Hi folks, I would greatly appreciate any suggestions and/or advice in regard to the following: I recently started my 2002 Suzuki GSXR-600 last night after a period of several weeks. Despite letting it warm up appropriately etc, it sounded lumpy and was misfiring as I rode it gently down to the servo to put some air in the tyres and fill it with fresh fuel (BP Ultimate Premium Unleaded). On the way home it still ran roughly for part of the way, then suddenly seemed to kick into life and was the same old bike that I've known and loved etc. This morning on the 40km commute to work it ran just fine. However, when I went to leave work this afternoon it was slightly difficult to start, and all the way home and since it is running rough again. It cut out on me at the lights twice and basically sounds and feels a lot like my old Kawasaki ZZR 250 - down on power, sounds lumpy/tinny and as though it's not running on all 4 cylinders. Does anyone have any idea what the problem may be? Could it be a bad batch of fuel? Fouled plugs? Clogged filters? In dire need of a service and tune??? I'm planning to book it in to my usual mechanic soon, but in the meantime the suspense is killing me!!! Cheers, Weasel :biker: "I feel the need.... the need for speed!"