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 Racing Reed - Kawasaki 639
BOYESEN
$39.95Stock reeds limit your Kawasaki 639's potential across the entire power band—from initial throttle response to peak acceleration. Boyesen's dual-stage reed design increases flow velocity at every operating pressure, unlocking measurable performance gains...639R- SKU:
- 639R
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
- MODEL:
- POWER REED
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
$39.95 -
BOYESEN Racing Reed - Kawasaki 638
BOYESEN
$48.95Boyesen racing reeds are engineered to maximize intake flow velocity across your entire powerband, delivering measurable performance gains from cold start through peak acceleration. Laboratory flow analysis confirms that Boyesen's dual-stage reed design...638R- SKU:
- 638R
- 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
$48.95Qty in Cart: 0Quantity:Price:$48.95Subtotal: -
BOYESEN Racing Reed - Suzuki 637
BOYESEN
$39.95Boyesen Racing Reeds represent a measurable upgrade for serious racers and high-performance builders who demand maximum intake efficiency. Laboratory flow analysis confirms that Boyesen's dual-stage design delivers greater flow velocity across the entire...637R- SKU:
- 637R
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- TYPE:
- DUAL STAGE
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- REED PETAL
- UNITS:
- SET
- MODEL:
- POWER REED
- RIDING STYLE:
- OFF-ROAD
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
BOYESEN Racing Reed - Honda 636
BOYESEN
$48.95The reed valve is your two-stroke's gatekeeper to performance—and stock reeds leave power on the table. Boyesen's dual-stage design has been laboratory-proven to increase flow velocity across the entire operating range, delivering measurable gains from...636R- SKU:
- 636R
- 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
$48.95 -
BOYESEN Racing Reed 633
BOYESEN
$39.95The Boyesen Racing Reed 633 delivers measurable flow improvements across your entire powerband, translating directly to sharper throttle response and stronger acceleration from idle to redline. Laboratory flow analysis confirms that Boyesen's dual-stage...633- SKU:
- 633
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- SET
- MODEL:
- POWER REED
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
$39.95 -
BOYESEN Racing Reed - Honda 631
BOYESEN
$34.95If you're running a Honda 631 two-stroke, your reed valve is the gatekeeper to performance—and a stock reed won't cut it if you're serious about acceleration and top-end power. The Boyesen Racing Reed replaces the factory limitation with...631- SKU:
- 631
- 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
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
BOYESEN Racing Reed - Kawasaki/Blaster 630
BOYESEN
$34.95Stock reeds restrict your intake flow and limit acceleration potential across the entire RPM range. The Boyesen Racing Reed dual-stage design proven through laboratory flow analysis delivers measurably higher flow velocity, translating to faster throttle...630R- SKU:
- 630R
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- RIDING STYLE:
- ATV
- TYPE:
- DUAL STAGE
- UNITS:
- SET
- MODEL:
- POWER REED
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
BOYESEN Racing Reed - Suzuki 628
BOYESEN
$34.95The reed valve is your engine's gatekeeper—it controls fuel-air mixture timing with precision that directly impacts throttle response and peak power. Boyesen's dual-stage reed design has been proven through laboratory flow analysis to outperform standard...628- SKU:
- 628
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- REED PETAL
- UNITS:
- SET
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- RIDING STYLE:
- ATV
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
BOYESEN Racing Reed - Yamaha 627
BOYESEN
$34.95The intake charge enters your engine through the reed valve—and that's where power is either gained or lost. Boyesen's dual-stage reed design increases flow velocity across the entire operating pressure range, meaning better scavenging from idle through...627- SKU:
- 627
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BASE COLOR:
- YELLOW
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
$34.95 -
BOYESEN Racing Reed - Kawasaki 626
BOYESEN
$39.95The BOYESEN Racing Reed delivers measurable flow improvements across your entire powerband, translating directly to faster acceleration and sharper throttle response. Laboratory flow analysis confirms that Boyesen's dual-stage reed design outperforms OEM...626- SKU:
- 626
- 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
$39.95 -
BOYESEN Racing Reed - Honda 625
BOYESEN
