My 90 T2 vert makes a clunk noise occasioanlly whilst braking. I'm pretty sure the noise is coming from the front right caliper, I can also feel a light thump through the brake pedal when I hear the noise. I have taken a look at the caliper and cannot see anything visibly wrong. The braking power does not feel reduced before or after the clunk.

Any idea what could be causing this?

Thanks

 

ABS pump.

Mine does that also.

If you don't have ABS, look at the caliper and make sure that the piston is moving freely.

If it does have ABS, your pump is porbably on its way out.

Mine is leaking and just doesn't work.

^
This makes me sad.