Yep - the OE discs are sourced in CHINA. My source tells me they are very likely machined on a lathe, not ground on a bed. Poor material (all castings from scrap rather than ore), technique, tooling and operator training (source not my words) means excess pressure on the cutting tool will create the 'waving' and wedge shaping. So it's likely the replacement discs will be the same unless they have fired the buyer and/or re-sourced. Don't get me started on using a low cost labour source and selling in a high margin market!
I have bought a pair of discs off E Bay. Steel (they will rust - that's OK I've owned lots of Guzzi's!) but cut from the billet (not roll), supported between the bolt centres and nickel plated (today). I e mailed the seller before I bought (£145 inc. postage) to check they would be OK for sintered pads and he confirmed. They are on the bike and so far smooth brakiing!!!!
And the final irony - the manufacturer is located in Shilton, near Coventry, about 5 miles fron the Triumph plant. JMJ Engineering 024 76621107/
jim_meek@btinternet.com
