clutch affecting idle/rpm?? - 600RR.net
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post #1 of 26 (permalink) Old 05-19-2011, 11:30 PM Thread Starter
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clutch affecting idle/rpm??

I'm in need some help here...I'm stumped.

I recently replaced my throttle cables on my '08 and since then my bike's been running really weird. First it idled really high, so I adjusted them and it seemed to get a lot better. Now the adjustment seems good (good throttle response and cable slack) but the idle is a little high (2000-2500rpm). The strange thing is that when I use the clutch the rpms go up and down. With the clutch all the way out it's ok (a little higher than normal, but ok) and with the clutch all the way in (and the bike in gear) it's at like 3500 rpm.

Any ideas? Much appreciated!
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post #2 of 26 (permalink) Old 05-20-2011, 10:24 PM Thread Starter
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No one's got any ideas?
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post #3 of 26 (permalink) Old 05-20-2011, 10:26 PM
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Not sure if the 07+ has it but my 06 has a idle speed adjustment knob. Maybe you can adjust it if you have one?
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post #4 of 26 (permalink) Old 05-20-2011, 10:31 PM
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I don't know too much so anybody correct me if I'm wrong but the rpms adjust themselves to keep the bike from stalling out when using clutch only.

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post #5 of 26 (permalink) Old 05-20-2011, 10:31 PM Thread Starter
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I looked for one but couldn't find it....I don't think mine has one
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post #6 of 26 (permalink) Old 05-20-2011, 10:50 PM
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07 and newer dont have the idle adjustment screws. I looked for mine forever on my 07 and learned they dont have them, the idle is controlled by the Computer. You MAY have a pin hole in a vacuum line somewhere, I know it has nothing to do with your throttle cables but that was my issue, I had a tiny hole in a vacuum line and it was causing the idle to be all screwy.
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post #7 of 26 (permalink) Old 05-21-2011, 03:40 AM
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The clutch is supposed to affect the idle, the clutch switch is connected to the ecu...

So do you mean with the clutch handle all the way out, and the drive engaged its a little high but when you squeeze the clutch handle in, disengaging the drive the rpm goes through the roof?

Can you start the bike with it in gear, the side stand up and the clutch pulled in?
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post #8 of 26 (permalink) Old 06-07-2011, 12:06 PM Thread Starter
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Quote:
Originally Posted by Nico View Post
The clutch is supposed to affect the idle, the clutch switch is connected to the ecu...

So do you mean with the clutch handle all the way out, and the drive engaged its a little high but when you squeeze the clutch handle in, disengaging the drive the rpm goes through the roof?

Can you start the bike with it in gear, the side stand up and the clutch pulled in?
Sorry, it's been awhile, but I'm still having this issue.

I need to put together a detailed list of what happens and when, but basically it's this:
-bike idles higher than normal (2000-2500rpm)
-pull in clutch (no change in idle)
-engage first (no change in idle)
-slowly let out clutch, and at about 50% engagement the idle jumps ~1000rpm and makes the bike want to jump or wheelie
-with clutch all the way out, the idle is still higher than normal, but it is smooth
-when riding normally everything is fine, but the idle will never go below 2000rpm (i think normal idle is around 1500)


I haven't tried starting it in gear with the stand up, why do you ask?
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post #9 of 26 (permalink) Old 06-07-2011, 12:09 PM
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Quote:
Originally Posted by nick5446 View Post
Sorry, it's been awhile, but I'm still having this issue.

I need to put together a detailed list of what happens and when, but basically it's this:
-bike idles higher than normal (2000-2500rpm)
-pull in clutch (no change in idle)
-engage first (no change in idle)
-slowly let out clutch, and at about 50% engagement the idle jumps ~1000rpm and makes the bike want to jump or wheelie
-with clutch all the way out, the idle is still higher than normal, but it is smooth
-when riding normally everything is fine, but the idle will never go below 2000rpm (i think normal idle is around 1500)


I haven't tried starting it in gear with the stand up, why do you ask?
what year is your bike.
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post #10 of 26 (permalink) Old 06-07-2011, 12:12 PM Thread Starter
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Quote:
Originally Posted by tenjin View Post
what year is your bike.
this can make a difference in what the problem may or may not be.
'08


ten characters
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post #11 of 26 (permalink) Old 06-08-2011, 06:03 AM
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It just sounds like your clutch switch needs adjusting, it should be coming on a lot later when your letting the clutch back out... about 80% of the way through its travel.
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post #12 of 26 (permalink) Old 06-08-2011, 12:45 PM Thread Starter
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Quote:
Originally Posted by Nico View Post
It just sounds like your clutch switch needs adjusting, it should be coming on a lot later when your letting the clutch back out... about 80% of the way through its travel.
Any idea how to do that? Also, any idea how it would have gotten messed up?
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post #13 of 26 (permalink) Old 06-08-2011, 01:17 PM Thread Starter
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Quote:
Originally Posted by Nico View Post
It just sounds like your clutch switch needs adjusting, it should be coming on a lot later when your letting the clutch back out... about 80% of the way through its travel.
Any idea how to do that? Also, any idea how it would have gotten messed up?
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post #14 of 26 (permalink) Old 06-09-2011, 08:13 AM
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It just screws on to the underside of the clutch lever...

