zxr750 h1 brake swap

[Gosling1]

.......I find a 14mm bore M'cyl. works best (actual stopping power as well as lever feel/effort) with 4 pots & 5/8 for 6 pots......

After swapping out my 14mm OEM m/c for a 19mm radial m/c - I will never go back to 14mm again.....that is on a ZX12R with 4-spot radial calipers.

[captain slow]

we cant get away with the radial type m/c this is one area that is going to get stomped on in classic racing.is there a m/c in the kwaka range thats larger than the 14mm type i have on the zxr h1

[dickfaber]

oh come on, i thought the point of historic bike racing was doing it like they did in the good old days.

in those good old days the brake lever was a thing you played with while looking for somewhere soft to crash!
or the old chestnut; if you playing with the brake, your not on the throttle!

[Gosling1]

Is this bike going to be a P6 bike ? I thought it was just a streeter - well if its going into P6 then the 19mm radial m/c is no good - not period legal unfortunately.

What you could use is a much newer 14mm m/c from a late-model kwakka - OEM Z1000, ZX12R etc - it is just a basic rectangular m/c but they work pretty well. I use one of these on my P5 bike, it works fine with some AP lockheed 4-fin 2-spotters ? Plenty of braking power there. If its good enough for a stock ZX12R then it should be fine for a P6 750 with 4-spotters.

[captain slow]

thanks gosling 1 will look into the later m/c i will see if this stops the fading iam at the thinking its the calipers thow will start with m.c cheers troy

[Gosling1]

it will be the m/c. I used to get fade with extremely* heavy braking on the 12 with the OEM m/c, but don't get any at all with the 19mm radial.

* chasing Strika down Mt Hotham on a fully-loaded barge at max revs......by about 2/3 the way down, the lever was almost back to the bars.....

[Kev]

Is this bike going to be a P6 bike ? I thought it was just a streeter - well if its going into P6 then the 19mm radial m/c is no good - not period legal unfortunately.

What you could use is a much newer 14mm m/c from a late-model kwakka - OEM Z1000, ZX12R etc - it is just a basic rectangular m/c but they work pretty well. I use one of these on my P5 bike, it works fine with some AP lockheed 4-fin 2-spotters ? Plenty of braking power there. If its good enough for a stock ZX12R then it should be fine for a P6 750 with 4-spotters.

I didn't know they made 14mm m/c Gos? It sounds pretty small for a ZX12 m/c. I thought they would at least use a 5/8 diameter.

[Gosling1]

pretty sure it has 14mm cast into the body mate, but will have a look to confirm.

I haven't seen 5/8" cast into a m/c body for a few years now

[old zx750]

thanks for that kev i would think that the tokico calipr of the zx9 would be better than the ones of the zxrh1and h2 .the m/c as far as i can tell is fine for know ,if you are going to run nissan caliprs from a gsx i would use the m/c off the same bike .as far a radial m/c in p6 there life will be short lived for they will be cracking down on that sorta thing by the way what year is the b model zx9 cheers troy

for the guy,i can't find the thread 01 02 tokico gsxr 1000 calipers bolt straight up -you said you just bought a track bike and thought the nissan brakes were crap