well im new to this site and i was wondering if anyone could help me identify this motorcycle , i bought it dirt cheap and im sort of sure that its a 250, but i have no idea , i might be wrong , also the listing said it was a 1975 i was wondering if anyone could hep me with the year of this model and engine size , is it 2 stroke? and will it require mix , it started on just gasoline but im just trying to make sure. another thing is that once i turn it on and put it into gear it turns off it will jerk forward then shut off , what can it be? i was told it was in storage for quite a few years , maybe the plates are stuck together?