Brake disc thickness

[Millietant]

just a quick question - the front discs on our Fazer 600 (15,500 miles) for all intents and purposes look brand new.


The bike hasn't been ridden hard, the pads are original and hardly worn and the brakes work perfectly.


BUT, when I put my digital vernier caliper on them today they both measured (within 0.05mm) 4mm thick. Checking in my Haynes manual, it lists the disc thickness as 5mm New with a minimum service limit of 4.5mm.


The rear disc is 4.97mm thick, with the same 5mm new, 4.5mm minimum limits listed in the Haynes.


I've never ever had a set of discs wear out on me in 45 years of riding (with a number of my bikes reaching +70k miles) and my FJ 12 discs were still perfectly in spec after 75k miles.


Is the info in the Haynes manual wrong? Or do I have a real problem with the front discs on the 600 ?

[Millietant]

Please everyone......just ignore my last post !!!!!


Just realised I was looking in my Fazer 1000 manual. The 600 manual says they're 4mm new with a service limit of 3.5mm.


I'm officially an idiot, or old, or both !! 

[Gnasher]

Please everyone......just ignore my last post !!!!!


Just realised I was looking in my Fazer 1000 manual. The 600 manual says they're 4mm new with a service limit of 3.5mm.


I'm officially an idiot, or old, or both !! 

That will be it mate 

Aftermarket pads can destroy discs in quick time, some of the worst are EBC in my experience.  The best pads are OE but at £40 odd it puts people off but they work better and last longer, if their too rich for you I'd recommend SBS.

Obviously if your heavy braking all the time, even OE will cause accelerated wear.   

[Millietant]

I think I'm generally very light braker Gnash, the pads that are in are still virtually new too, hardly any wear on them at all.


Like
Y many tens of thousands of miles left in both pads and discs !

[BBROWN1664]

Please everyone......just ignore my last post !!!!!


Just realised I was looking in my Fazer 1000 manual. The 600 manual says they're 4mm new with a service limit of 3.5mm.


I'm officially an idiot, or old, or both !! 

Yep, Yamaha manual (in downloads) says this

Brake disc thickness limit
(minimum)
Front: 3.5 mm
Rear: 4.5 mm