[cbarrow]

I've got an intermittent wheel vibration on the front wheels. Only happens some of the time (so not a wheel weight missing etc). I also suspect I may have a slightly warped disc (sometimes a bit of vibration on braking). Is it worth relubing the caliper pins to make sure they slide freely (since the problem only appears occasionally) or is this a waste of time and effort?! Grateful for any advice.