The only problems I had on the Black zed that 'had' to be sorted were soggy sounder and a couple of leaks, everything else i did was upgrades i wanted...pretty sure anyways.
The green one had an 'iffy' clutch master an slave but would have replaced this with a sheddist kit anyways and the srs light says hello quite frequently the now lol.
Like you say mate, I think a great deal of your problems on teh old 180 were down to the poor crash repair and if you make sure you get a good un things will be fine