$48.95The BOYESEN Racing Reed for Honda 625 engines delivers measurable flow improvements across your entire operating range, translating to faster throttle response and stronger acceleration. Laboratory flow analysis confirms the dual-stage reed design...625- SKU:
- 625
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- REED PETAL
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- UNITS:
- SET
$48.95 -
BOYESEN Racing Reed - Yamaha 624
BOYESEN
$48.95The stock reed valve is one of the most overlooked restrictions in your intake tract—and Boyesen's dual-stage design directly addresses this bottleneck. By optimizing flow velocity across the entire operating range, this reed improves throttle response...624- SKU:
- 624
- 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
$48.95 -
On Sale
BOYESEN Racing Reed - Kawasaki 621
BOYESEN
MSRP: $48.95Now: $31.00Was: $48.95The Boyesen Racing Reed for Kawasaki 621 engines delivers measurable flow improvements across your entire powerband, translating directly to stronger acceleration and more responsive throttle control. Laboratory flow analysis confirms that Boyesen's...621- SKU:
- 621
- 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
MSRP: $48.95Now: $31.00Was: $48.95 -
BOYESEN Racing Reed - Kawasaki/Yamaha 620
BOYESEN
$28.95Stock reed valves limit your engine's breathing potential, costing you power from idle all the way to peak RPM. Boyesen's dual-stage reed design has been laboratory-validated to outflow standard reeds across the entire operating pressure range,...620- SKU:
- 620
- 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
$28.95 -
BOYESEN Racing Reed - Maico 619
BOYESEN
$39.95Boyesen's dual-stage reed design directly addresses the performance ceiling of stock intake systems. Laboratory flow analysis confirms these reeds deliver superior flow velocity across your entire operating range, translating to measurable gains from...619- SKU:
- 619
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BASE COLOR:
- YELLOW
- MODEL:
- POWER REED
- MATERIAL:
- FIBERGLASS
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
$39.95 -
BOYESEN Racing Reed - KTM 618
BOYESEN
$48.95Your KTM 618's intake system is only as efficient as its reed valves—and stock reeds leave significant performance on the table. The Boyesen Racing Reed replaces restrictive factory reeds with a dual-stage design that increases flow velocity across your...618- SKU:
- 618
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- REED PETAL
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- UNITS:
- SET
$48.95Qty in Cart: 0Quantity:Price:$48.95Subtotal: -
BOYESEN Racing Reed - KTM 617
BOYESEN
$39.95Your engine's breathing efficiency directly impacts acceleration response and top-end power delivery. The Boyesen Racing Reed optimizes intake flow dynamics across your entire powerband, translating laboratory-proven performance gains into real-world...617- SKU:
- 617
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- PRODUCT NAME:
- REED PETAL
- UNITS:
- SET
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
BOYESEN Racing Reed - Husqvarna 616
BOYESEN
$48.95A reed valve directly controls your two-stroke engine's intake timing and flow efficiency—get it wrong, and you're leaving horsepower on the table. The BOYESEN Racing Reed for Husqvarna 616 uses proven dual-stage design to maximize flow velocity across...616- SKU:
- 616
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- SET
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- MODEL:
- POWER REED
- TYPE:
- DUAL STAGE
- PRODUCT NAME:
- REED PETAL
- RIDING STYLE:
- OFF-ROAD
$48.95 -
BOYESEN Racing Reeds - Kawasaki Tecate 615
BOYESEN
$48.95Stock reeds limit your Tecate 615's potential across the entire RPM band, leaving power on the table from idle through wide-open throttle. Boyesen's dual-stage reed design increases flow velocity at every operating pressure, translating to sharper...615- SKU:
- 615
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- REED PETAL
- RIDING STYLE:
- ATV
- UNITS:
- SET
- BASE COLOR:
- YELLOW
- MATERIAL:
- FIBERGLASS
- TYPE:
- DUAL STAGE
- MODEL:
- POWER REED
- RIDING STYLE:
- OFF-ROAD
$48.95 -
BOYESEN Racing Reed - Suzuki 614
BOYESEN
$28.95The Boyesen Racing Reed transforms your Suzuki 614's intake efficiency by optimizing flow dynamics across the entire RPM range. Laboratory-validated dual-stage reed design delivers measurably higher flow velocity at all operating pressures, translating...614- SKU:
- 614
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BASE COLOR:
- YELLOW
- PRODUCT NAME:
- REED PETAL
- TYPE:
- DUAL STAGE
- MATERIAL:
- FIBERGLASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- UNITS:
- SET
- MODEL:
- POWER REED
$28.95Qty in Cart: 0Quantity:Price:$28.95Subtotal:
