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
-
BOYESEN Single-Stage Reed - Carbon - Kawasaki SSC012
BOYESEN
$50.95Reed valve performance directly impacts your snowmobile's power delivery and throttle response across the entire RPM band. The BOYESEN Single-Stage Reed in carbon construction replaces worn OEM reeds with precision-engineered components that restore...SSC012- SKU:
- SSC012
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- MATERIAL:
- CARBON
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- REED PETAL
- RIDING STYLE:
- ATV
$50.95 -
BOYESEN Pro Series Reeds - CR250 '01 PRO146
BOYESEN
$62.95If you're running a CR250 and want measurable gains in throttle response and acceleration, upgrading to Boyesen Pro Series Reeds is one of the most direct ways to unlock performance. These reeds respond instantly to piston speed changes, eliminating the...PRO146- SKU:
- PRO146
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MODEL:
- PRO SERIES
- PRODUCT NAME:
- REED PETAL
- MATERIAL:
- CARBON FIBER
- UNITS:
- SET
- BASE COLOR:
- YELLOW
- TYPE:
- DUAL STAGE
- RIDING STYLE:
- OFF-ROAD
$62.95 -
BOYESEN Pro Series Reed for RAD01F PSR145
BOYESEN
$64.95The Boyesen Pro Series Reed delivers the throttle response and acceleration you need to stay competitive on the track. Its dual-stage carbon fiber and fiberglass construction responds instantly to piston speed changes, giving you consistent power...PRO145- SKU:
- PRO145
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- YELLOW
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
- UNITS:
- SET
- MATERIAL:
- CARBON FIBER
- MODEL:
- PRO SERIES
$64.95Qty in Cart: 0Quantity:Price:$64.95Subtotal: -
BOYESEN Pro Series Reed - CR125 '01-'02 PRO144
BOYESEN
$62.95Stock reeds limit your CR125's potential—they can't keep pace with aggressive throttle inputs or maximize the power your engine is capable of producing. Boyesen Pro Series Reeds transform your intake efficiency with a precision-engineered dual-stage...PRO144- SKU:
- PRO144
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- CARBON FIBER
- MODEL:
- PRO SERIES
- BASE COLOR:
- YELLOW
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$62.95 -
MOTION PRO Dual Quick-Disconnect Coupling - 1/4" 12-0037
MOTION PRO
$49.99Quick-disconnect couplings are essential for any fuel system requiring frequent service, maintenance, or configuration changes—eliminating messy spillage and downtime. The MOTION PRO Dual Quick-Disconnect Coupling delivers reliable, leak-free connections...P12037- SKU:
- P12037
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- FITTING CONNECTOR TYPE IMPERIAL:
- 1/4' HOSE BARB
- PRODUCT NAME:
- COUPLING
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- STYLE:
- DUAL
- COLOR/FINISH:
- WHITE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- FEATURES:
- QUICK DISCONNECT
- FITTING CONNECTOR TYPE METRIC:
- 6.4 MM HOSE BARB
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- FUEL LINE
- UNITS:
- EACH
- BASE COLOR:
- WHITE
- FITTING CONNECTOR TYPE:
- 6,4 MM (1/4') HOSE BARB
- RIDING STYLE:
- STREET
$49.99 -
MIKUNI Needle Valve Arm Spring - 80 grams 730-03033
MIKUNI
$2.84Precise fuel metering is the foundation of reliable carburetor performance, and a worn or damaged needle valve arm spring directly compromises your engine's tuning stability. This OEM-specification MIKUNI spring restores factory-correct pressure on the...999730015- SKU:
- 999730015
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- SPRING
- RIDING STYLE:
- WATERCRAFT
- SPRING RATE METRIC:
- 80.00 G
- TYPE:
- NEEDLE VALVE
$2.84 -
MIKUNI Needle Valve Arm Spring - 65 grams 730-03030
MIKUNI
$2.84Precision fuel delivery starts with reliable needle valve components. The MIKUNI Needle Valve Arm Spring maintains consistent spring tension to ensure accurate carburetor response across varying engine conditions. This genuine OEM replacement part...73003030- SKU:
- 73003030
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- SPRING
- RIDING STYLE:
- WATERCRAFT
- SPRING RATE METRIC:
- 65.00 G
- TYPE:
- NEEDLE VALVE
- UNITS:
- EACH
$2.84 -
MIKUNI Needle Valve Arm Spring - 115 grams 730-03027
MIKUNI
$2.84The MIKUNI Needle Valve Arm Spring is a precision replacement component engineered for carburetors that demand reliable fuel metering across varying engine speeds and loads. If your MIKUNI carb is running rich, surging, or exhibiting inconsistent idle...73003027- SKU:
- 73003027
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- SPRING RATE METRIC:
- 115.00 G
- TYPE:
- NEEDLE VALVE
- UNITS:
- EACH
- PRODUCT NAME:
- SPRING
- RIDING STYLE:
- WATERCRAFT
$2.84 -
BOYESEN Racing Reeds - KX250 692
BOYESEN
$39.95Boyesen dual-stage reeds are engineered to maximize intake flow velocity across your entire powerband, delivering measurable gains from cold start through peak acceleration. Laboratory flow analysis confirms these reeds substantially outperform OEM...692- SKU:
- 692
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- UNITS:
- SET
- PRODUCT NAME:
- REED PETAL
- RIDING STYLE:
- OFF-ROAD
$39.95 -
BOYESEN Racing Reeds - KX125 691
BOYESEN
