Throttle binding

[gordonv]

I removed my carbs, replaced, adjusted the throttle cables after looking at the Service Manual, seemed easy. Adjust the 2 cables so there is 2-6 mm of play on the throttle grip.

Seems that I have binding. Rotate the throttle, and it stays in position, it wont snap back.

I don't recall anyone posting issues with the throttle after replacing their carbs.

Any idea/suggestions of what to do?

[3W-lonerider]

if you put the  cables on the wrong side of the air tube going to the carb it will bind big time.. iv;e done it myself.
what happened was when i was re-installing the air box and shoving the tubes down to the carbs the cables got on the frame side of the tube instead of going between 2 tubes and up to the triple tree.

[Bighead]

Or call Bob aka attic rat

[gordonv]

Before removing the cables, I labeled one Left and the other Right.

I'm not positive I've routed them properly, but other than removing from the carb bank I don't recall doing anything else other than moving it out of the way so I could remove the whole carb bank.

I haven't placed the air box back in yet, so no air tube involved.

[bikerboy1951]

The cables have a round guide that they sit in after being reconnected to the carbs. If one of the cables is not situated correctly it will cause binding. It happened to me and took a little searching to figure it out.

Brad

[indybobm]

Did the carbs 'snap back' before you attached the cables?

[gordonv]

Did the carbs 'snap back' before you attached the cables?

Yes, prior to removing, the throttle behaved as it should have, snapping back easily.

The cables have a round guide that they sit in after being reconnected to the carbs. If one of the cables is not situated correctly it will cause binding. It happened to me and took a little searching to figure it out.

So you are saying the groove that the actual cable sits in. I should inspect that the cable is actually in the groove, and not outside of it, which would cause binding.

I'll need to get my glasses, maybe even the scope out, so I can actually see what I'm looking at.

Thanks, that will be a good start, has it been installed correctly.

Need would be to remove, inspect, and reinstall, maybe one cable at a time.

[indybobm]

Ok, you said prior to removing, the carbs snapped back. Did they snap back before you reinstalled them in the bike before you hooked up the cables?

[gordonv]

Ok, you said prior to removing, the carbs snapped back. Did they snap back before you reinstalled them in the bike before you hooked up the cables?

I'm going to say Yes. I only removed the carbs to do the o-rings and the desmog, giving me more room to work. More to do, so not putting the air box and tank back yet.

I did clean up the carbs a little, getting to areas that would have been impossible while installed, but I didn't taken them apart for rebuilding or anything like that.

[BINOVC]

Since you did not have this issue before dismantling, my 2-cents probably won't help, unless you altered your cable adjustment at some point during your procedure.
Does the throttle bind worse with handle bars turned to the right, and less when turned left?
This was my issue until recently I decided to figure out how to adjust them.
Your initial post says you adjusted both cables.  Pretty sure that you only adjust the "pull" cable, which is the inner one (closest to the engine).  The image in the service manual (page 3-5) shows this with an arrow pointing to it.  Larger adjustments made on the lower end, and finer adjustment at the handle bar end.
I had to adjust mine quite a bit looser, and ended up with no binding with the bars turned either left or right.

[gordonv]

The manual doesn't say much more than what you already posted.

Turning the throttle, you should have 2-6 mm of movement.

Fine adjustment at the handle bar, and major at the carbs.

But it doesn't say to move one over the other cable.

Handle bars have always been kept straight on. I haven't been back to see if the cables are in the grooves. I turn the throttle and let it go, and it stays there. Would be very dangerous if the bike was running.

I'm thinking after inspection, I'll removed the cables again, confirm everything moves freely. Then apply one cable at a time. I only removed them from the carbs, but didn't pay too much attention to them, as I thought the manual would tell me how to put them on and adjust them properly, but I feel it is greatly lacking in this area.

[indybobm]

Have you removed the cables from the carbs to see if the carbs snap back on their own?

[gordonv]

Nope. It's the reason I was going to remove the cables and inspect everything moves freely.

I was trying to start the bike after refitting the fairing, and when I turned the throttle it stuck.

The bike didn't turn over even. Just a single electrical relay click, and I thought the battery was fully charged, so on went the charger. No tank either, but I was hoping I had enough gas in the carbs to get it to run for 30 sec, so I know it's working.

[BINOVC]

"But it doesn't say to move one over the other cable."
...Yes it does, if you combine the instructions with the accompanying picture. 
It says "Loosen the locknut, turn the adjuster as required and retighten the locknut."  The picture next to this shows the adjuster and locknut, with arrows pointing at those parts on the inner ("pull") cable. 
The outer ("push") cable does not have a locknut above the bracket.  It does have one below the bracket, but that's just for tightening the cable to the bracket, and no provision for adjusting it.

