front forks / wheel interchange on dohc

[Enygma]

hey guys

so i have a *'80c  and picked up a '81k cheap for the really nice chrome spoke rims.
rears were straight across fit with the drums. got a 17" on the c now :)

seems the front comstar off the C has a shorter axle (narrower forks)?  than the K (has the air shocks btw)
both single disc.  the axles seem like theyre corroded a bit to the spacers maybe? as i cant seem to figure out how to remove them from the wheels to try keeping original axles/spacers in place, didnt want to just get out a ball peen and a punch, any advice would be greatly appreciated.

givin the k to my son for xmas, runs pretty good even- he is jazzed-starting a new generation on the good old stuff yay

happy holidays fellas

[TOOLS1]

Sorry for the late response, this got buried really quick. The front axle on the K has a nut on the one side, and a flat on the other for a wrench. You must remove the nut to remove the axle. As for the swap, the K wheel will go right onto the C model forks. Just use the C model wheel. For the breaks, you will need to use one of the C model rotors, and only one caliper since the K wheel will not accept the second rotor on the other side.
TOOLS

[MD750]

Sorry to revive an old thread, I will be doing the same swap and wanted to see if I can get any advice on how I can remove the axle nut from the hub.  It seems to be fused to the axle and I'm starting to strip the flat spots on the axle.  Thanks in advance...

[shinyribs]

Forgive me if this sounds insulting,but did you loosen the axle clamp?

[MD750]

It's not insulting at all, thank you for the help I'm a Noob.  If I am correct, the axle clamp is what holds the axle/ wheel to the fork.  I forgot to mention that the wheel (actually the whole hub assembly) is off of the bike.  I purchased the spoke wheels from someone and was going to powdercoat and re-lace the wheels.  Unfortunately I can't because the axle will not come out.  

[sgtslag]

Again, don't mean to insult, but spoked rims require tubes in the tires, where Comstars typically do not (early Comstars did, apparently, require tubes).  Just want to be sure you don't have a sudden loss of pressure at speed, due to tubeless tires on the spoked rims.  Cheers!

[MD750]

Understood, I have the tubes and have done research on it and will be using them as supposed to sealing up the spokes to make them airtight.  I just can't get the axle off of the hub, tried using a little heat, small impact wrench, tapping with a hammer on the axle ends and still nothing.  I have no idea why the axle nut will not budge.  I don't want to force it, was wondering if I'm missing something?
Thanks

[shinyribs]

Well,my next suggestion was heat/impact. But you've already tried that. The only piece if advice i can think of is to soak it and make sure to use a six point socket that fits well.

I have a '81 C front end in my barn. I dont exactly remember how the axle assy worked,but i'll take a look and see if I can find anything that will help. Good luck to ya bud.

[Hoosier Daddy]

MD750 wrote

 how I can remove the axle nut from the hub.

Terminology? The nut sould not be attached to the hub in any way.... Are you trying to remove the axle shaft from the center of the wheel hub or remove the nut from the end of the axle shaft?



 If you have the nut (16) off and are trying to remove the axle (1) from the hub (3), Can you remove the first spacer (2) ?  If so, the axle passes through another steel spacer sleeve (5) between the wheel bearings (20), if moisture finds it's way past the seals, the axle can rust tight into that spacer sleeve.
 Try putting the nut back on the axle to protect the threads and keep from mushrooming the end, Then drive it out with a hammer.Try to use a Brass mallet or drift if you have one. Once it breaks loose you can take the nut off and pull the axle the rest of the way out. You will most likely need new wheel bearings from the same moisture, and new seals, maybe even a new nut if it gets distorted too bad. But that should protect your axle shaft and allow you to remove it.

[MD750]

Thank you for the responses, I am trying to get (16) off of (1).  The spoke wheels are from a CB750K and I have already cut the rusted spokes off of the wheel, that's why I said hub assembly.  

[MD750]

No need to go to the barn, I already have the axle off of my 81C...

[MD750]

I wanted to thank everyone for the help.  I stopped by the local hardware store and picked up a steel pipe and 12 point socket to go battle this beast of a nut and I glad to say that I won (finally).  I applied a little heat and used the pipe on an open ended 17mm wrench and got enough leverage to pop the nut loose.
Thanks again for the suggestions...