNI
$14.56Precise fuel delivery is the foundation of carburetor tuning, and running the correct main jet is non-negotiable for optimal air-fuel ratio across the power band. The MIKUNI #360 main jet delivers consistent atomization and metering that matches OEM...KM4042360- SKU:
- KM4042360
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- OVERALL DIAMETER:
- 6,00 MM (0,24')
- OVERALL DIAMETER METRIC:
- 6.00 MM
- OVERALL LENGTH IMPERIAL:
- 0.47'
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- UTV
- TYPE:
- MAIN
- OVERALL DIAMETER IMPERIAL:
- 0.24'
- RIDING STYLE:
- STREET
- HEAD TYPE:
- HEX HEAD
- MATERIAL:
- BRASS
- OVERALL LENGTH:
- 12 MM (0,47')
- OVERALL LENGTH METRIC:
- 12 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- UNITS:
- 4 PACK
- FEATURES:
- FOR VM CARBURETORS
- JET SIZE:
- 360
- RIDING STYLE:
- ATV
$14.56 -
MIKUNI Super BN Carburetor Series Needle Valve Assembly 786-35015-1.5
MIKUNI
$24.15A properly functioning needle valve assembly is critical to precise fuel metering in any Super BN carburetor setup—lean mixture issues, hesitation, and flooding all trace back to worn or damaged needle seats. This genuine Mikuni replacement restores OEM...7863501515- SKU:
- 7863501515
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
$24.15 -
MIKUNI Super BN Carburetor Series Needle Valve Assembly 786-35015-2.0
MIKUNI
$24.15A worn or damaged needle valve directly compromises fuel delivery precision, leading to poor throttle response and unstable idle conditions. This genuine Mikuni needle and seat assembly restores the critical seal required for consistent carburetor...7863501520- SKU:
- 7863501520
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
$24.15 -
MIKUNI Standard BN Carburetor Series Needle and Seat VM26/26-2.0
MIKUNI
$24.15The needle and seat assembly is the critical flow-control component in your Mikuni carburetor—wear or contamination here directly impacts fuel delivery precision and engine idle quality. A worn assembly causes hesitation, poor fuel economy, and...VM262620- SKU:
- VM262620
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$24.15 -
MOOSE RACING Air Filter - Kawasaki 1-40-40
MOOSE RACING
$26.95A quality air filter is your engine's first line of defense against contamination that degrades performance and shortens engine life. The MOOSE RACING 1-40-40 employs a proven dual-foam construction that maximizes both filtration efficiency and...M7614040- SKU:
- M7614040
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- BASE COLOR:
- WHITE
- FILTER MEDIA MATERIAL:
- FOAM
- PRODUCT NAME:
- AIR FILTER
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- WHITE
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$26.95 -
MOOSE RACING Air Filter - KX125/250 '92-'93 1-40-43
MOOSE RACING
$29.95A clogged or poorly sealed air filter kills power and invites engine damage—especially on high-revving two-strokes like the KX125/250. The MOOSE RACING Air Filter delivers the dual-foam protection your bike needs to breathe freely in dusty track...M7614043- SKU:
- M7614043
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BASE COLOR:
- WHITE
- FILTER MEDIA MATERIAL:
- FOAM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- AIR FILTER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$29.95 -
MOOSE RACING Air Filter - KX125/250 '94-'06 1-40-44
MOOSE RACING
$29.95When you're pushing a KX125 or KX250 to the limit, a compromised air filter means contaminated fuel mixture and lost horsepower at the worst moment. MOOSE Racing's dual-foam design traps everything from coarse sand to fine dust without choking your...M7614044- SKU:
- M7614044
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BASE COLOR:
- WHITE
- FILTER MEDIA MATERIAL:
- FOAM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- AIR FILTER
- RIDING STYLE:
- OFF-ROAD
$29.95 -
MOOSE RACING Air Filter - RMX '89-'98 1-40-90
MOOSE RACING
$26.95Dirt and dust ingestion kills engine performance and longevity—especially on the track or trail. The MOOSE RACING Air Filter for RMX '89-'98 models combines dual-layer foam construction with a reliable neoprene seal to deliver consistent airflow while...M7614090- SKU:
- M7614090
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- AIR FILTER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- BASE COLOR:
- WHITE
- FILTER MEDIA MATERIAL:
- FOAM
$26.95 -
MOOSE RACING Air Filter 1-50-04
MOOSE RACING
$26.95Engine air quality directly impacts horsepower, throttle response, and engine longevity. The MOOSE RACING 1-50-04 delivers superior filtration across a dual-foam design that traps both large debris and fine particulates without sacrificing...M7615004- SKU:
- M7615004
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- AIR FILTER
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- BASE COLOR:
- WHITE
- FILTER MEDIA MATERIAL:
- FOAM
$26.95 -
MOOSE RACING Air Filter - KTM 50 '01-'08 1-50-05
MOOSE RACING
$6.95A quality air filter is non-negotiable for KTM 50 performance—it directly impacts throttle response, engine longevity, and fuel efficiency. The MOOSE RACING Air Filter uses a proven two-layer foam design that balances maximum airflow with superior...M7615005- SKU:
- M7615005
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COLOR/FINISH:
- WHITE
- FILTER MEDIA MATERIAL:
- FOAM
- PRODUCT NAME:
- AIR FILTER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BASE COLOR:
- WHITE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$6.95
