Pulsating new front rotor

IT IS A FLOATING DISC to re machine a floating disc you have to remove it from the carrier and surface grind both sides take a close look at the bobbins how free they are to move
if the disc don`t float it may bind in one spot and also check weather the bobbins are clearing the caliper mouth / tips of the pads
 
Most thin motorcycle discs aren't easy to machine , on a proper brake lathe you machine both sides at the same time , but yours isn't that worn , chatter and heat are a problem , but some brake lathes have a grinding ability very light tickle with segmented stones , is it a plain iron disc , easiest to machine , not chromed, or stainless, you should send it back for a replacement. Cheers.
 
If you've reached the point at which machining is deemed necessary to rectify, then it's clearly got to go back for replacement/refund.
It's not just Wassells branded goods either.... after issues with my freshly rebuilt T160 gearbox I went through my local Triumph spares specialist's entire stock of new LF Harris gearbox cam plates with a lathe and DTI and 20% were useable. The rest were like buckled pushbike wheels.
 
In the UK, does anyone know of a double sided grinder company that can do extra large floating disc refacing, as I can’t find one??
 
if you check with RGM you will find they do not stock Girling Norton rotors ????? so is it a case of mistaken identity the plot thickens
 

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