Hi Peeps.
Seems Yamaha can't or won't fix this issue that plagues many models old & new.
I've found the machining clearances within Blue Spot calipers to be excessive, allowing cold pad chatter, no improvement under thermal expansion as the pad to caliper tolerances are way to large, under riding condition the pads clatter around within the caliper giving a loud click upon brake application as the front pads rotate around the single pad pin & smash into the caliper, this excessive tolerance can also cause a noticeable brake judder, this gets even worse with age & use as the caliper wears.
Rear calipers also suffer from pad rattle, but to a lesser degree.
After some trial & error & testing various ideas, I've found a permanent cure.
It's a simple solution to a PITA rattle that can plague just about any bike caliper.
It involves fabrication of 4 front shims, it's not too difficult a job, just a bit time consuming.
Pad edges need a bit of fettling to square them up.
Parts required:
0.5mm stainless sheet.
Scriber or sharp pick tool.
Quality aviation style tin snips or a plasma cutter.
Selections of files.
Vernier.
Centre punch & hammer.
Drill / drill bits.
Sanding block.
400 grit wet n dry paper.
Vice.
Lots of patience.
Stool, it's a long winded job & your back will thank you for it.
Pics show end result of shims & modified rattle springs which can be a proper mare to install, 2 pad pins make it a simpler process, strong thumbs help no end.
