Fast idle in warmer temps

[Will14]

Reckon Hooli might have a good idea, clutch switch.Easy to check, sit with bike in 1st gear, as you slightly pull in or let clutch lever out slowly, you can hear/tell different mode kick in, at least can on mine.

Thanks @grog i'm presuming that you mean with the bike running from cold?

[Hooli]

No need to remove it, just measure the resistance at the connector up by the airbox.

I'm pretty sure there's a measurement for 20c in the workshop manual so that's close to know if it's giving a reasonable figure.

[Will14]

No need to remove it, just measure the resistance at the connector up by the airbox.

I'm pretty sure there's a measurement for 20c in the workshop manual so that's close to know if it's giving a reasonable figure.

Have just been reading the manual, there are a set of resistance readings from 20c up to 110c so will do as you suggest and take it from there, The thing is peeing me right off at the moment, worse of all I can ride around the problem by dropping a gear or two on hard acceleration but I see that as avoiding the issue and will always have it in my head that its not quite right 

Thanks again for your input, much appreciated

[grog]

Will, warmed up, just play with clutch lever, i can tell mine changes tune.

[KiwiCol]

and mine.   

When you're sitting at the lights waiting, (or in your driveway) with the clutch in (engine running of course) just let the clutch out a wee bit at a time, no revs, & you'll hear and see the revs increase as it changes maps, ready to ride off. Been ages since I even took notice of it, but reckon it's probably only 200 - 300rpm increase, but it's noticeable. 

My Black & my Blue both do it, so it's not colour dependant.  

[grog]

Pull the plug off clutch switch and have a ride, difference is amazing on mine. I once did as experiment.

[Will14]

So tonight's adventures, tested the resistance of the oil temp sensor, 63K Ohms with the engine cold, ran the bike for 10 mins and measured the resistance again and it was 17K Ohms so that seems to be OK

While I had the LHS panel off I cleaned the contacts on the remainder of the plugs that side, I then removed the headlight as there was a bit of a vibration rattle from something in there, found nothing obvious but while I was in there opened each plug and gave a decent dose of contact cleaner, all but one plug were like new, a minor bit of corrosion on the one but not enough to create any issues

Started the bike and no change to the running (as expected really) other than after idling for a minute or so she cut out and stopped altogether, no FI light showing and restarted straight away, maybe me being over liberal with the contact cleaner is what I have put that one down to 

So that's me running out of things to check and change, maybe take the injectors out tomorrow and get them tested/cleaned but did that a couple of years ago so not holding up too much hope with that

I also seem to have adopted a horrible metalic rattle at 2000rpm now, just to add more fuel to the fire! Sounds like top RHS of the engine but hard to pin point it, could be clutch area. Tried adjusting the idle to 2K revs so I could do some listening and finding but it stops after a few seconds so have to keep throttle on and off which I'm sure was pissing the neighbors off as much as me!

I think the time is fast approaching to throw her in against something else, this really annoys me as I love the bike & I seem to have grown a conscience and wouldn't want someone else to buy the bike and adopt the problems   

Pete...

[Will14]

Well I have removed the injectors and had them tested, cleaned and retested all OK, refitted them this afternoon and no change to the poor running

I have bought a set of used throttle bodies off ebay & was going to start removing the original ones this afternoon to fit them, but had a bit of a brainwave to compare the new set with the original set, low and behold the fast idle or cold start screw on the original set had been fully wound in, so although very crude I know but I counted the number of threads exposed on the new set and replicated this with the original set, started the bike & the cold start kicked in straight away, the revs then settled after 15/20 seconds and the bike appears to be idling much smoother than it ever has in my 5 years of owning the bike, will take it for a run tomorrow evening to see if this has cured the hesitation (had had a few beers by this time)

I may be on the correct path now at long last, although I am a bit skeptical as I tested the voltage for the cold start a couple of weeks ago and it was bang on, although turning the adjustment screw a full rotation in both directions had no effect which was a bit strange

Here's hoping the fault is fixed, at the turn of a screw in the end!     

[grog]

Will, what happened to your metallic rattle noise?

[Mick_J]

Good job, so you've now got a set of throttle bodies for sale. 

[Will14]

Will, what happened to your metallic rattle noise?

Still there at around 2000rpm and seems to disappear when the engine is warm, so thinking possibly valve clearances need checking again although they were OK when I checked last year or even cam chain rattle but not slack enough for the adjuster to move up a notch?

I started the bike from cold when I got home from work this evening, the cold start kicked in but the revs went up to 2500 rpm when first started then dropped to approx 1700 rpm, so wound the fast idle screw in half a turn & will see what happens tomorrow evening when starting from cold

I am just glad that this seems to be having some affect as nothing else that I have tried has made any difference, to the point where I think she will be staying now so has been cleaned and polished and brought back to her shiny best! 

Pete
 

[Will14]

Good job, so you've now got a set of throttle bodies for sale. 

Not just yet Mick but possibly in a while to try and recoup some of the money I have paid out trying to get her sorted!

Pete

[Andre]

or even cam chain rattle but not slack enough for the adjuster to move up a notch?

Adjuster contains a spring which may have lost its springiness over the years.