idle sometimes at 2500 revs

[branners]

After driving for about 8 miles in stop start traffic my idle speed sticks at 2500 revs. Sometimes a couple of quick throttle pulls will will bring the idle back to normal. Anyone know what this could be?

[Treadtrader]

Either the cables are in need of some lube or time to buy new ones.

The linkage is fairly reliable.

Or is the throttle tube sticking on bar ends?

[StumpyFingers]

Lack of lubrication on the throttle cables.

[angelo]

Your choke is sticking - check front one first - easy to get at. Mine did exactly the same - look for sticking choke threads

[Warthog]

Badly adjusted idle screw, cables, or air leak.

[jonnybgood]

I d guess if its not the throttle sticking then it'll be the choke - had similar problems on mine - just wouldnt tick over at constant revs. Ended up blanking of the choke in question. I also got poor fuel consuption and the throttle response just wasnt as good as it should have been.

And before anyone asks im not related to warthog altho some people might say there is an uncanny resemblance

[Warthog]

And before anyone asks im not related to warthog altho some people might say there is an uncanny resemblance

You mean you're not my better looking cousin?!?

I feel so alone! SO ALONE!!!

[BobA]

Remember there are TWO throttle cables, a push one, and a pull one, one or both could be seizing, so get them lubed.

Have you dropped the bike recently? Is the bar end on the throttle side pushed in and fouling the throttle twist?

Yes, it could be the choke cables (there are 3 linked together in the splitter) or the choke plunger getting stuck.





Bob

[branners]

Hi,

Thanks for all the replies. I had new throttle and choke cables installed but still same problem. Cables don't seem to be sticking cause if I back the idle screw off a little when at the high revs it will adjust the revs down. Any chance it could be carburettor slide sticking or ecu problem?

[BobA]

Hmmmmm

I wouldn't suspect the ECU initially, I'd look at simpler options.

It could be a carb slide, but I'm not so sure. If one got stuck, it would idle like an old tractor and probably stall, and I can't imagine both getting stuck!

I'm assuming you have now eliminated the cables, but is the routing of them OK? If the throttle or choke cables snag or twist the wrong way, this could cause similar problems. The choke cable is such a common problem with AT's I'd be tempted to re-check that.

Failing that, check the carb linkage is not fouling or has something in it. You'll probably need to have the airbox off to check this.

Whilst you're there, check the rubber bellmouths that connect the carbs to the airbox. These can come adrift and cause running problems, and they are particularly prone to coming off if the jubilee clips on them are overtightened.


Good Luck


Bob