Mags to Spokes

[mluk1]

For a winter project I want to put some 21" spoke wheels on my 77' CB750F. Right now I have the stock mags on there. Originally I was going to find a 77 or 78 CB750K, take the rim hubs off them and lace them to the 21" rim. The only problem is that the rear of a K model is a drum brake, not a disc brake like the F model. Then I thought to use 2 front rim hubs and do it that way, but then I realized there was no place for a sprocket. Is there anyway around this? Are there any of methods of putting on 21's? Are there other models of CBs or honda hubs I should start looking for?

[Re-run]

You may be able to use the back hub of a gl1000 goldwing. I think the 70s models used spokes.
Main issue then is just getting your spacing right but I think you can go that way.

[mluk1]

I just looked it up, and it doesn't look like it'll work. Although the GL1000 is a spoke wheel with a disc brake on it, it is a shaft drive. So I don't think a chain sprocket will fit. Are there any other bikes that are a chain drive with a spoke rear wheel that supports a disc brake? Someone mentioned to me that I could change me rear brake into a drum. How difficult would that be?

[mluk1]

I think I might have given up the idea of running 21" and 21", it'll cost $200+ to just get the spokes made. And the idea of running a disc brake in the back. I'm thinking it'll be easier to run 19" and 19", hoping that there is a Honda model that runs a 19" rear. On Ebay I came across a guy who is selling a rear wheel that he claims is a 19" from a 74 CB650, does that sound right? He doesn't give much of a description on it.

http://cgi.ebay.ca/Rear-Rim-19-/110559437970?cmd=ViewItem&pt=Motorcycles_Parts_Accessories&hash=item19bddb2492

[Re-run]

There was no honda 650 in 1974. That didnt come out till 79. and did not have a 19 inch wheel I am pretty sure. Tell you the truth, it looks like a 750 wheel which would be 18 inch.
I have not seen many do 21inch or even 19 inch.
The gl wheel might still work though, depending on what you want but I think it is still a 17 inch rim.

Maybe you can get the seller to actually lay a measure on the rim and snap a pic of it. If it is 19, you could get it and lace up your hub to it maybe.

[RobCB750K7]

Hi, just discovered this forum - great!  I believe the 1975/6 CB750F1 ran spoke wheels with a rear disc set up but I think it was an 18" rear, 19" front if thats any help

[mluk1]

How could the GL rim hub work? Would I be able to put a regular chain sprocket on it?

How difficult is it to take off the disc brake system and replace it with a drum brake? I think I have more opinions if I do that. If I found a set of wheels from a 77" CB750K I could just run the regular front wheel (which would save me a lot of money) and try and lace the rear rim hub to 19" rim, where could I find a cheap set of spokes to use? There is a place on the internet that can make custom spokes to fit whatever you choose to do, but a a set of 40 spokes cost $100+ USD!

I like the look of two tires/wheels the same size, my end goal is the make my bike look something like this...

[mluk1]

Rob,

It looks like you're right, the 1976 CB750F ran spoke wheels! Now to find these hubs...

[Re-run]

Well I think you will be looking at some cash here. Spokes are going to be 100 easy. Given the difficulty finding spokes for the 78, I will be spending that soon too.
I too wish there were a cheap place for rims My rear is a bit chewed up from past botched tire changes before I got it.

From some looking, unless you find a used rim, they seem to be $700+.

You might try checking some of the chinese places like www.comstarsh.com
You have to email them but it might be an option.
I'll keep exercising some search-fu and see if I find anything else.

[Re-run]

Hey, check out buchananspokes.net!
Rims specially drilled! Yes they are a bit expensive but you can get 21 inch rims which can be drilled for your bike.

Best I have found so far but it would be all new stuff.

[mluk1]

I was looking at that buchanan website last night and I roughly calculated the price of running the 21's and it was around $700!

Now I think I have a new plan, find the front wheel of a 77 or 78 750K and running the stock 19. Then find the rear rim hub of a 76 750F (which is compatible with a disc brake) and lacing that up to a used 19 rim. Then just going with big big tires. Just hoping that it'll cost a little less then running 21s.

[Re-run]

Well 1 issue with 19 inch rims from most bikes is they were for the front. Now lacing is still an option but the rim is going to be skinnier which means a skinnier tire.
It will be cheaper though.
On cost, till I checked buchanans, a single rim alone at most sites was $700 or more! Now that would hurt.
AND, they would still require work to work.

[vern401]

Wow I didnt know they put a disc brake on spokes at all.
I learned something tonite.





let us know how it goes... I'd love to see a pic of the finished bike.