Cheers Bergs, I may take you up on that
Seriously though, I know the motor is the best it can be given the litany of horrors. I never thrash the beastie, and always listening out for different sounds, etc. As for screw/bolt threads, etc, yes you could end up spending £££££s, like the sump stud, but it's very satisfying to find a cost free solution. As we've said before, this engine would have been recycled into drinks cans years ago BUT, it's still on the road.
I must admit, I have been surprised at how much maintenance has been needed. To say I've had nothing but trouble with this bike isn't short of the truth. Alongside the two engine builds (or 1.5 if you consider RM's attempt), there's been 5 ATDs, a maggie replacement, the cush drive spacer + new chain + fettling, fitting the spin-on filter, endless checking the sump gauze for bits of engine, dodgy electrics, broken rocker oil pipe, leaky fork seals, sloppy centre stand, broken side stand, constant oil leaks, losing nuts and bolts, clutch nut coming loose, broken dynamo chain,etc, etc, and this isn't to mention the routine maintenance like valve clearances, chain tensioning, and trying to get parts to fit when they don't want to, etc, etc.
The most reliable thing on the bike has been the wheels and brakes - requiring virtually no maintenance at all.
Still, for some very, very odd reason, I still like fixing it.