Lamella of valves competition BOYESEN motorcycle YAMAHA RD 350cc, 400cc, C / D / E / F / G and S from 1973 to 1980


Carbon fiber slats, ideal for equipping YAMAHA RD motorcycles from 1973.

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manufacturers : BOYESEN

59,74 € 59.74 tax incl.


Here are the famous valves BOYENSEN competition. These valves are made for the engine that equips the 350cc ET 400cc 4-stroke YAMAHA RD machines.


It will allow an increase of the power but also of the couple! This is a patented double-slat system, a thinner for low revs and a thicker one that goes into action (resonance) for high revs! The fiberglass that designs them is of very high quality! Ideal for equipping your machines unbridled and equipped.


Mounts on :


Yamaha RD 350
Yamaha RD 400
Yamaha RD 400 C / D
Yamaha RD 400 E / F / G
Yamaha RD 400 S

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