I think i need to replace my rear master cylinder. My back brake is absolutely terrible - got a braided hose, new pads, rebuilt rear caliper and its still no good. I think the rear master cyl needs replacing.

Is there any master cyl from a newer bike that will fit? Maybe a motocross bike one maybe?

Thanks.

ps: Yep i know the rear brake on an nc30 are crappy anyway but i want to sort mine so at least it'll work okish.

Have you bedded the new pads in / bled the rear brake properly and made sure it's adjusted properly?

Yep done all that.

Any alternatives?

All late model honda nissin rear master cylinders look the same to me, but I guess you'll need to measure up the bolt distance.

Ive never had a NC with a decent rear brake, not one of there strong points i think.

i feel his pain, my UK bike has a superb rear brake yet the import is utter shite.
and the RC just seems to make the wheel dusty and thats about it.
i use the rear brake quite alot. i think its an age / generation thing, growing up riding 125LC's and 350LC's with shit front brakes, you kinda relied on the rears.
i personaly find it comfier to slow down using the rear, being a 15 stone fat boy braking with the front just makes me wrists ache

lol i'm the opposite.

The rears only ever used for being too hot in corners and standing at hills / traffic lights...