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
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MIKUNI Needle and Seat N149040-28
MIKUNI
$24.15The needle and seat assembly is a critical component in carburetor fuel metering—when it wears, you'll experience flooding, lean conditions, or inconsistent jetting across the RPM range. Genuine Mikuni replacements restore precise fuel control and...N14904028- SKU:
- N14904028
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$24.15 -
MIKUNI Coupling Kit for Duals MK-BN/001
MIKUNI
$52.95Running dual Mikuni carburetors requires precision synchronization to deliver consistent fuel atomization across both units—any imbalance degrades throttle response and creates flat spots in your power band. The MIKUNI Coupling Kit (MK-BN/001) solves...MKBN001- SKU:
- MKBN001
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- JET KIT
- TYPE:
- CARBURETOR
- UNITS:
- KIT
- BASE COLOR:
- BLACK
- RIDING STYLE:
- WATERCRAFT
$52.95 -
MIKUNI Standard BN Carburetor Series Repair Kit MK-BN38/44
MIKUNI
$40.99A worn or deteriorating diaphragm can leave your Mikuni carburetor running lean, causing stumbling, hesitation, and unpredictable jetting. This repair kit restores proper fuel metering and atomization without the cost and downtime of a complete...MKBN3844- SKU:
- MKBN3844
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
- PRODUCT NAME:
- JET KIT
- TYPE:
- CARBURETOR
$40.99 -
MIKUNI Super BN Series Carburetor Rebuild Kit MK-BN38/44 SPR
MIKUNI
$85.95A MIKUNI Super BN Series carburetor demands precision tuning to maintain peak performance, and worn internal components directly compromise fuel atomization and throttle response. This complete rebuild kit supplies all gaskets, seals, jets, and internal...MKBN3844SPR- SKU:
- MKBN3844SPR
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- JET KIT
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
- TYPE:
- CARBURETOR
$85.95 -
MIKUNI Super/HP Carburetor Series Needle Valve Kit MK-BN44 NV 2
MIKUNI
$25.99If you're running a high-performance carbureted engine, fuel delivery consistency directly impacts throttle response and peak power output. This needle valve kit eliminates pop-off inconsistencies that plague stock setups, allowing you to dial in precise...MKBN3844SPR2- SKU:
- MKBN3844SPR2
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- NEEDLE VALVE KIT
- RIDING STYLE:
- WATERCRAFT
- SPRING RATE METRIC:
- 80.00 G
- UNITS:
- KIT
$25.99 -
MIKUNI Power Jet Kit with Jets MK-406
MIKUNI
$26.99If you're running a VM-type Mikuni carburetor and want to unlock better throttle response and midrange performance, the MIKUNI Power Jet Kit with Jets MK-406 gives you the tuning capability to do it. This conversion kit transforms your standard VM carb...VMPJK- SKU:
- VMPJK
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- JET KIT
- RIDING STYLE:
- ATV
$26.99 -
MIKUNI Needle Jet VM34/05-O-6
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance requires precision, and the MIKUNI Needle Jet VM34/05-O-6 delivers exactly that. This genuine Mikuni component allows you to dial in the critical 1/4 to 3/4 throttle range—where most real-world riding...159O6- SKU:
- 159O6
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- JET SIZE:
- O-6
- MODEL:
- TYPE 159
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
$15.49 -
MIKUNI Needle Jet VM34/05-O-8
MIKUNI
$15.49Precision carburetor tuning demands components built to exacting standards, and the genuine MIKUNI Needle Jet VM34/05-O-8 delivers exactly that. This OEM-spec needle jet gives you direct control over fuel delivery in the critical 1/4 to 3/4 throttle...159O8- SKU:
- 159O8
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- JET
- RIDING STYLE:
- UTV
- TYPE:
- NEEDLE
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- SNOW
- JET SIZE:
- O-8
- MATERIAL:
- BRASS
- MODEL:
- TYPE 159
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$15.49 -
MIKUNI Needle Jet 990-793-004-P-0
MIKUNI
$15.49Precise carburetor tuning separates competitive racers from the rest, and needle jets are essential for dialing in your mid-range throttle response. The MIKUNI 990-793-004-P-0 needle jet gives you granular control over fuel delivery at 1/4 to 3/4...159P0- SKU:
- 159P0
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
- UNITS:
- EACH
- MATERIAL:
- BRASS
- MODEL:
- TYPE 159
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- JET SIZE:
- P-0
$15.49 -
MIKUNI Needle Jet 990-793-004-P-2
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance requires precision, and a genuine Mikuni needle jet is the tool that delivers it. The needle jet directly controls fuel delivery during the critical 1/4 to 3/4 throttle range—where most real-world...159P2- SKU:
- 159P2
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- BRASS
- MODEL:
- TYPE 159
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- JET SIZE:
- P-2
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
$15.49 -
MIKUNI Needle Jet 990-793-004-P-4
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance requires precision, and the MIKUNI Needle Jet 990-793-004-P-4 delivers exactly that. This genuine Mikuni component gives you direct control over fuel metering in the critical 1/4 to 3/4 throttle...159P4- SKU:
- 159P4
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- BRASS
- MODEL:
- TYPE 159
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- SNOW
- JET SIZE:
- P-4
