CB750 rear wheel on 73 Commando ?

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84ok said:
details for these saw cut sprockets pls?
Click to expand...
You can use pilot bored duraliam sprockets I have one on my commando
I counter bored mine half its width where it bolts to the cush drive to get the chain alignment right
 
84ok said:
looks like at least 2 diff axles were used with early cb750

https://www.partzilla.com/product/honda/42301-425-870?ref=60b492d41a00e61e1422c3a832674ceb6a0153cc

cant find info earlier than 76
https://www.partzilla.com/product/honda/42301-300-020?ref=9a2c6905bf66318106f95930dd28d7c153513576
Click to expand...

Thanks...I don't have a CB750 wheel but did look up the wheel bearings for early CB750's and the smaller non sleeved ones are 20 mm ID, same as the CB450Kx
The diagram is for a CB750, CB450 is similar but the cush drive is completely different.

CB750 rear wheel on 73 Commando ?
 
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baz said:
If you have a lathe you can usually re make the bearing spacers down to whatever size you like
I have done this many times,also using bearings with the same od but smaller Id
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I have indeed been thinking about about using this project as an excellent excuse to finally buy a lathe ;-) and will look into maybe a bearing change to make a 17 mm axle fit my CB450 wheel so as to minimize the material removal required on the swingarm slots.
 
Bluto, If you swap the bearings for the rear hub to go to a 17mm axle, I think you'll also need to get a bushing for the drum brake face plate too. I wouldn't slot the swingarm to use a 20mm axle either... as you said.
 
This all seems to be a lot of work when Don has already got the answer with his new hub...and a lot less unnecessary and irreversible work!....IMHO
 
manx850 said:
This all seems to be a lot of work when Don has already got the answer with his new hub...and a lot less unnecessary and irreversible work!....IMHO
Click to expand...

Don's hub, along with all the stuff he makes, is excellent. I did my modification thinking I could have all the improvements that Don's parts would give me for about half the price. As it turned out, my machine work costs quickly made my costs more expensive and I don't think I saved a dime especially since I spent a lot of time doing research, making parts, and running around to the machinist. I certainly wouldn't bother to adapt a hub to a commando that was a "spoke hub" since Don's parts are available and beautifully made.

Wtbs, I have a rear sprocket that I can change without removing the wheel. I can change it's size, which you can't do on your stock norton parts. I use a tubeless tire, and I would bet that my cast wheel is more rigid than a spoked aluminum wheel. As far as irreversable goes, I saved all my stock parts and actually bought a second swingarm to modify to accept the cast wheel, so my modification is easily reversed if I wanted to do that.

As far as looking like a norton goes, you got me on that one, but I'm in good company with the many beautifully modified commando's out there that aren't "stock", including Don Pender, Jim Comstock, Yves, and a long list of fantastic Commando based specials. For more than 40 years, I've had fenders painted to match the tank and side covers. It's so "not stock", but I liked the look better than chrome. I love that CNW paints their fenders. I think it makes their bikes look better than gawdy stock chrome fenders. It's nice to see that all these high quality nortonistas aren't limiting themselves to "stock" applications.
 
manx850 said:
This all seems to be a lot of work when Don has already got the answer with his new hub...and a lot less unnecessary and irreversible work!....IMHO
Click to expand...
As I said I want easily sourced detachable sprockets and to probably go to 520 chain as well plus the Honda wheel already has the 18" rim I want too. I think Don's products are excellent, am using the front MC and fork dampers on my bike...but want to go a different route for the rear wheel.
 
o0norton0o said:
Don's hub, along with all the stuff he makes, is excellent. I did my modification thinking I could have all the improvements that Don's parts would give me for about half the price. As it turned out, my machine work costs quickly made my costs more expensive and I don't think I saved a dime especially since I spent a lot of time doing research, making parts, and running around to the machinist. I certainly wouldn't bother to adapt a hub to a commando that was a "spoke hub" since Don's parts are available and beautifully made.

Wtbs, I have a rear sprocket that I can change without removing the wheel. I can change it's size, which you can't do on your stock norton parts. I use a tubeless tire, and I would bet that my cast wheel is more rigid than a spoked aluminum wheel. As far as irreversable goes, I saved all my stock parts and actually bought a second swingarm to modify to accept the cast wheel, so my modification is easily reversed if I wanted to do that.

As far as looking like a norton goes, you got me on that one, but I'm in good company with the many beautifully modified commando's out there that aren't "stock", including Don Pender, Jim Comstock, Yves, and a long list of fantastic Commando based specials. For more than 40 years, I've had fenders painted to match the tank and side covers. It's so "not stock", but I liked the look better than chrome. I love that CNW paints their fenders. I think it makes their bikes look better than gawdy stock chrome fenders. It's nice to see that all these high quality nortonistas aren't limiting themselves to "stock" applications.
Click to expand...
Great idea on the extra swingarm :), just found one myself at a good price and it is enroute...though actually it would probably be possible to weld up a swingarm with widened slots and then machine it back to stock specs. Still am glad I'll have a spare and be able to set it and the new wheel up on the workbench before I ditch the stock setup.
 
bluto said:
Great idea on the extra swingarm :), just found one myself at a good price and it is enroute...though actually it would probably be possible to weld up a swingarm with widened slots and then machine it back to stock specs.
Click to expand...
apparently something irreversible for some folks
 
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Klaus was kind enough to email me twenty photos of the Suzuki wheel (very similar to the Honda wheel I'm working with) installed on his bike (and some of the axle, spacers, etc. too) and said it would be OK to post them. Here are six of them...

CB750 rear wheel on 73 Commando ?


CB750 rear wheel on 73 Commando ?


CB750 rear wheel on 73 Commando ?


CB750 rear wheel on 73 Commando ?


CB750 rear wheel on 73 Commando ?
 
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bluto said:
Klaus was kind enough to email me twenty photos of the Suzuki wheel (very similar to the Honda wheel I'm working with) installed on his bike and said it would be OK to post them. Here are six of them...

CB750 rear wheel on 73 Commando ?


CB750 rear wheel on 73 Commando ?


CB750 rear wheel on 73 Commando ?


CB750 rear wheel on 73 Commando ?


CB750 rear wheel on 73 Commando ?
Click to expand...
That's a great conversion
It's bound to be lighter than standard
And sure to offend some people which makes it even better
 
Hello,
there is another underrated advantage of the Suzuki rear wheel in the Norton swinging arm:
In case the rear wheel needs to be dismantled, the chain, sprocket carrier etc. can be left in place. Even the chain tension can be left as is. You don't have to touch this assy, because the original (but slightly altered) dumy axle is still in use. I think that is a real big advantage.
But there is also a big disadvantage of the whole set up: The braking performance of the rear wheel is only marginal, due to the bowden cable running from the left to the right hand side of the bike. I now try a differnt bowden cable that comes originally with the necessary bendings. I found one: It is the clutch cable from the Suzuki TL 1000. It needs to be altered also but let's see.
There may be another reason why the braking performance of the wheel wasn't satisfactory. I got the original Suzuki brake shoes re- lined by some company in Germany which are not speciallized on motorcycle brakes. They may have picked the wrong material. I will now try Ferrodo brake shoes and together with the new bowden calbe I hope to have found the right answer.
The marginal braking performance wasn't too important to me during the last 7000 miles, because my front brake is exceptionally good with the 12,7mm brake piston conversion I have for the front brake.
Best Regards
Klaus
 
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