Originally Posted by jy7347
when i said i brake hard at 20kmph, i meant maybe around 60-70% braking force, hard enough to stop quick but not like a panic stop. and that's when it gives me that vibration, and the vibration feels like someone just attached a spinning motor onto my bar, it vibrates at a quite high frequency.
maybe its brakepads?
Okay, but even at 60-70% you stop pretty quickly at 15 kph, correct? A warped rotor gives that pulse feeling in the bars as the rotor rotates and the pads lose/regain contact where the rotor is bent. The faster you are going, the faster, more noticeable the pulse is. You are stopping relatively quick so there’s no time for the rotor to keep rotating with the pads losing this contact and feeling the pulse in the bars.
I don’t know what it is but it still doesn’t sound like a warped rotor to me. That being said, I know a couple who posted in this thread (Sev & GTScotand) are way more mechanical/knowledgeable than I so take what I say with a grain of salt. Having admitted this, I still don’t think it’s a warped rotor.
Good luck and let us know when you find out for sure.