Honda ST1300 Section > Ask A Tech about your Honda ST1300

2004 st13 cold start idle very fast 2500 rpm, then rough idle

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Steve Epps:
Hello members, I have had this problem for a while and it continues even after having the bike serviced. Some times worse than others, has anyone else had a problem like this and what do you think it is? I have Delkavic mufflers and a K&N filter. Even after the bike is warm it will sometimes get a rough idle at the lights and almost stalls. Any ideas will be appreciated, regards Steve

Brock:
Do you have the foan outer filter fitted?? There are reports that the foam causes problems..

Neale:
Sounds like it can't breath.

saaz:
I have a vague idea that the idle wax module may be defective, so it is not getting the right signal that the bike is warm. Also, there are some vacuum tubes that go to the throttle bodies that can clog up over time and lead to idle problems.  The throttle bodies can also be synchronised.  I am not at home at the moment so can't check my normal information. I am sure some ST13 owners might have come across this.

Steve Epps:
Thanks for the info guys, I'll pull the tank off and have a poke around!
Steve

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