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 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...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...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...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...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...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...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...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
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
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...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...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
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
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...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,...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
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
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...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...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
$48.95Qty in Cart: 0Quantity:Price:$48.95Subtotal: -
BOYESEN Racing Reed - YZ80 '93-'01 648
BOYESEN
$34.95The Boyesen Racing Reed transforms your YZ80's intake flow dynamics by optimizing pressure velocity across the entire RPM band. Laboratory-tested dual-stage reed design delivers measurable gains in...648R- SKU:
- 648R
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MODEL:
- POWER REED
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
$34.95 -
BOYESEN Racing Reed - Suzuki RM/X250 647
BOYESEN
$39.95Stock reeds limit your RM/X250's potential across the entire power band—from bottom-end response to peak acceleration. The Boyesen Racing Reed leverages dual-stage reed technology validated through...647R- SKU:
- 647R
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- REED PETAL
- UNITS:
- SET
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- TYPE:
- DUAL STAGE
- MODEL:
- POWER REED
- RIDING STYLE:
- OFF-ROAD
$39.95 -
BOYESEN Reed Kawasaki/Yamaha 646
BOYESEN
$34.95Stock reed valves limit your engine's breathing potential across the entire RPM range, leaving performance on the table from idle to redline. The Boyesen dual-stage reed design increases flow...646- SKU:
- 646
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- UNITS:
- SET
- PRODUCT NAME:
- REED PETAL
- RIDING STYLE:
- OFF-ROAD
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
BOYESEN Racing Reed - Yamaha 644
BOYESEN
$39.95Reed valves are the circulatory system of your two-stroke engine—they control intake timing and flow to generate power. The Boyesen Racing Reed for Yamaha 644 uses laboratory-proven dual-stage...644R- SKU:
- 644R
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- BASE COLOR:
- YELLOW
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- UNITS:
- SET
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
BOYESEN Racing Reed - Suzuki 643
BOYESEN
$39.95Your engine's reed valve is the gatekeeper of performance—restrict flow, and you're leaving horsepower on the table. Boyesen's dual-stage racing reed design has been laboratory-validated to deliver...643R- SKU:
- 643R
- 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
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
BOYESEN Racing Reeds - Suzuki/Yamaha 642
BOYESEN
$39.95Boyesen racing reeds are engineered to deliver measurable flow improvements across your entire power band—from initial throttle response to peak acceleration. Laboratory flow analysis confirms that...642- SKU:
- 642
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
- UNITS:
- SET
- MODEL:
- POWER REED
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
BOYESEN Racing Reed - Yamaha 640
BOYESEN
$39.95Your Yamaha 640's intake efficiency directly impacts power delivery across the entire RPM range. Boyesen's dual-stage reed design increases flow velocity and pressure consistency, translating to...640R- SKU:
- 640R
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- SET
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- POWER REED
$39.95
