I'm second owner of my M3W; registered May 12 and bought Dec 14. It was been back to MMC for the 2014 upgrades but otherwise the full service record shows no other work. There are many detail changes made by the first owner but none appear to relate to reliability.
I have had two FOS flat tyres, both due to poor fitting of the inner-tube; the first within 50 miles of my collecting the beast! I now carry a small scissor jack and wheel chocks to help me find the perforation site; you need to put this at the bottom of the tyre before injecting the "get-you-home" goo - not much help if the fault is with the inner-tube but try rolling even a light M3W around on gravel and a slight slope!
The M3W has now covered over 18,000 miles. This has included touring Spain (previous owner) and long and many short journeys in my ownership including a classic rally to Eire. I have had to replace the rectifier but otherwise I have had no problems. The rear drive sprocket is original and whilst there is some wear it is doing well.
We all talk about the problems, so that others may avoid them, but I'm happy with mine.
