Hi all, im looking to buy a 660x next month, and I wondered if there is a post on here with a bit of insider knowledge?

ie is there a particular single year or age I should avoid due to an issue with XYZ (gearbox, engine...)?

people seem to sell with the "much needed fuel mod" and talk of twitchy low speed issues - is this age of model related or all 660's?

last question! what is the difference between an X and R? is it just nobbly tyres or is there a whole change in suspension, steering rake that sort of thing? Im not going to off road, just hoon around europe.

Thanks in advance!