Ok i brought home my late fathers motorcycle he had stored in an abandoned house of his that was robbed. they stole (what i know of at a glance) the gas tank, head light, and seat. I dont know much about motorcycles especially this one. Now all I know is that it was made 9/1980 and the engine says 2500cm3, with the number ' 4H7108046 ' on it. Also on the right side it says G50. I tried a google search but no luck. Any one have a clue of what model this is and any other info? any help will be appreciated Thanks