Model : Yamaha R5, R5A, R5B,DS6, YR1, RD125 Twin, RD200, RD250 - RD350 / RD250 - RD350A / RD250 - RD350B. We understand that this fuel cock assy though new, is from the 1970's. As such, we have decided to provide you with a free NOS, Original Yamaha, fuel cock repair kit so you can replace all the older rubber seals.