Front Brake To High

Bodger200 · Mar 24, 2018

Hi All
I am just rebuilding my front and have now found that when the front caliper is fitted to the fork leg, only half the pad is hitting the disk. It looks like the caliper mounts are to high? The forks are 34mm and look to be the right way around as the drain screw is on the outside.
I bought the bike in bits so have never had the front end on till now, I just shaved the forks and left the mounts for the brake on.
Any advice would be great fully received
Thanks

Rasputin · Mar 24, 2018

Hi. It looks to me as though you have a wrong diameter disc. I’ll nip out and measure mine.

Rasputin · Mar 24, 2018

Measured mine. The diameter should be 295/300mm. Hope it helps.

Bodger200 · Mar 24, 2018

Thanks Rasputin
Ive just measured and mine are 260-270mm. Didn't realise they did different size disks.
Looks like I'll have to source the larger one

5twins · Mar 24, 2018

Yes, you should have a disc about 298mm in diameter. What you have there is probably the disc from an RD250/350/400 or TX/XS500.

650Skull · Mar 24, 2018

You guys in England and Europe are going to run into this problem a lot in the future, due to all the US imports and the differences between the US and European models.

That rotor is correct for the Euro 75B and 76C. Those euro models had a twin disk set up and smaller rotors were used only on the front twin disk brake set up.On these twin disk set ups the caliper mounts are lower on the forks so the pads connect fully on the smaller brake rotor

Those forks are from a euro 73TX/74TXA or from a US 74/75 model

Bodger200 · Mar 24, 2018

Thanks all for that I think the frame for mine is a euro 75b and the forks must be of off a US model.Starting to make sense now why the bike is on a Q plate (as year Unknown)
We have a large breaker near by who import a lot of US models so will go and get a larger disk. Just glad it's an easy fix

650Skull · Mar 25, 2018

These are from Brochures. can't give you a measurement. Your legs have been shaven of all brackets for the guard, top and bottom.
Note the different location of the bottom guard stays. Their placement is relevant to the caliper positioning/large or small brake rotor

Front Brake To High

Bodger200

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