vacuum leak
#1
vacuum leak
hey guys i was reading through my new jet kit notes and it says something about if you rev the bike and it doesn't come back down to idle right away there could be a vacuum leak. my bike is doin this. has anyone else experienced this? is there a common spot to check first before i dive in? the motor does have over 50,000 on it but i was hopin it wouldn't need a major overhaul anytime soon. thanks for any help you guys can throw out there.
#6
#7
RE: vacuum leak
ORIGINAL: grwilson6
i dont think the throttle is sticking, it seems very quick to snap back into place. the rubber caps are all installed also. i wonder if the rubber intake boots the carbs attach too have gotten hard and crusty and are letting air past?
i dont think the throttle is sticking, it seems very quick to snap back into place. the rubber caps are all installed also. i wonder if the rubber intake boots the carbs attach too have gotten hard and crusty and are letting air past?
#9
RE: vacuum leak
To the OP, if the idle doesn't return to normal smooth idle quickly it's too rich. If it returns and then stumbles before resuming normal idle it's too lean. This only applies to the idle cuircit however. If the needles are bad or the jets are wrong that only effects off idle performance.