Idle Speed screw not moving

[drewpleblanc]

So, i sort of included this in another post of mine but i would like to get an opinion on it:

My Idle adjustment knob doesn't really turn at all - it just snaps back to it's original position like a rubber band! I bought the bike used a year ago - and this has never been an issue or anything; but i am about to take my carbs apart and clean them so i'll be able to get to this part quite easily and possibly find out what the issue is.

I also noticed that there in the line of the knob it's a little stripped as if the previous owner had used a screwdriver to turn it at some point or something? What could this be? Why would it be stuck?

Thanks for all of your thoughts and insight!

[TRPUT]

They rust - and eventually snap - if not lubed regularly. It has a phillips screw centre for people with short, fat fingers. You will get to it when you pull the carbs, so check if some lube frees it up - replace otherwise.

[MEngineer]

Rusted or gunked up. If you can spray some penetrant in there or get in there and clean it up it should work fine.

[drewpleblanc]

Cool, glad to know this should be a relatively easy fix. I figured, after watching Carbs 102 that it should be sorta easy to get to - but it's always nice to hear a second opinion!

Thanks Ya'll!

[jondoe]

Having exact same problem, so hard to reach the stupid screw. Complete noob, is penetrant same thing as penetrating fluid? Can I just spray it on the knob without having to take apart anything? I'm assuming I can find that at any auto shop?

Since that thing is stuck, should I be checking anything else that probably wasn't maintained, currently bike is idling really low within first hour of startup, like 500 - 750 rpm, but after that will idle at 1200, figured was screw issue, but couldn't get the stupid thing to budge, hopefully that will solve idle problem.

[skjeflo]

If the bike is new to you I'd take the time to lube everything that could possibly need it. Cables, chain, pivots, etc., just work your way through the manual. Who knows what the previous owner did or didn't do.

Might save you from a session of on the side of the raod.

[firefighter313]

Id lube it up real good..if still having the same issue the just replace it..for the price of a new one its not worth trying to get under the jacket n get all the old dirt n stuff outta it

[Kreylyn]

The most common reason the idle adjuster won't move, is hard to move, or snaps back into position after trying to move it... is because the rubber cover on the adjuster has hardned in a U curve shape.

Cut it off... and it will work again. You can replace it with something simple like an electrical shrink wrap if you want, but I generally just use them without it.

Krey

[jondoe]

The most common reason the idle adjuster won't move, is hard to move, or snaps back into position after trying to move it... is because the rubber cover on the adjuster has hardned in a U curve shape.

Cut it off... and it will work again. You can replace it with something simple like an electrical shrink wrap if you want, but I generally just use them without it.

Krey

Where is that rubber located? Not something you can see when looking directly at the screw?

[firefighter313]

You dont see the rubber coating when u look at the cable? U know all the black rubbery substance that covers the cable which turns the screw in turn opening the butterfly valve letting more air in and raising the idle rpms?

[Kreylyn]

See the rubber sheath on the cable at the bottom? That's what I'm talking about.

Alternatively, you could purchase a new cable if you wanted.

Krey

[stevefin78]

See the rubber sheath on the cable at the bottom? That's what I'm talking about.

Alternatively, you could purchase a new cable if you wanted.

Krey

krey any idea as to where my mate can buy a idle speed adjuster cable? Ive looked everywhere online here in the uk and cant find one at all ! i even switched my ebay app on my phone to america and nothing
steve

[Kreylyn]

What year model?


Pre should be part number 13279-20C00, post should be 13267-19E00. Any OEM parts dealer should be able to get that for you.


Krey

[Engelskmannen]

Try "http://www.robinsonsfoundry.co.uk" they can get anything that is still available and have masses of parts on the shelf

Good luck, Colin.

[stevefin78]

Thanks chaps !