F1 c40 error code

[robby]

Hi all
My bike is a k7 twin spark 650 model.

I have the f1 warning light coming up showing C 40 which is the ISC,idle speed control valve.

When the bike has been stood for a few days without been started the bike starts and runs rough I turn the engine off after a minute and back on and the problem has dissapeared and I can go out for the day on it without further problems.

I would be grateful for your ideas and thoughts, could it be the plugs need changing? they haven't been done for a long time maybe 18,000 m !

Also can someone tell me if I need four of the same spark plugs or are the top ones different to the bottom ones?

Kev

[greywolf]

It's definitely not the plugs. They are good for well over 20,000 miles anyway. A C40 only involves the ISC valve. It may be sticking or needing a reset. Here is the reset procedure.

1) Turn the ignition switch to the OFF position.
2) Remove the seat.
3) Put the bike in dealer mode. http://www.vstrom.info/Smf/index.php/topic,7061.0.html
4) Turn the ignition switch to the ON position.
5) Turn the ignition switch to the OFF position.
6) Then, wait more than 5 seconds.
The ISC valve automatically is set at the PRE-SET position.
7) Take the bike out of dealer mode.

[robby]

Greywolf your a star thankyou very much  I shall try that later tonight when I finish work

[robby]

so after re-setting it a few times it now won't re-set and I can't clear the F1 code ! any suggestions on what to do next ? any advice muchly appreciated.
kev

[greywolf]

A reset only clears the code if it was there due to the idle speed being off. If there is a problem with the ISC valve itself or the connections to it, that needs to be fixed.

[robby]

Is the isc something that's servicable at home,could it just need cleaning ? A friend of mine said it could be the throttle butterflys getting stuck what's your thoughts on that ?

[greywolf]

Stuck butterflies would stick the throttle. I do not know of anyone fixing an ISC valve, or even of any being replaced.