Engine is running, but throttle is not...help?

[vrecksler]

http://www.thegsresources.com/_forum/showthread.php?t=106280

The above is how my tale begins, but in case you don't want to check it out here is a quick summary: My bike died last fall while riding home in a rain storm. It did not die abruptly, rather the revs just decreased linearly until the engine stopped. It would not start up again and a friend thought he had traced the problem to a part that the Suzuki dealer mechanic identified as a CDI, the folks here said it was related to the turn signal.

Steve, a member here, took the time to send me an email with some things to try and even called me to explain the email. It took a few days for me to get the time to tinker around, and it is now running! Woot!

The bad part is, the throttle seems stuck....if I try to roll on the thing will not move. If I try and really torque it open it still does not want to move. I pulled apart the kill switch to look for some snag in the throttle tube but it is fine. Yet when I used some pliers and tried pulling on the throttle cable it would not budge...not even a little. I grabbed my cable lube and dowsed it good and tried a half hour later but nothing.

The funny thing is if I reach under the tank I can grab open cable and rev the bike just fine, yet the cable I am using does not appear to be the throttle cable when I trace it back to the throttle tube. I have attached a picture of what I am yanking to get the bike to rev, it is the cable on the right. Both of the cables shown have a little play and both seem to open some kind of gates, but I don't really understand which does what.

Regardless, the throttle cable is not working so any kind of tips you can provide would be great.

Bradley

 

[81gs750bagger]

the one coming out of the threaded nut is the throttle cable, the other cable in the right of the pic is the choke cable..that's probably the one you're pulling on...rob

 

[vrecksler]

the one coming out of the threaded nut is the throttle cable, the other cable in the right of the pic is the choke cable..that's probably the one you're pulling on...rob

OK, thanks Rob.

The throttle cable can also be pulled from that spot (under the tank) but no from the throttle tube. Is this a simple throttle cable replacement or is there some kind of common snag or hang up I can try to loosen?

 

[81gs750bagger]

cable is probably rusted.. you can try to disconnect both ends and see if you can get it to loosen up. otherwise it's a cheap and easy fix to replace..

 

[Chris Bohane]

cable is probably rusted.. you can try to disconnect both ends and see if you can get it to loosen up. otherwise it's a cheap and easy fix to replace..

Just a thought....... has the cluch cable moved and is jamming against the "springy" bits that open the carbs?
The cluch cable comes over from the top of the head and go's down between the carbs on its way to the clutch.

 

[Guest]

I've had my carb boot clamps screws jammed in my throttle assembly before.

 

[arveejay]

The pic shows both cables, the right one is throttle. There is a U shaped linkage in the pic that shows a hose going thru it. That hose is blocking the throttle from moving I think. Or am I missing something?

 

[Quasi]

I think the only way you'll find out for certain is to disconnect it at both ends and push/pull the inner cable. If the strands have started to unwind then it'll get snagged inside the outer sheath.









Quasi.

 

[Steve]

The pic shows both cables, the right one is throttle. There is a U shaped linkage in the pic that shows a hose going thru it. That hose is blocking the throttle from moving I think. Or am I missing something?

The assembly with the U-shaped linkage looks more like the choke to me. The tube running through the U appears to be the vacuum line to the petcock.

One thing to keep in mind here, the picture is shooting toward the back, so we need to keep terminology straight. The cable on our right (with the U-shaped linkage) is on the left side of the bike. The cable on our left is on the right side of the bike.

Bradley,
The cable that goes straight down, with the threaded adjuster is the throttle cable. The one with the U-shaped linkage is the choke.
Remove the right hand grip assembly to remove the throttle cable. Remove the fuel tank so you can follow it to make sure you have the right cable. If you can't move the cable, it is possible that it is rusted up inside. New cables are relatively cheap. If you do get it to move, I would consider a new cable, anyway. You certainly don't want it to lock up like this in the OPEN position while you are riding. :shock: A new cable would be cheap insurance.


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[81gs750bagger]

the hose is the fuel hose and the u shaped linkage is choke linkage , that's exactly like my 81 750,hose does not obstruct throttle or choke linkage,throttle cable is coming out of threaded nut

 

[vrecksler]

Thanks for the comments everyone.

I did remove the kill switch (right hand assembly) and tried pulling on the inner throttle cable, it will not budge. I blasted it with a ton of cable lube, no change. And it is the throttle cable, as I traced it (with the tank removed) to the threaded nut. As far as I can see, there is no real interference with the outer sheath of the throttle cable and there is play the entire length.

It sounds like a throttle cable replacement is the way to go; like Steve said it would be good piece of mind knowing that the cable is new and working rather than trying to make do with something that could go later.

You guys rock!