Technical Questions - Wrist Twisters
 
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post #1 of 9 Old 02-03-2014, 03:34 AM Thread Starter
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Technical Questions

I am having a problem with my throttle cables. The spring that controls the throttle on the carburetor works perfectly fine and returns without a problem but when you attach the throttle cables it does not want to spring back. I do not know what I am doing wrong.

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post #2 of 9 Old 02-03-2014, 05:52 AM
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Quote:
Originally Posted by Hindenburg View Post
I am having a problem with my throttle cables. The spring that controls the throttle on the carburetor works perfectly fine and returns without a problem but when you attach the throttle cables it does not want to spring back. I do not know what I am doing wrong.
Could you give a little more information? bike, year etc? and inroduce yourself in the new member thread! I would guess your throttle cables are stuck... Have you tried moving them while they aren't connected?

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post #3 of 9 Old 02-03-2014, 06:01 AM Thread Starter
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My apologies. I am a CM2 in the US NAVY SEABEES. I bought a 2002 kawasaki Vulcan 750. I am stripping it down and rebuilding all major components. And sometimes it's the simple solutions that I over look. The throttle spring and carburetor as a whole unit work properly. And the throttle cables move freely without any resistance. But when I attach the components, I turn the throttle but it fails to spring back.

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post #4 of 9 Old 02-03-2014, 06:56 AM
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Quote:
Originally Posted by Hindenburg View Post
My apologies. I am a CM2 in the US NAVY SEABEES. I bought a 2002 kawasaki Vulcan 750. I am stripping it down and rebuilding all major components. And sometimes it's the simple solutions that I over look. The throttle spring and carburetor as a whole unit work properly. And the throttle cables move freely without any resistance. But when I attach the components, I turn the throttle but it fails to spring back.
Well I would say the problem is most likely the return throttle cable and not the pull throttle cable if when you pull the throttle it actuates, but doesn't return? Are you sure the return cable is hooked up correctly? otherwise I know I've had troubles with sticky throttles if they're routed badly. Try turning the handlebars back and forth and see if that makes it return a little? also check your routing and make sure there aren't any big bends or pinches for the cables. One of my brothers friends painted his gas tank and when he put it back on he could get the bike to rev to almost 3000 rpm just by turning the handlebar to the left because of badly routed throttle cables... So i would definetly check that out as well

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post #5 of 9 Old 02-03-2014, 07:07 AM
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I had a similar problem once with my old KZ. Turned out to be the throttle tube itself. Got a different one off the shelf, problem solved.

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post #6 of 9 Old 02-03-2014, 07:07 AM Thread Starter
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I will check that out. I appreciate all of your advice. I'm a new mechanic and they don't teach you alot in the Navy an I'm working on personal projects to learn more about my bike.

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post #7 of 9 Old 02-03-2014, 06:32 PM
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Always check two cable systems for inadequate slack.
Everything else can be perfect, but if there is not enough slack, it will bind.
A quick test is to make sure the throttle bodies or butterflies are truly closed and resting against their stops.
Then attempt to twist the throttle backwards.
If it won't move in the reverse direction with fairly light pressure, then suspect inadequate slack.
It is so easy to get bitten by this when cables get changed, because of the amount of jam nut movement one typically does to allow easy removal of the old cable and easy fitting of the new.

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post #8 of 9 Old 02-04-2014, 01:32 PM
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On my dirt bikes, I would use a fine sharpie to mark the back end of the threads behind the nut so I knew where the nut was prior to disassembly. Made it a lot easier to get adjustment back 'in the zone'.

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post #9 of 9 Old 02-09-2014, 09:36 AM Thread Starter
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Just to follow up, I fixed my problem with the help of everyone on this blog, and I greatly appreciate it. The push cable was too tight and had to loosen it on the carburetor side. Sometimes it's the simplest things. Again, thank you for all your help.

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