Brake discs

[Jules-C]

Most of the replacement disks are thicker than the Yamaha ones, Yamaha are I think 4.5mm but replacement ones are usually 5mm, even though they often put claims about weight saving on their websites!  Check the price of Yamaha ones they often aren't much more expensive and usually last longer.  For the difference in price and problems with refunds from China I'd stick to known brands