Hi Steve I've just signed up with the Group! My name's Leon, residing in East Sussex and I have a Suzuki 400 an Y (2001) have not had it long as it's a replacement for the Sv I had which had to go. Wanted something more practicle for round the city.
Cheers mateNot familiar with the 400 Burgmans, mine are 650's. I'm sure someone will be along with some advice they seem pretty good at that, lol. 19 year old, has it run OK up too now or has it clattered since you bought it. It would probably help if the guys knew what you have done already. So it's making the clattering noise when stood still. The battery was down, maybe, and I'm just guessing here, there is something wrong with the stator. Where is noise coming from and is it charging, do you know how to check?
Try posting the above in the 400 Burgman section, or maybe one of the mods could move the relevant bits for you.