Topic: CB750 Rear wheels

[H2Eric]

I have a K3 frame and swinging arm, I also have a rear wheel which came out of a K7, which of course will not fit as the later swinging arms were wider at the rear. It's not just the spacers that are different as the K7 wheel will not center in the K3 swinging arm. Is it perchance that it's the sprocket carrier that's the issue here?



Some measurements


back of sprocket to flange


Depth of bearing housing to sprocket



If the earlier sprocket carriers are narrower and assuming that the cush drive is the same then providing I can find one perhaps I might be able to use the K7 hub with the K3

Any info gratefully received
Thanks
Eric

[Dyrden]

I'm pretty sure the hubs are the same. The difference comes from the swinger, carrier and spacers.

[Patrick]

Use the K3 spacers and sprocket carrier and you can easily mount a K7 wheel on a K3 swing arm. I've done it a couple times. It is more than just the fit in the swingarm at issue. using the wrong sprocket carrier will cause the chain not to line up correctly.

Patrick

[Greggo]

Use the K3 spacers and sprocket carrier and you can easily mount a K7 wheel on a K3 swing arm. I've done it a couple times. It is more than just the fit in the swingarm at issue. using the wrong sprocket carrier will cause the chain not to line up correctly.

Patrick

Awesome!  I know this isn't my thread...I started one only to not get an answer.  Thanks Patrick!

[H2Eric]

Thanks Patrick, I new somebody would have the answer on here.

Have a great weekend
Cheers
Eric

[mcuozzo]

Well, you have your answer but yes it's the sprocket carrier that's wider. 

Here's the difference, courtesy of cyclex:

http://www.cyclexchange.net/index%20pics/picture%206.JPG

Also K7/K8's use 630 chains so you need to use and earlier sprocket as your K3 has a 530 front sprocket.

You should be able to use stock K3 spacers, axles etc. to make it all work.  Basically by using an earlier sprocket and sprocket carrier you have a stock K3 hub.

Good luck!

Matt