The Honda - Kawasaki Power Reed Set by Boyesen features two rectangular yellow dual-stage reeds with metal strips and three holes each, side by side on a white background, engineered for higher performance and optimized flow velocity.
The Honda - Kawasaki Power Reed Set by Boyesen features two rectangular yellow dual-stage reeds with metal strips and three holes each, side by side on a white background, engineered for higher performance and optimized flow velocity.
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Boyesen 633 Dual-Stage Power Reeds – 633-BOY

$39.95 USD
Normally ships in 2-3 business days

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SKU: 633-BOY

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SKU: 633-BOY

Tired, chipped stock reeds flutter, leak and cost you bottom-end snap. The Boyesen 633 Dual-Stage Power Reeds uses a dual-stage design to move more air and fuel through the entire throttle range.

Boyesen is known for reed valves, cooling and engine parts for dirt bikes and ATVs. Shop more in our UTV & ATV Engine Rebuild Kits collection.

Why Choose the Boyesen 633 Dual-Stage Power Reeds

Key Features

  • Dual-stage reed design: a thin top reed and a stiffer, ported bottom reed
  • Lab flow testing shows better flow than standard reeds
  • More flow velocity across all operating pressures
  • Stronger response from start-up to top-end acceleration

Great For

  • Sharper throttle response
  • Replacing chipped or tired reeds
  • Two-stroke race and trail builds

Specifications

  • Brand: Boyesen
  • Part number: 633-BOY
  • Type: Dual-stage power reeds
  • Use: Two-stroke reed valve

Fitment

Convermax lists the Suzuki LT-F KingQuad 300 4x4 (1998–2001), which is a four-stroke with no reed valve. The title says Honda and Kawasaki, and other retailers list part 633 for Honda, Husqvarna and Kawasaki two-strokes. Verify before ordering.

Always confirm your exact model and year before ordering. Contact us if you’re not sure.

Which Boyesen Reed Is Right for You?

  • Super Stock Fiber: Budget-friendly, OEM-matched, longer-lasting stock replacement.
  • Super Stock Carbon: OEM-matched carbon reeds for longer life and better response.
  • Power Reeds: Dual-stage design for more flow and power across the RPM range.
  • Pro Series Carbon: Carbon fiber dual-stage reeds for the quickest response.
  • RAD Valve: A complete reed cage upgrade that improves intake flow and distribution.

How to Install

  1. Remove the carburetor and intake boot to reach the reed cage.
  2. Unbolt the reed cage and remove the old petals and stop (keep any parts the instructions say to reuse).
  3. Fit the new reeds with the correct side facing the cage; snug the screws evenly with thread locker.
  4. Check that the petals sit flat with no gap, then reinstall with a new gasket.
  5. Read your plug after the first ride and adjust jetting if needed.

Follow your service manual for torque specs. If you’re not comfortable with engine work, have a qualified tech install it.

Care Tips

  • Inspect reeds at each top-end service for chips or gaps.
  • Keep your air filter clean; dirt destroys reeds.
  • Replace petals at the first sign of chipping.

Related Boyesen Products

Shop More

Helpful Guides From the Witchdoctors Blog

Frequently Asked Questions

Do I need to re-jet?

Usually not for a reed swap, but read your plug after the first ride.

Is this for four-stroke engines?

No. Reed valves are used on two-stroke engines.

Can I return it?

Unused items in original packaging can usually be returned. Contact our customer service team, and we’ll help.

Where to Ride

Feel the difference at one of these riding areas:

Order the Boyesen 633 Dual-Stage Power Reeds Today

Get more out of every ride. Add it to your cart, and Witchdoctors will get it moving. Questions about fitment? Contact our team, and we’ll help.

General Safety Warning & Installation Requirements

Your safety is our top priority. Whether you are maintaining a Victory® or Indian® Motorcycle, or servicing a UTV, ATV, or Side-by-Side, proper installation is vital to the performance and safety of your vehicle.

Important:
Warning: Failure to follow manufacturer-specified installation procedures and safety requirements can result in mechanical failure, loss of vehicle control, serious injury, or death.

Important Fitment Disclosure

At Witchdoctors, we want to ensure you get back on the road or trail as quickly as possible. Correct fitment is the most critical step in purchasing parts for your Victory® or Indian® Motorcycle. Also for your Polaris®, CFMoto®, Arctic Cat®, Yamaha®, Honda®, Can-Am®, Kawasaki® UTV and ATV.

Verification Required: While we strive for 100% accuracy, vehicle manufacturers often make mid-year production changes. Always verify your specific year, make, and model before finalizing your order.
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Shipping

Qualifying Retail orders $159.99 or more will receive free ground shipping. Free Shipping Terms and conditions.

All orders over $500 will require a signature.

Please see International Shipping page for orders shipping outside the US.

See our full Shipping Policy page for further details.

Product Availability

We show real time product availability. These products normally ship the same business day but may ship from one of our warehouses across the country. If an item requires additional processing time you will be notified.

Returns

If your order arrives and it is not right, we will we'll fix it. We promise!

Doesn't fit or just not happy with it? You can return any new, unopened, unused or unaltered item within 30 days of delivery receipt of your item. We will issue a refund to your original payment method.

See our full Return Policy for all of the pertinent details.

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