NC23 swing arm.

[91cb-1]

So on impulse i bought an NC23 swing arm cheap as chips off e-bay, can anyone explain or put up pics of mods and alterations that i need to do to put it on my cb-1? for starters rear shock mounting, on the swing arm there is an attachment that i assume would attach to the a second part of the frame on the cbr 400 but as i don't have this attachment on my cb1 can i just remove it and mount rear shock straight on? do i need to change bushings and axle? if it's too much work i will be selling it again it was just a cheap buy, in great nick

[a_morti]

http://hondacb1.proboards.com/index.cgi?board=CB1Discussion&action=display&thread=130&page=1

Since the NC23 and NC29 can interchange wheels with each other and the CB-1 (with spacer changes) and the NC23 and 29 share the same crankcases and so engine and frame rail width, I imagine that in my little write-up there, you should just be OK to substitute 29 for 23.

Enjoy

[91cb-1]

Every thing you posted up there was exactly what i didn't want to hear, too much work and machining, if i had the time money and machines i would do it but as it stands i have now got a swing arm for sale!!! thanks alot all the same and your bike looks great.

[a_morti]

If you get the NC29 rear wheel and axle, then it's only two spacers needed (I had them made up at a local place for £10 a piece) then drilling out the centre spacer, and making the shock mounting block. You didn't really think it was going to slot straight in, did you?? Looks lovely when it's done

[91cb-1]

I know it does but to be honest loosing the center stand is my biggest regret i spent ages trying to find one and it makes life so much easier, plus i got a surplus of wheels already couldn't justify gettin an other one thanks for all the info all the same, didn't think it would slot RIGHT in but i had a friend tell me it was easier than that, just different washers and bearings, shows what he knows!!!

[willy65000]

With a swing arm that puts the rear of the bike higher in the air, are there any problems with changing the front end geometry (rake and trail)?

[a_morti]

As long as you don't take it to extremes, it's fine. When you make the shock retaining block you are completely in control of the ride height. I raised the rear a little bit and my CB-1 was always as stable as a stable thing, even with weight in the top box. Here you can have a look, I only went up maybe 30 or 40mm.

[91cb-1]

As long as you don't take it to extremes, it's fine. When you make the shock retaining block you are completely in control of the ride height. I raised the rear a little bit and my CB-1 was always as stable as a stable thing, even with weight in the top box. Here you can have a look, I only went up maybe 30 or 40mm.

What extension did you put on the front brake and why? not bein sceptical just intregued!

[a_morti]

That's the brembo front brake setup from a cagiva planet 125 , attached using an adaptor from www.spiegler.de.

The originals were never that good, but this setup was awesome.

[MintyFRESH]

Center-stands are over rated. All you need is a rear adjustable paddock stand.

[Drewski]

Center-stands are over rated. All you need is a rear adjustable paddock stand.

What about if you have to change the swingarm? Or remove both wheels

[Falk]

For this just take a Beer-Bottle-Box (I hope you have that for 20 0,5l Bottles like we have here in Germany)...

[91cb-1]

For this just take a Beer-Bottle-Box (I hope you have that for 20 0,5l Bottles like we have here in Germany)...

I'm guessing you ballance the engine block on the bottle box. so to do this you have to remove the exhaust whether it's one piece or two piece you still have to take off the down pipes which means that when you want to put it back on you've got to replace the o-rings givin yourself alot of work in my eyes. also center stand makes takin off the front forks alot easier. i used to have to put two axle stands under the crash bungs putting alot of pressure on the engine mounting bolts! now its alot easier just put weight on the back of the bike and hey presto job done

[MintyFRESH]

Drew, you make a valid point.  I also own a front paddock stand and a 2-tonne car jack.

[a_morti]

For this just take a Beer-Bottle-Box (I hope you have that for 20 0,5l Bottles like we have here in Germany)...

I'm guessing you ballance the engine block on the bottle box. so to do this you have to remove the exhaust whether it's one piece or two piece you still have to take off the down pipes which means that when you want to put it back on you've got to replace the o-rings givin yourself alot of work in my eyes. also center stand makes takin off the front forks alot easier. i used to have to put two axle stands under the crash bungs putting alot of pressure on the engine mounting bolts! now its alot easier just put weight on the back of the bike and hey presto job done

Like so...



But that time I had the exhaust off anyway. Seriously, how often do you need to do it? Usually I would use a rear stand and jack if the forks need to come out, and I can't remember the last time I had to have a rear shock or swinger out, but will admit it makes the job more awkward.

The CB-1 exhaust makes it tricky, but my dad has a little wooden toolbox that fits exactly right under an early blade's 4-2-1 collector bit to hold the bike about an inch off the floor, steady and level.

Anyway we are missing the point here - that swingarm looks awesome!

Did I ever say that I removed my c-stand because it was broken anyway, and because it would have not had the exhaust bit to hold itself up? I didn't ever actually check whether I could have kept it or not. Though even if I could have it would have looked awful, as it would have neatly filled that gullarm-gap.