throttle cable adjustment

heyall,

helping a friend restore a 1980 Honda CB900c. for some reason we can't get
the throttle cables adjusted to snap back after being rolled on. i'm
starting to think maybe the return cable is too long but before i start
hunting around for another cable has anyone had this kind of trouble?
something i'm missing?

thanks,

rhatte

 

Check the routing to ensure nothing is binding the cable.

 

Hey Rhatte,

I had a similar problem when I re-installed my carbs on my 86 Kawasaki 454
LTD after I cleaned them.
I hooked up the cables and tightened down the locknuts on the cables BEFORE
I put the carbs back on the engine and airbox. Everything seemed smooth and
snapped back as I expected.
As soon as I mounted them to the engine and hooked them to the air box I has
the same problem you mention.
This is what I did....
First checked for kinks and lubed the cables...didn't help much. I then
undid the locknuts from the threaded collars (however access was VERY poor)
gave both cables a bit of slack. Carbs snapped back just like new. It took a
bit of fiddling around to get everything just right (loosening, tightening)
so neither of the cables had too much play or were too tight.
I spent a while doing this for the obvious reason of not wanting the
throttle to stick open.
Hope this helps,

Fitchin

 

Firstly you should make sure that the cables are in good condition, and move freely when not
conected.
You should check the free-play in the throttle twist-grip.If there is none, you'll have this
problem.You should also set the free-play with the bars turned fully to the right, and then check it
on opposite lock, as many bikes will open the throttle slightly when turned to the right if the
free-play is too small.
You should also remove the twist-grip and clean the handlebar it sits on, and use a rag to clean
inside the twist-grip.Many people use petroleum based grease to lubricate inside the grip, and over
time it dries out and causes tightness.Personally I never lube the twistgrip, as there should be
very little friction between the hard plastic grip and the chrome bar.

 

also check you haven't overtightened the carb mounting boot clamps! Same
symptoms happen on mine if I overtighten those puppies. Drove me nuts trying
to find a problem with the cable or throttle.

Tom B.

 

huh. this is interesting. how did one affect the other? i know i tightened
them suckers down pretty snug. brand new cables routed fine no binding
anywheres so i'm a bit at a loss. i'll check the boots but curious as to how
they relate. driving me crazy - never had this problem before with any other
bike....

 

seems the boot deformed just enough to bind but not totally hinder the
"butterfly" don't know the technical term for it

Tom B