IT'S A COOPER ENDURO BIKE WITH THE OPTIONAL REAR SWING/SHOCK MOD BLAIR HARLY DID ON THE COOPERS HE SOLD, BIT OF SHITTER, FITTED WITH A SHITTY PIPE FREAKY, THE ENGINE NUMBER SHOULD MATCH THE FRAME NUMBER, ENGINE NUMBER SHOULD HAVE A HORSES HEAD EITHER SIDE OF IT, FRAME NUMBER SHOULD START WITH SA-MO OR UX xxxxx, THE TANK IS FIBREGLASS, WORTH MAYBE $250, HALF THE PARTS ARE MISSING, IT SHOULD LOOK LIKE THE PHOTO OF MY BIKE ON THIS POST.