RD400 Rear Brake Options

[RattlecanResto]

Wondering what any of you all may have used as a replacement rear master cylinder?I will assume a mounting bracket will need to be made. Any other mods?
Thanks

[Seizer]

https://hvccycle.net/yamaha-rd400-rear-master-cylinder-hvc200220/

Here's an option. Not cheap but allows you to keep the stock caliper.

[RattlecanResto]

Looking for an affordable option

[Dvsrd]

https://hvccycle.net/yamaha-rd400-rear-master-cylinder-hvc200220/

Here's an option. Not cheap but allows you to keep the stock caliper.

Just curious, what has the master cylinder have to do with the caliper? Except for bore diameter requirement? I would think mounting lugs, reservoir size & style, and pushrod dimensions are more important if stock pegs and brake pedal/linkage are used.

[m in sc]

youre right, its just bore size.

TBH, i use a 12mm but i have rearsets with a short lever  .

[RattlecanResto]

Keeping everything stock. Original bore size is 14mm?

[SUPERTUNE]

I've forgotten what the rear is... the front master is 5/8's
C

[Dvsrd]

Keeping everything stock. Original bore size is 14mm?

In that case, what about resleeving it?
https://www.practicalmachinist.com/vb/general/resleeving-motorcycle-master-cylinder-365558/

[Seizer]

https://hvccycle.net/yamaha-rd400-rear-master-cylinder-hvc200220/

Here's an option. Not cheap but allows you to keep the stock caliper.

Just curious, what has the master cylinder have to do with the caliper? Except for bore diameter requirement? I would think mounting lugs, reservoir size & style, and pushrod dimensions are more important if stock pegs and brake pedal/linkage are used.

It would've been more to the point if I had said that I'm using this MC with the stock caliper.

[Barrie]

There seems to be a good selection on Ebay.com, about 50,000 !