Front sprocket nut needs to be upgraded to 12mm from 9mm if not already done, quite an important mod as there have been quite a few bikes with issues in the past. If it's been done it'll be flush to the end of the thread like in the photo.
http://foc-u.co.uk/index.php/topic,9329.25.htmlThey can suffer from cam chain rattle as well (like a sewing machine noise).
I've had my cam chain replaced at 40,000 miles and it'll still rattle when cold on start up, but totally disappear when the oil is warmed up after about 5mins in cold weather. You'll know if it's worn or not 'cos the noise will drive you nuts after a while. Most people get it sorted, others on here have left it alone, but there's lots of info on here if you do a search.
If you have original black exhaust downpipes then they maybe worth checking for rust or holes, they're notorious for it.
Headlights aren't great, so check on here about the headlight mod, it's a must.
Well worth investing in a K&N air filter if it doesn't already have one, they're worth every penny (from Ebay)
Other than those few, they're pretty damn good as bikes go, so just slowly work your way through the obvious minor service stuff if you don't have any history and fire away with any questions on here,we're quite a helpful bunch of foccers.
As for buying stuff, Wemoto, M&P, Busters, AJ Sutton, and obviously Ebay are the main places to buy from, and there's also a For Sale/Wanted section on here as well.
If you have a bike, put the year on your profile to make things easier for us to work out as there are differences between years, and give us a hint at mileage for technical questions.
http://foc-u.co.uk/?topic=34.0