I have changed the front master cylinder on my SR400 to one that has a brake switch as I need to have a brake switch to get a warrant. I had another front master cylinder in the shed that came off another project bike several years ago. It is made in West Germany but other than that I can't determine the make and it certainly isn't standard equipment on the XV750 I took it off so no idea where it came from.
Anyway, onto the problem. The new master cylinder installed and bled doesn't seem to want to apply enough pressure to the front pads. Now the front pads have had fork fluid over them so I have take the precaution of ordering a new set which should be here in the next day or so. But even with these pads the brakes did work before with the old master cylinder.
So I'm wondering if the new master cylinder doesn't have enough volume of push or however you measure the amount of fluid moved, or if it is buggered. Or maybe it's been sitting too long and has deteriorated some way. It locks the front up on the second pump so I'm thinking it needs more bleeding. But I've bled the reservoir empty three times and it's still the same.
Any wisdom would be appreciated, I don't want to go to the brake shop but that's the next step if I can't find a silly mistake![]()
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