$39.95Boyesen racing reeds are engineered to maximize your KX125's intake efficiency across the entire RPM band. Laboratory flow analysis demonstrates that dual-stage reed design delivers superior velocity and responsiveness compared to OEM reeds, translating...691- SKU:
- 691
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REED PETAL
- UNITS:
- SET
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- RIDING STYLE:
- OFF-ROAD
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
BOYESEN Reed - TM/Honda 690
BOYESEN
$39.95Stock reeds limit your engine's breathing potential, restricting flow velocity across critical RPM ranges and costing you performance from cold start through peak acceleration. Boyesen's dual-stage reed design eliminates this bottleneck through...690- SKU:
- 690
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- REED PETAL
- UNITS:
- SET
- MODEL:
- POWER REED
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- TYPE:
- DUAL STAGE
$39.95 -
BOYESEN Reed - YZ250 '99-'00 689
BOYESEN
$39.95Stock reed valves restrict flow and limit your YZ250's potential across the entire RPM range. Boyesen's dual-stage reed design has been lab-proven to deliver higher flow velocity at all operating pressures, translating to sharper throttle response off...689- SKU:
- 689
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- POWER REED
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
BOYESEN Reed - KX250 '99 688
BOYESEN
$39.95The stock reed valve is your two-stroke's bottleneck. Boyesen's dual-stage reed design eliminates that restriction, delivering measurably higher flow velocity across your entire power band—from crisp throttle response at low RPM to sustained acceleration...688- SKU:
- 688
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- POWER REED
- UNITS:
- SET
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
BOYESEN Reed - KTM250/380 686
BOYESEN
$39.95Stock reed valves are the silent bottleneck in your KTM's intake system—they restrict flow and cost you power at every RPM. The Boyesen dual-stage reed design eliminates this limitation by maintaining optimal valve timing across your entire operating...686- SKU:
- 686
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- FIBERGLASS
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- POWER REED
- RIDING STYLE:
- ATV
- UNITS:
- SET
- BASE COLOR:
- YELLOW
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
$39.95 -
BOYESEN Reed - CR250 '99-'00 684
BOYESEN
$39.95If you're running a CR250 and leaving performance on the table, your reed valve design is likely the culprit. Boyesen's dual-stage reed technology has been laboratory-proven to deliver superior flow characteristics across your entire power band,...684- SKU:
- 684
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- REED PETAL
- UNITS:
- SET
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
BOYESEN Racing Reed - RM250 '98-'00 681
BOYESEN
$39.95Stock reeds limit your RM250's potential across the entire power band—from initial throttle response to peak acceleration. Boyesen's dual-stage reed design has been lab-proven to deliver superior flow velocity at all operating pressures, translating to...681- SKU:
- 681
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
- MODEL:
- POWER REED
- UNITS:
- SET
$39.95 -
BOYESEN Racing Reed - Yamaha 679
BOYESEN
$39.95The Boyesen Racing Reed for Yamaha 679 delivers measurable performance gains across your entire powerband, from low-end responsiveness to peak acceleration. Laboratory flow analysis confirms that Boyesen's dual-stage reed design permits greater flow...679R- SKU:
- 679R
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- FIBERGLASS
- TYPE:
- DUAL STAGE
- BASE COLOR:
- YELLOW
- UNITS:
- SET
- PRODUCT NAME:
- REED PETAL
- MODEL:
- POWER REED
- RIDING STYLE:
- OFF-ROAD
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
BOYESEN Racing Reeds - KTM50 678
BOYESEN
$34.95Stock reed valves limit your KTM50's potential across the entire RPM range. Boyesen's dual-stage reed design has been laboratory-validated to deliver superior flow velocity and responsiveness, translating to measurable gains from cold starts through peak...678X- SKU:
- 678X
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MODEL:
- POWER REED
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- DUAL STAGE
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- UNITS:
- SET
$34.95 -
BOYESEN Racing Reed - Honda 664
BOYESEN
$39.95The Boyesen Racing Reed for Honda 664 engines delivers measurable flow improvements across your entire operating range, directly translating to faster throttle response and stronger acceleration. Laboratory flow analysis confirms that Boyesen's...664- SKU:
- 664
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MODEL:
- POWER REED
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
$39.95 -
BOYESEN Racing Reed - Husqvarna 662
BOYESEN
$48.95Stock reed valves are a limiting factor in two-stroke performance, restricting flow velocity across your power band and leaving power on the table. The Boyesen Racing Reed for Husqvarna 662 leverages laboratory-proven dual-stage technology to deliver...662- SKU:
- 662
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- UNITS:
- SET
- PRODUCT NAME:
- REED PETAL
- RIDING STYLE:
- OFF-ROAD
$48.95
