DHB-Y | Yamaha Helix Bushing

Yamaha “R Series Helixes The “R (radius) Series helixes forYamaha from Dalton features a short duration initial angle, radiuses into what is mostly a Straight angle helix (second angle). This style of cut is a favourite of some Clutch tuning Professionals and is quite effective at controlling initial over-rev while still maintaining the characteristics of a Straight helix.