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Non-Rotating Throttle

  • Thread starter Thread starter ScrumDown
  • Start date Start date
S

ScrumDown

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I cleaned and replaced all rings on the carbs and boots. When I put them back on the bike, (I'll tell you a trick I learn to make it super easy to do), the throttle only moves a quarter (1/4) of it total rotation.

What would be the cause of this?

W/O being connected to the carbs the throttle twists/rotates correctly. I am thinking that the "throttle pulley assembly" (do not know the exact technical term) on top of the 3rd & 4th carb needs to checked over for anything gumming it up. OR I just need to put a little lubrication on it to get things loose again.


 
have you had the carbs stripped and rebuilt back up again?
sounds like you have refitted part of the throttle linkage incorrectly....
 
TRICK -- My first try to get the carbs back into the boots & connect them to the engine failed miserably. I'd get one side in & then when trying to get the other, the "in" one would popped out. UGH! Tried- angling from the bottom to the top insert. NOPE! Tried angling from the top to the bottom insert. NOPE! Tried - once all were line up correctly using a 2x4 to pull evenly. NOPE! Every trick I could think of trying failed.
So, off to the web to see what others had done. Now in my search there were bunches about removing carbs; nothing specific about reattaching. The closest I found; (on a completely different make & model of bike); one guy said, to put Marvel Mystery Oil (MMO) liberally on bunch on a rag and wipes the inside & outside of the boots with it. I did this and I let mine sit overnight. The next day when I tried to put the carbs back in, BAM! They slide back on with minimal exertion.

My boots were not super hard or brittle. If yours are you may want to replace them. Putting the MMO on the boots seems to have allowed mine to be just a bit more malleable & provided enough of a slick surface to let the carbs slide back on.

If you all think this is a good enough trick that it should be posted in the Tips & Tricks section, let me know.
 
Agemax said:
have you had the carbs stripped and rebuilt back up again?
sounds like you have refitted part of the throttle linkage incorrectly....
Click to expand...

That's the way I am leaning. If later today is supposed to be as yucky as they say, then I remove & look them over. I was just hoping to not have to do this.

The easy "hopes" with getting an old bike running again, seem to be squashed rather often! :D
 
take the carbs off the bike and manually open the throttle linkage (where the cables attaches) see if you can see anything physically stopping the mechanism from opening fully
 
Gotta play with the kid while weather is still nice enough. I'll let you all know later tonight what I find out.
 
Scrum....I dont like oily stuff on my boots, so what I do is this.

Bike on center stand.

Bungee wrapped around the brake lever to hold the front brakes.

Just wet the throats of the carbs wet with some water. The water will soon evaporate from the area and allow the rubber to actually SEAL ( key word here is SEAL ) against the carb throats.

Be sure your band clamps are not stretched either..replace if the two flanges get within touching each other range when you tighten the screw.
 
Dave...slides cant go in 180 out...the linkage wont allow that to happen...and the slot that lines up with the dimple in the slide tower wont either.

CV carbs are a no brainer as long as you get the little rubber tab in the spot for it.
 
chuck hahn said:
Dave...slides cant go in 180 out...the linkage wont allow that to happen...and the slot that lines up with the dimple in the slide tower wont either.

CV carbs are a no brainer as long as you get the little rubber tab in the spot for it.
Click to expand...

They can on a Honda. Haven't had that problem with my Suzies however, I also have rebuilt a rack or seven.
 
I just asked a simple question Dave.

GS carbs have a witness slot and a dimple to align them in the towers so they CAN NOT go in wrong. The only way the linkage can be backwards is if the linkage is unscrewed from the top of the slide and reinstalled 180 out.

Even then, when you put a slide in with the linkage 180 out, you can bend it back to even get the throttle rod to pass thru..so yeah I do know what I am talking about from making that exact mistake once..so your right, theres no arguement because I AM right!!!!

And thus..he wouldnt have been able to EVEN REMOTELY reassemble the rack in any way.
 
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My theory is he has the throttle cables in the wrong spot and should swap them around. Simple mistake. I always twist the grip to see which one goes to the front and which goes to the back. That way I dont get them confused.

Yeah...I have done this one too. Only one is the puller. He is only getting that 1/4 turn because there is slop in the cables and once its taken up the grip stops.

He needs to swap the cables around and then adjust the slop out of the cables..especially the pulling side so he has a nice quick roll on at the grip.
 
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chuck hahn said:
My theory is he has the throttle cables in the wrong spot and should swap them around. Simple mistake. I always twist the grip to see which one goes to the front and which goes to the back. That way I dont get them confused.

Yeah...I have done this one too. Only one is the puller.
Click to expand...

Sounds favourite to me as well Chuck.
 
Hampshire..if the carbs are assembled and they work by moving the throttle linkage by hand , as he stated, then thats then only possible thing that could be wrong.
 
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chuck hahn said:
Hampshire..if the carbs are assembled and they work by moving the throttle linkage by hand , as he stated, then thats then only possible thing that could be wrong.
Click to expand...

Chuck, read the post correctly............

he states "W/O being connected to the carbs the throttle twists/rotates correctly. " which refers to the throttle tube,(not being connected to the carbs) not the throttle linkage itself
 
He did only mention the grip Adrain..youre right. I took for granted that when he reassembled them he did a functioning check to detect any problems before installing on the bike.

My apologies for assuming what should be the obvious.
 
I've been playing dad & housekeeper all day. So I have not been able to get out to check on this. That said ...

I do not believe I installed the cables backwards/wrong. I checked which is supposed to pull & which is supposed to push. Although my dyslexia has reared its head now again when moving from point Z through A. ;)

BUT ...

I think it is best of me to take the carbs out & check throttle linkage to make sure something has not come loose or was messed with. I have a wonderful neighbor who lets me store my bike in her garage. She has grandsons who visit occasionally. So I cannot guarantee that they did not do something, as curious kids do.

You all have provided me with excellent ideas and areas where to look for a resolution at. AND as soon as my responsibility as dad & housekeeper are over today, I will fix the issue and post about it. (Waiting on the wife to return from visiting a cousin in the hospital a few hours away who has brain cancer.)
 
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