Idle screw issue

It seems no matter how far forward my idle screw is set, it's not making much contact with the idle arm (bar?) thus, my bike tends to die once I let off the throttle. I would think that the bar it makes contact with it set too far forward, but I'm not sure how this is possible, because then the bike would be on high idle all the time.

The spring is sound and I cleaned everything with WD40 so it's nicely lubed.

Anyone have any suggestions?

 

The bar it contacts should be part of the butterfly shaft so unless it got bent you should be able to make adjustments. how about a pic?

 

Maybe you have the wrong Idle Adjustment Rod for your Bike.

Mines got a Nylon Flat washer added between the Spring and Rod that makes the Rod easier to adjust.
I still have plenty of the threaded-end to contact the Platform on the Linkage to open and close the Butterflies.

 

Okay, here's another thought...

I just pulled my vacuum line off my petcock and there was a sizeable crack/tear where it meets the pet cock. Could this be causing fuel starvation issues, thus poor idle, thus poor acceleration?

I clipped off the damaged bit and re-attached and at least the bike is idling better... but still not great throttle response... perhaps this means another carb tune?

I don't have a washer on my idle adjustment screw, and there isn't one shown on the parts diagram... this must be an aftermarket thing, eh?

 

That could cause idle problems and other fuel issues - could be time for another tune. You still should be able to adjust your idle up and down with the screw though

 

Yay! The bike runs! Much better!

Time for a carb tune. I imagine as many times as I have pulled the carbs off the bike probably has contributed to the problem.

As far as the idle screw goes, it was stuck, which 'splains why I couldn't advance it. It's running better... but I'm still looking for that zip.

Thanks for the comments!

 

Very cool glad you got it

 

You can find two parts in "Well Stocked" Hardware Stores that will make adjusting the Idle Rod a whole lot easier than it is with the Stock arrangement.

Add a Small Nylon Flat Washer to the Rod before putting-on the Spring.
Smear the back-side of the Nylon Washer with Grease.

Next, add a Nylon Bushing SLEEVE to surround the Idle Rod Shaft just below the Thumb Wheel.
You can find one that will slip-over the Outside Diameter of the ROD ... and, Fit within the Inside Diameter of the Rubber Grommet.

This delightful little Mod makes adjusting the Idle EAZY ... even if you h ave to reach inn there to lower the Idle at a traffic light.
The Rod is easy to move.
It won't fight.

 

Thank You!!

I can't tell you how many times I have a) burned myself b) scraped a knuckle c) screamed in frustration because I can't adjust the idle at all because I have big man hands.

I've added this to my almighty Yama-tome. (Big book o yamaha stuff)