I just pickup a MC18 with the MC18 VIN numbers stamped on the steering neck of the frame. After futher inspection, I notice the frame is identical to my MC21 frame..thicker frame, larger mounts to the subframe and a Gull swingarm,17 inch wheels??? I figure someone added the swingarm,wheels and plastics..Did Honda use MC21 style frames on their last production of their MC18's????