Yet another master cylinder question

[StrayAlien]

Hi all,

Race regs for my class permit me to change the master cylinder. I have OEM on at the moment on my 93 NC30. I beleive they are 14mm. I'd like to have more powerful braking. I am not permitted to replace calipers, just the MC.

I could refurb them I guess, but if I am going to spend then I'd like to consider a better replacement. I prefer new to 2nd hand for the race bike.

I've seen discussions on this forum on using various MCs - but most are from a on-road perspective. I have turn 4 at Phillip Island to consider.

So, without braking (pun intended) the bank, I was considering these:

http://www.accu-products.com/brembo/bre ... 21878.html

I have put them on a Ducati I own (which had the older 'coffin' style brakes) and they are pretty good.

Will they suit the NC30?

All comments appreciated.

[magg]

You are not considering a change of brake pad material, what pad material are you using?

[Cammo]

Magg beat me to it. I used to run Performance Friction carbon pads (google them) and they were more than enough on track on standard calipers. Premium product - they ain't cheap but they also last much longer than any other pad I've tried.

Changing master cylinder bore just changes the feel at the lever and hand pressure required, it won't change overall braking performance.

[StrayAlien]

Thanks. I am using Carbone Lorraine pads at the moment. I have heard the Performance Friction pads are pretty good, so I'll try them next time. Actually, it is the lever feel I am interested in changing. On the brake setup I have I get the end waving in the air every now and then so the braking is good, but the feel at the lever is not to my taste.

I've bled it to death (top and bottom) so I figure that, maybe, that is just the way it is.

So, the above 16mm piston Brembo MC would fit?

[Morespeedvicar]

Wouldn't going in up in master cylinder dia give you less stoping force due to less leverage? But would feel more solid, were as a smaller dia would give you more stopping force (for a given lever pressure) but a spongyer (spelling) feel?

[bollo]

hi straya what class do you run ? i run P6 400 & i can change my calipers & master cylinder, i am running Brembo Gold series calipers & a Brembo master cylinder if you want pics let me know

[Cammo]

I imagine it's Formula 400, better fields than P6 here in Vic.

[StrayAlien]

Wouldn't going in up in master cylinder dia give you less stoping force due to less leverage? But would feel more solid, were as a smaller dia would give you more stopping force (for a given lever pressure) but a spongyer (spelling) feel?

I am not sure if it gives less stopping force, but I am after a more solid feel - the OEM is pretty spongy. But, maybe the place to start is with a MC rebuild kit. After all, the poor thing has had 15 years as a dedicated race bike - who knows if anybody has ever rebuilt it.

What racing class? Yes, Formula 400 (modified). Presently just the in interclubs. The rules say just he MC, not the calipers. The Period 6 class is a little more loose in the rules.

[Neosophist]

Wouldn't going in up in master cylinder dia give you less stoping force due to less leverage? But would feel more solid, were as a smaller dia would give you more stopping force (for a given lever pressure) but a spongyer (spelling) feel?

I am not sure if it gives less stopping force, but I am after a more solid feel - the OEM is pretty spongy. But, maybe the place to start is with a MC rebuild kit. After all, the poor thing has had 15 years as a dedicated race bike - who knows if anybody has ever rebuilt it.

What racing class? Yes, Formula 400 (modified). Presently just the in interclubs. The rules say just he MC, not the calipers. The Period 6 class is a little more loose in the rules.

Rebuilding the MC would be the best place to start...

[bollo]

i have a Honda 954 mc that i bought from the US if thats any good to you