Hi everyone, just bought my first Bridgestone, after 15 years of looking , it's a 1968 175 with high pipes but don't know if it's a HS , can't see an I.d. plate , it doesn't have a sump guard fitted , how can I tell which model without the plate. It's in very good condition for its age but the guy hasn't started it for 15 years!!. Any advice would be appreciated, regards Steve.