Hello,

i have a '87 Xr600 and the front brake seems a bit poor, done everyhting i csn to improve it including a wavy disc but still to great, anyone out htere done any brake upgrade from kits or other bikes that work well, id like to retain the forks "IF" i can as i have some motard rims and hubs made up for it and but changing the forks means id have to change this lot too (spindle sizes etc)

help?

thanks


Owen
:bonk:

What exactly have you done? have you got a braided brake line and oversize disk kit?

hello, standard line, new pads, good fluid, armstrong wavy disc but still a pretty poor brake, disc is standard size wavy by the way.

was thinking of a big disc but thought that this may not help massivily as its still pad contact surface that counts

what have you done and what year is yours?

owen

Mines a 94 600R, over sized will help a lot not because of the pad bite area but because there is extra leverage on to the wheels that's where the advantage is... also a braided line will help greatly, it'll wont expand under pressure like the old stocker...

Trust me my mate from work did this to his XR650R and he said the brakes are 200% better than stock

Brumby Boy said:

:thumbsup: My 650 has a EBC oversized,WOW what a difference!

An oversized disk will definetelly make a difference.
You'll just have to get a rellocation bracket for your caliber also.

You need a 320mm disc, relocation bracket (usually comes with the 320mm disc), braided steel line, new pads to go with the new disc and some fresh DOT 4/5 fluid and you'll be doin' stoppies before you know it. :ride: :cheers:

Btw, it's not just the pad contact patch that affects your braking ability, it's the amount of surface area of the whole disc ... the bigger the disc the better it dissipates heat and prevents fading.

OWEN THE FLAPJACK said:

ACTUALLY its leverage that counts! thats why the larger diameter of a rotor moves the clamping force of the caliper outwards thus making it easier to stop with less effort. further the rotor is out from center rotating point makes the same amount of clamping force do more. The wavy disc's werent really designed for surface area but to move air thru there and have it help cool the pads and not overheat, a solid rotor actually gives more constant pad to rotor surface area but the wavys cool so much more that they work as good as a full rotor.

i would get a SS front line, and if that doesnt show some more power up front then maybe its possible your master cylinder is a tad wore out and needs replaced, TONS of front brake MC's on ebay too.