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Rear drum

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allankelly1:
Maybe just maybe



Hub is currently scrap at the moment and it would match my front end brake modifications upgrade I did last year



Just need to design and machine up and fit inside the drum area and secure in placed a custom disc carrier

Looking at callipers themselves a CB750 four would match the front end




And then just need to sort out a caliper hanger and remote master cylinder set up

 Winter is on its way and bike is now off the road till sorted and need another project to go with the 460 engine build during winter hibernation

Happy days

Best wishes Al


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K2-K6:
"Just thinking as I am a toolmaker with access to a lathe what donor drum please did trigger use and what was the interference fit etc he used?"

Thinking small car drums as scource material, maybe if you've a friendly motor factor to let you see stock items. Or something like trailer stuff,  indespension or caravan drums are in that range.

For disc conversion,  the original Yamaha RD400 (with twin piston calipers,  not floating single) had a pretty neat caliper hanger with brake top and torque arm located in similar area to the Honda drum one, that could give options or design que.

Twin piston for rear is easier for alignment as once designed you don't effectively have to cope with pad wear further on.

allankelly1:

--- Quote from: K2-K6 on October 09, 2021, 08:46:54 PM ---"Just thinking as I am a toolmaker with access to a lathe what donor drum please did trigger use and what was the interference fit etc he used?"

Thinking small car drums as scource material, maybe if you've a friendly motor factor to let you see stock items. Or something like trailer stuff,  indespension or caravan drums are in that range.

For disc conversion,  the original Yamaha RD400 (with twin piston calipers,  not floating single) had a pretty neat caliper hanger with brake top and torque arm located in similar area to the Honda drum one, that could give options or design que.

Twin piston for rear is easier for alignment as once designed you don't effectively have to cope with pad wear further on.

--- End quote ---
Hi thanks for the info

Really started to think about the rear disc conversion so for now going to go this way

Just ordered a cb400n disc like I have up front and then when it arrives planning to design and 3d print a prototype disc carrier

If all looks good and the conversation looks feasible by refitting the rear wheel with the prototype carrier and disc in its final place I can then sort out and caliper and torque arm set up again printing a prototype

Then if all look so I can commit to metal parts and go from there

Best wishes Al


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