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 - 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 throttle response and mid-range acceleration. If you're...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 laboratory flow analysis to deliver measurably higher...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
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
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 velocity under all operating pressures, delivering measurable...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
$34.95 -
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 geometry that accelerates intake velocity across the entire...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
$39.95 -
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 superior flow velocity across your entire powerband,...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
$39.95 -
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 Boyesen's dual-stage reed design permits greater flow...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
$39.95 -
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 sharper throttle response and stronger acceleration from...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
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
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
$34.95 -
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
