Hi Not much goes wrong with those Honda's that an internet carburettor won't fix They get a lot of rust in the float bowl that clogs up the main jet You can clean them out but the rusty bowl will still be there I have had to use the gas welding tip cleaners to unclog the jet but that is not s good idea as it damages the jet slightly . They will usually go afterwards but might run unevenly Only expect to pay about $20 for the new carby Those carbys have a drain plug in the bowl .If we just undid that every once in a while and drain the water out we would have a lot less trouble. Jeff