Throttle and Control cable travel

How far should the inner cable move in and out ?

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Throttle and Control cable travel


Post by roman » Wed Dec 04, 2019 4:27 pm

With a secured outer cable I am only getting 3/4 inch travel (full stop to full open) on the inner wire for both the spark and throttle. This seems minimal given the length of the handlebar slots and handle bar sleeve spirals. Taking the handbag sleeve off, the roller/pin assembly is always at about in the middle position. I can push both roller/pin assemblies with a screwdriver the full length of the handlebar slot, spirals look good but on assembly I only get 3/4 movement on spark/throttle. What are you guys getting for travel?

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Re: Throttle and Control cable travel


Post by 1950Panhead » Wed Dec 04, 2019 5:25 pm

Slot is 2", roller od=.375', cable travel is 1.625"
Hold plunger and push cable back and forth, should be tight, if not repair.
There is a pin, slot guide, roller on the plunger, if these parts are worn or missing you loose lots of cable travel.
Lots of grease on all these parts.

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Re: Throttle and Control cable travel


Post by Buddhahoodvatoloco » Wed Dec 04, 2019 6:01 pm

The travel can be influenced by the routing also, but El Senor 5) Pan hit the nail on the cabeza, it's all common sense actually. Think it through all the way. :lol: :lol: :lol: :lol:

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Re: Throttle and Control cable travel


Post by RooDog » Wed Dec 04, 2019 7:58 pm

Mechanical stuff is mechanical. If it can't be done with a smarty pants phone, it can't be done at all..... LOL..

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Re: Throttle and Control cable travel


Post by Andygears » Wed Dec 04, 2019 9:50 pm

Roman! Are you measuring the travel with the inner fully released from the throttle bell crank on the carburetor?

If not then the positioning of the throttle bell crank on the throttle shaft is usually the culprit. As I have said before, the wide open throttle plate, the wide open throttle handgrip position, and the extreme left position of the bell crank on the throttle shaft should all be aligned when the clamp screw is tightened on the inner wire. Then, if the throttle will close against the idle speed screw, why would you need more travel?

If parts are missing or badly worn as others said ....fix em, and if you are truly without enough travel perhaps the internal spiral in the grip is damaged. Try this, assemble the grip but leave out the end screw, hold it in and crank wide open, now pull the grip straight outwards. There’s your lost travel, the roller can’t move past that spot in the handgrip spiral, remember, any “extra” travel must be toward the idle direction or you will push the throttle plate over center.


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