Yamaha Parts Specialist

IT425 Boyesen Dual Stage Reed Valves
[RDV022]

IT425 Boyesen Dual Stage Reed Valves
£51.99 (Inc. VAT)
£43.33 (Ex. VAT)

Boyesen's patented dual-stage design incorporates a specially shaped top reed and a ported bottom reed. The top reed is lightweight and resilient for crisp throttle response at partial throttle or low RPMs. The stiffer, bottom reed is ported to provide maximum flow and horsepower at higher RPMs.

The Benefits:

  • Quicker acceleration for that all-important holeshot
  • Crisper throttle response for fast corner exits and surer jumps
  • More horsepower throughout the powerband for guaranteed performance
  • Improved engine efficiency and fuel economy for the long distance rider
  • Longer life - Boyesen Power Reeds outlast all other aftermarket reeds

Supplied as a complete engine set to suit:

IT425 1980

Replaces Yamaha part numbers
OEM Part number: 3R5-13613-00
OEM Part number: 2K7-13613-00
All part numbers are used for reference purposes only and no source of manufacture or supply is implied.