Mine is twin disc and it's rock solid! Incidentally I don't know if any of you guys have ever tried Armstrong racing pads? I bought a set off e-bay when I was pissed thinking they were EBC, whereas the advert clearly stated same fitment as EBC .... They are actually pretty dandy pads. They are probably three decades old and no longer available, but I have to admit to thinking that they are pretty hot. They're probably really soft and won't last five minutes but they sure stop the Old Gurl
I s'pose single discs are OK if you ride like James May

Praps our hero, Pigiron, uses his iron like a boat anchor to stop

Ralph Ferrand
Z1000A1 (1977), Z1300A5 (1983), Z900A4 (1976) GPZ1100 Unitrak (1983)(project), RD250B (1975)(project), ZRX1200R (2005) DT175MX (1981) YZF R6 (1999)
http://www.bikerstoolbox.co.uk