hi m8 I have just got mine out today after being parked up for 4 month and mine wouldn't start so I stripped the carb down and the petrol stunk and was like a dark yellow abit like piss tbh lol give it a good spray of carb cleaner give the petrol tank a good shake and it was sweet started 3rd kick
if its been stood and not shaken about then yeah change it out I have had fuel in for much longer but always give the tank a shake every over week along with turn fuel on and off to stop it turning to varnish in the carb ...
with a rebult engine its realy worth tasking no chances
