hello all. i have a 77 xs360 with some carb troubles. i had some trouble with the bike revving really high and not coming back down to idle. so i just soaked the carbs over night in pine sol solution. it worked amazingly! they are pristine! but still having problems, although its better, with the bike not coming back down to idle. my thinking is one of the butterflies is staying open just enough to let more air in than the other. the throttle cable returns nicely, i lubed the cable really well.
if i rev the bike up to 3000 rpm it stays there and i have to kill the bike. i thought it may be a sticking slider but they both seem to return just fine. the only other thing i that will bring it back down is if i ever so slightly turn the linkage that extends from the outer portion of the carb. its really more of a bump...it is the portion that contains the spring. the linkage is very clean and i thought soaking everything would do the trick but unfortunately it did not. if i loosen the nut on the end of the linkage the bike comes down but very slow.
so all in all, this is why my thinking is leading towards one of the butterflies being slightly off. there has to be excess air getting in there somewhere? can anyone confirm im not crazy? thanks!