There's a recall out on the 400s made between 2008-2012 - possible problems with the reg/rec circuit board.
I've been on the suzuki site to check the vin and mine (a 2011 bike) is included

On well, I'm getting new tyres fitted in a couple of days so I'll talk to the guys about it then. Also the 14500 mile service is getting close so it's looking like an expensive year for me!
Apologies if it's already been posted...
Nic x