[Paladin528]

Try loosening one of the cables slightly.  if they are too tight they will do this

[Wewaman]

just asking here 
do you have a throttle lock cruise control that might be locked ? 

[gordonv]

just asking here 
do you have a throttle lock cruise control that might be locked ? 

Yes to the lock, but I don't think it's on, I'd have to confirm that one. Good idea.

"But it doesn't say to move one over the other cable."
...Yes it does, if you combine the instructions with the accompanying picture. 
<snip>
It does have one below the bracket, but that's just for tightening the cable to the bracket, and no provision for adjusting it.

OK, so that one doesn't adjust. That nut is almost held in place and doesn't turn. The bracket holds it from turning, unlike the other cable.

[gordonv]

I spent 2 hours on this again today.

The cables where in their groove, seemed to be mounted correctly, just needed a little proper adjusting.

The throttle lock was NOT on.

Took the cable off again. Checked them to see how freely they moved, and they where fine. Checked the carbs again, they snap back and those springs are fairly strong, so I see no reason for them to be held back.

While they where loose, I took some "special" lube I had, silicon lube, lifted the cable and drop-by-drop sent some down the cables. I let it sit, worked the throttle/cables to insure it was spread along the cable. Let them hang again with a cloth under the end, and nothing came out.

I then re-attached the pull cable and tried the throttle. It's binding. Turn the wheel from side-to-side, nothing happens, throttle still on. I even left it sitting there for 1/2 hr and the throttle wouldn't return on it's own. I'm wondering if my throttle ever did???

Mounted the push cable. No change. I can use the throttle, but it doesn't return on it's own. I'm sure it's suppose to. The cable can't be binding, as it's where it was before removing.

I want to install a cruise control, and unless I can get the throttle to work properly, it would be unsafe to have the CC working.

[Beardo]

Mounted the push cable. No change. I can use the throttle, but it doesn't return on it's own. I'm sure it's suppose to. The cable can't be binding, as it's where it was before removing.

I want to install a cruise control, and unless I can get the throttle to work properly, it would be unsafe to have the CC working.

It appears you already have installed a cruise control. 

[Chrisj CMA]

Try, with everything else hooked up and ready to go...loosen the two screws holding the throttle switch housing.  Massage it around and see if the binding can be relieved.

[Jess from VA]

Is it possible it is not the cables, but something binding in the throttle sleeve and grip?

A cracked sleeve?

I don't know what grips you have (Kuryakyn?), but can you remove the end cap and look and lube?

[gordonv]

Try, with everything else hooked up and ready to go...loosen the two screws holding the throttle switch housing.  Massage it around and see if the binding can be relieved.

OK Jeff. I understand.

Maybe I should remove the throttle lock 1st, since I'm trying to add the CC. Would need to figure out how to do that too.

Is it possible it is not the cables, but something binding in the throttle sleeve and grip?

A cracked sleeve?

I don't know what grips you have (Kuryakyn?), but can you remove the end cap and look and lube?

I'm not sure of the brand, but I have heated grips. I see the power cable moves with the grip.

With the cables off, everything seems to move free enough, the grip, the cables (push/pull or moving the  grip), the carbs even.


I can only think that somehow after mounting to the carbs, the cables are bound, but the cables are routed the same way from after removing the air box.

[gordonv]

posted from my project build


Went back to the throttle cables, adjusted the pull cable nuts to loosen and make it easier to get the cable on. Instead of getting the pull one on also, and adjust them both, I tried out the throttle, and it snapped back. What the heck? Played with it some more, got the push cable on, tighten it up, and tried it again.

The throttle is working?? What the! OK, if I've figured this out properly, it seems that I had over adjusted the pull slack, and it was pulling the whole time.  I didn't do anything else, but loosen it right off. Needed to go back and adjust as per the manual. At least now the throttle snaps back like it should.


Now it's just a matter of getting the CC hooked up, and the air box back in. I hope I get the cables routed properly around the air box. Then play with it a little and get the bike running so I can test it out.

Thank you for your help, knowing that only one cable is adjustable and the other is stationary really helped in figuring what I did wrong. It was such a pain and could have brought my whole build to a stand still. It was frustrating having the bike somewhere other than home, and working on it once a week.

[Paladin528]

Generally a binding throttle can be attributed to improperly adjusted cable.  It does not take much to make it sticky.  Usually one or both are too tight