These Rapid Art custom made clip ons are manufactured from 304 stainless steel are Tig welded then finished with a high polish. They are a must for setting your 390 up for a great racing position combined with out race rearsets. The standard throttle and clutch cables can be retained . However the steering stops need to be modified by at leas 3mm on each side to reduce the steering lock to fit them in . Replacement bars sold separately. More pictures available on request.