23-07-16, 06:27 PM
Most old fazers have got cracked rubbers on the carbs - but these are much thicker than you think. Anyhow, one way to tell if the crack goes all the way through is to spray a little wd40 on the crack. If it gets sucked in then you have a leak, if it runs off (as it most often does with cracked rubbers) then you're fine; it's just surface cracking.