mine was a clean Blown up motor .. 1972 honda 600an witch i bought a core block from a wrecking yard and rebuilt it in my bedroom at the age of 14 keeped it tell i was 17 and ran the shit out of it with its mighty 64hp..
for a car that only weighted in at 980lbs with a full tank.. it was pretty quick... only had to buy a new set of tires for it ...