convert driveshaft 2 jack-shaft or extend driveshaft - Honda Shadow Forums : Shadow Motorcycle Forum

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Old 03-17-2007, 12:26 PM   #1 (permalink)
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Default convert driveshaft 2 jack-shaft or extend driveshaft

This is for my Honda CX650 chopper project... I want to build a custom frame, and to be able to pull off the frame I have in mind, I either have to figure out how to extend the driveshaft and swingarm to use the existing final drive and wheel (which look really cool) or, I have to convert to a jackshafted, sprocket or cogged belt drive, which I am open to, but it will take some thought and doing to get the final drive ratio correct. The benefit of the Jackshaft set-up is that I can build whatever frame I have in mind, and choose whatever wheels to compliment the project. ANY and all ideas or links that could help me, or if someone has already been down this road, let me know, PLEASE!
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Old 03-17-2007, 12:34 PM   #2 (permalink)
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Default Re: convert driveshaft 2 jack-shaft or EXTEND driveshaft (O

Quote:
Originally Posted by Shogun
This is for my Honda CX650 chopper project... I want to build a custom frame, and to be able to pull off the frame I have in mind, I either have to figure out how to extend the driveshaft and swingarm to use the existing final drive and wheel (which look really cool) or, I have to convert to a jackshafted, sprocket or cogged belt drive, which I am open to, but it will take some thought and doing to get the final drive ratio correct. The benefit of the Jackshaft set-up is that I can build whatever frame I have in mind, and choose whatever wheels to compliment the project. ANY and all ideas or links that could help me, or if someone has already been down this road, let me know, PLEASE!
Shogun,

First off let me say that I have NO experience doing this with either cars or bikes...but I will give you my thoughts on the process.

Since you are wanting to use the final drive and wheel, and will have to make a new swingarm (I am assuming) to fit everything together properly, then why not make a longer driveshaft to connect the final drive unit with the transmission? You will still need to have the tube for the drive side of the swingarm. And you will still need to provide power to the rear wheel, so why not just extend the driveshaft as much as you need?

If I am missing something...let me know. I will try to come up with another idea.

Good luck on the build.

Joe

P.S. I fail to see how this is off topic too. It pertains to motorcycles and that is what this place is all about.
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Old 03-17-2007, 02:06 PM   #3 (permalink)
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Thanks. I thought about going to a custom drive shaft builder, and have the existing shaft cut and a tube, maybe say 1.00 dia., welded to each end, much like a car drive shaft, to get the length I need. And then cut, weld, and stretch (using a flat steel plate to jig it and keep it straight) the swing-arm a few inches. I am only considering the drive shaft builder because I figure someone like that would have the equipment to machine it, weld it, and keep everything straight, and balance it.

On the other hand, the jack-shaft setup might work to use a larger rear tire, but I am not hung-up on this idea. Right now the goal is to use as much parts as possible from the donor bike.
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Old 03-18-2007, 07:58 AM   #4 (permalink)
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Take it to a machine shop and have it stretched. They will use a lathe and keep it straight so you won't have any annoying vibrations. You will have to stretch the shaft and the housing to keep the integrity of the swing arm. I checked into it for my chopper project (Yamaha Seca - shaft drive) and it would run me a couple hunderd bucks to do it for mine. I'm still not sold on the whole longer swing arm idea. I like the way it handles just the way it sits now. >PD<
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