Running control cable

Use a bmx brake cable...cut cable and noodle to length and a swivel stop/cable knarp...

Lube the noodle plenty and boom done

don't want too much of it exposed so that some smartass can yank on it

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I'm assuming he means a frame with cable bosses where parts of the cable are not surrounded in a sheath. My frame has bosses so the straight lengths of both derailluers and the rear brake are exposed cable. I added bosses for my motor throttle cable. I love having them. Makes removing and lubricating the sections of cable sheath so much easier. Plus you can join two pieces of cable if you don't have one long enough (which can be a long run on a rack-mounted setup).

I never thought about someone yanking on the exposed parts. Sounds kinda kinky to me.

I think this is way down on the list of things to worry about.
Concentrate on keeping things tight and straight.

How have you guys run your cables successfully?

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That can be an issue with a DIY (chainsaw) motor build. Don't worry about that "someone yanking on the exposed cable" thing. But if you do the throttle cable all enclosed in sheath from the handlebars to the motor on a rear rack, you'd better make sure it is well secured to the frame at the front and rear points. Otherwise it won't work right. That little half-inch (at most)of cable pull from the lever can be absorbed by a floppy cable sheath, making your throttle a nightmare to control.

A major problem I've noticed with DIY's is that the carb's throttle spring is too weak to return the lever when you release it. You have to remedy this somehow. That's why I like having cable bosses on the frame. I added an extra spring before the boss on one of my builds. I'll show an example or two if you'd like.

Let us know how that chainsaw build is going.