Just had a look at it and it can't be adjusted but it may be broken...

The switch has a big pin coming out, it should be around 3/4" to 1" long... you need to pull the clutch in almost all the way before the handle stops making contact with it.

Or you can you pull the clutch in and take a photo of the underside of the handle at the pivot and post it up...
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post #15 of 26 (permalink) Old 06-09-2011, 08:15 PM Thread Starter
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Quote:
Originally Posted by Nico View Post
It just screws on to the underside of the clutch lever...

Just had a look at it and it can't be adjusted but it may be broken...

The switch has a big pin coming out, it should be around 3/4" to 1" long... you need to pull the clutch in almost all the way before the handle stops making contact with it.

Or you can you pull the clutch in and take a photo of the underside of the handle at the pivot and post it up...
Yeah I know what you mean now; the switch is intact and functional (checked it with a multi-meter).

Also, for what it's worth, it seems to come and go. For instance when I rode home yesterday it was doing it about half as bad (as it is capable of) when I left work, really bad when I got most of the way home, and in my neighborhood it was barely noticeable.

I wish there were a check engine or FI light on to make this easier....
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post #16 of 26 (permalink) Old 06-13-2011, 04:44 PM Thread Starter
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bump...any last minute suggestions before i bring her in??
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post #17 of 26 (permalink) Old 06-14-2011, 01:45 PM Thread Starter
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For what it's worth, I was playing around with Nico's suggestion of starting it while in gear and it's given me some more data...

-When it's idling high (which now seems intermittent) I can shut it off at a stop light and restart it (in gear) and it's fine for the rest of the ride. When I shut it off and restart it (in neutral) it still seems fine. However, when I park it for the night and start it up in the morning (in neutral or gear) it idles high again.
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post #18 of 26 (permalink) Old 06-15-2011, 10:05 AM
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That is a bit of a strange one... it sounds like the ecu isn't reading the temp after startup...

The only thing I could suggest looking at for that is the ecu, so probably worth taking it in to a shop to have looked at before you go spending that kind of money on something that may not fix your problem.
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post #19 of 26 (permalink) Old 06-15-2011, 04:11 PM Thread Starter
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The more I think about it, the more I'm starting to think it's just a high idle; is there a way to adjust the idle on an '08?
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post #20 of 26 (permalink) Old 06-16-2011, 03:50 AM
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Black knob on the left hand side, just below the seat.
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post #21 of 26 (permalink) Old 06-16-2011, 02:11 PM Thread Starter
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Originally Posted by Nico View Post
Black knob on the left hand side, just below the seat.
Pretty sure my gen is without an idle adjustment screw, but I'll look again
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post #22 of 26 (permalink) Old 06-17-2011, 01:29 AM
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Pretty sure my gen is without an idle adjustment screw, but I'll look again
You would be right there... sorry mate.

If your ldle is off you need to look at the IACV or look for an vacuum leak at the intake.
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post #23 of 26 (permalink) Old 06-18-2011, 08:05 PM Thread Starter
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Hey Nico,

Thanks for pointing me towards the IACV. I ordered one through Honda ($120 ) and when I pulled mine out I found a tiny pebble lodged in one of the ports!! Pulled it out, re-installed (with fingers crossed) and the bike is back to running great!

Check out the pic (sorry for the crappy quality).

Thanks again!
Nick
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post #24 of 26 (permalink) Old 06-19-2011, 10:24 AM
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Good to see you have her up and running again mate!
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post #25 of 26 (permalink) Old 06-15-2012, 12:22 AM
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were is the iac located?
Quote:
Originally Posted by nick5446 View Post
Hey Nico,

Thanks for pointing me towards the IACV. I ordered one through Honda ($120 ) and when I pulled mine out I found a tiny pebble lodged in one of the ports!! Pulled it out, re-installed (with fingers crossed) and the bike is back to running great!

Check out the pic (sorry for the crappy quality).

Thanks again!
Nick

Id rather sweat then blead
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post #26 of 26 (permalink) Old 06-16-2012, 11:08 PM
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ok i think i fixed my problem, i reconnnected the clutch switch

Id rather sweat then blead
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