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Digital Subscriptions > Fast Bikes > 353 - June 2019 > HOW TO CHECK AND CHANGE YOUR BRAKE DISCS

HOW TO CHECK AND CHANGE YOUR BRAKE DISCS

Stopping is a pretty important part of going fast, and without some decent brake discs, you’re going to really struggle. We headed over to Black&White Bikes once again to get the lowdown on how to check your discs aren’t warped, what to do if they are, and the correct way of keeping your stopping power at its best.

Workshop

Hello and welcome to our newworkshop section. Each month we’ll be getting down and dirty, ticking ofthe servicing jobs you want to know about in a step-by-step manner

1 Find the fault

The first thing to do before taking bits apart, is finding the fault – if there is one, of course. This is important. As an example, a lot of MOTs show brake disc problems on the rollers, so we know that we can change them. Another sign of a brake being warped includes the feeling of the lever almost pushing back against your braking fingers, as the curvature of the disc pushes the pads back as it completes a cycle.

2 Identifying the issue

Now we think we’ve found a fault, it’s time to identify the issue. Even if a disc is warped by less than 1mm it will make a massive difference, so we put a dial gauge on the disc and spin the wheel. If it pushes the pin and gives a reading of movement (more than the service limit, usually around 0.3mm), the discs need to be changed. Never just change one though, always do both.

Don’t let go, Frodo.
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About Fast Bikes

Welcome to Fast Bikes Magazine In this issue: Aprilia RSV4 1100 Factory Launch Boothy went to Mugello to sample the delights of Aprilia’s new winged wonder. Sensible Sportsbikes Beano has been commuting on Ducati’s Supersport S and Suzuki’s GSX-S1000F. Triumph 765 on track We aren’t allowed to call it a Daytona 765… but everyone is. And much more!