Join Date: Feb 2010
Location: Maleny, Queensland, Australia
Front Brake Discs Warping
Why oh why are the front brake discs repeatedly warping on my 05 650?
I'm on the third set (original + 2 different manufacturers) and the latest set have only done 15,000km and like the 2 previous sets are now showing 18-20" runout as measured by dial gauge ( the manual specifies 12 thou max). They don't pulse through the lever or show up at speed but are most irritating when coming to a stop as they grab/ release of their own accord.
Adapter brackets from Svracing (not Vstroma as I first posted) were fitted soon after buying the bike new and Tokico 4 piston calipers were installed, but as the same calipers and discs are fitted to Vees they should not be causing warpage.
4 brands of pad have been tried along with vigorous scrubbing of the discs to remove any residue but have had no effect on the problem.
The bike has now done 115,900km and I have been so happy otherwise it was going to be a keeper but the irritation level with the bike over the brakes is increasing.
What to do? Keep buying discs every couple of years - cheaper than buying another bike and having to set it up. Ditch the 4 piston calipers and use the 2 piston originals with new discs and put up with lower braking safety in the hope it fixes the problem?
2005 DL 650 - 118,500km
1972 Suzuki T350 - about 105,000 miles (including 2 Castrol 6 Hour Races)
1982 Honda CX500EC - 260,500km
All owned from new
Last edited by joethebike; 05-06-2019 at 01:14 AM.