- PRODUCT NAME:
- JET
- RIDING STYLE:
- UTV
- TYPE:
- NEEDLE
$15.49 -
MIKUNI Needle Jet 990-793-004-P-5
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance requires precision, and the MIKUNI Needle Jet 990-793-004-P-5 delivers exactly that. This genuine Mikuni component gives you direct control over fuel-air mixture at 1/4 to 3/4 throttle opening—the RPM...159P5- SKU:
- 159P5
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- TYPE 159
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- JET SIZE:
- P-5
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
$15.49 -
MIKUNI Needle Jet 990-793-004-P-6
MIKUNI
$15.49Precise carburetor tuning requires the right needle jet, and the MIKUNI 990-793-004-P-6 delivers the mid-range fuel curve adjustments serious tuners demand. Whether you're dialing in a 1/4-throttle cruising sweet spot or optimizing 3/4-throttle...159P6- SKU:
- 159P6
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- MODEL:
- TYPE 159
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- JET SIZE:
- P-6
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
$15.49 -
MIKUNI Needle Jet 990-793-004-Q-0
MIKUNI
$15.49Precise carburetor tuning separates a dialed-in engine from one that merely runs. The MIKUNI Needle Jet 990-793-004-Q-0 gives you direct control over fuel delivery in the critical 1/4 to 3/4 throttle range, where most street and track driving happens. As...159Q0- SKU:
- 159Q0
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MODEL:
- TYPE 159
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- JET SIZE:
- Q-0
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- FEATURES:
- FOR VM 30 MM - 36 MM SPIGOT
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
$15.49 -
MIKUNI Needle Jet 990-793-003-P-0
MIKUNI
$15.49Carburetor tuning at part-throttle conditions requires precision—and that's where needle jets make their impact. The MIKUNI 990-793-003-P-0 is a genuine Mikuni component engineered to give you direct control over fuel atomization in the 1/4 to 3/4...166P0- SKU:
- 166P0
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- JET SIZE:
- P-0
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- UNITS:
- EACH
- FEATURES:
- FOR VM38 MM SPIGOT
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- TYPE 166
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$15.49 -
MIKUNI Needle Jet 990-793-003-P-2
MIKUNI
$15.49Precise mid-range throttle response is critical to dialing in your carbureted engine, and needle jet selection directly controls fuel delivery in the 1/4 to 3/4 throttle window where most driving occurs. The genuine MIKUNI Needle Jet 990-793-003-P-2 is...166P2- SKU:
- 166P2
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MODEL:
- TYPE 166
- FEATURES:
- FOR VM38 MM SPIGOT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- MATERIAL:
- BRASS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- JET SIZE:
- P-2
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ATV
- TYPE:
- NEEDLE
$15.49 -
MIKUNI Needle Jet 990-793-003-P-4
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance—where most of your throttle input happens—requires precision components that won't compromise your engine's responsiveness. The MIKUNI Needle Jet 990-793-003-P-4 is a genuine Mikuni component designed...166P4- SKU:
- 166P4
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- MODEL:
- TYPE 166
- RIDING STYLE:
- ATV
- JET SIZE:
- P-4
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- FEATURES:
- FOR VM38 MM SPIGOT
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
$15.49 -
MIKUNI Needle Jet 990-793-003-P-5
MIKUNI
$15.49Precise carburetor tuning is the foundation of responsive throttle control and optimal fuel atomization across the mid-range throttle band. The MIKUNI Needle Jet 990-793-003-P-5 is an OEM Mikuni component engineered for fine-tuning fuel delivery between...166P5- SKU:
- 166P5
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- JET SIZE:
- P-5
- PRODUCT NAME:
- JET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- FEATURES:
- FOR VM38 MM SPIGOT
- MODEL:
- TYPE 166
- TYPE:
- NEEDLE
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- UNITS:
- EACH
$15.49 -
MIKUNI Needle Jet 990-793-003-P-6
MIKUNI
$15.49Fine-tuning your carburetor's mid-range performance doesn't have to mean a complete rebuild. The MIKUNI Needle Jet 990-793-003-P-6 is a genuine Mikuni component that gives you direct control over fuel delivery in the critical 1/4 to 3/4 throttle...166P6- SKU:
- 166P6
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- BRASS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- JET SIZE:
- P-6
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- JET
- RIDING STYLE:
- UTV
- TYPE:
- NEEDLE
- FEATURES:
- FOR VM38 MM SPIGOT
- MODEL:
- TYPE 166
- RIDING STYLE:
- SNOW
$15.49 -
MIKUNI Needle Jet 990-793-003-P-8
MIKUNI
$15.49Needle jet selection is critical for carburettor tuning in the mid-range throttle band—where your engine spends most of its time. The MIKUNI 990-793-003-P-8 offers precise fuel delivery calibration at 1/4 to 3/4 throttle opening, allowing you to dial in...166P8- SKU:
- 166P8
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- FEATURES:
- FOR VM38 MM SPIGOT
- RIDING STYLE:
- OFF-ROAD
- JET SIZE:
- P-8
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- JET
- TYPE:
- NEEDLE
- UNITS:
- EACH
- MATERIAL:
- BRASS
- MODEL:
- TYPE 166
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
$15.49
