Stuck Idle Adjuster - '77 GS750

[twist-throttle]

Hello everyone, I'm new & this is my first post.

This spring, I bought a '77 GS750 for $75, it had been sitting in a co-workers garage for the last 15 years. Well I have been slowly bringing it back to life. Just in the last week now, I have finally ridden the bike... which I'm pretty pumped about.

But to my question. I can not move my idle-adjuster on the carbs. I have a '77 GS750... I didn't notice any kind of a lock nut on it. That big plastic white knob has spun off of the metal adjuster with the force I've put on it. So now I have used a large pliers & tried to turn the idle adjuster with that... all that has happened is that now the idle adjuster is starting to bend & it hasn't turned at all yet. I obviously need to be able to adjust the idle on the bike.

I have sprayed some rust penetrator on it, since it is rusty. But that hasn't worked yet either.

Any suggestions would be appreciated. I'm not very excited about finding somebody that knows how to weld, & have them weld something onto it that I can get some better leverage with. Oh, and yes the carbs are on the bike at this point.

Thanks

[chef1366]

Try PB Blaster and heat.

[twist-throttle]

Yea, PB Blast is what I did try. but no, I didn't put any heat on it.
So do you suggest a hair drier/heat gun, or my actual hand-held proprane torch?
Thanks.

[chef1366]

I don't think I'd use a torch with the carbs on the bike and fuel in the bowls. I'd take them off first.
If you already buggered the knob see if you can find some used carbs on Ebay.