Howdy. My 2005 VTR250 has just started backfiring at start up. It's just the one "BANG!", (sounds like gunshot, and scares the bejeezus out of me and any poor Nana who happens to be walking by with her shopping trolley), and is not happening during riding. Otherwise the bike is running nicely. It has done under 2000km with a full service history, (ie. had it's 1000km and technically not due now until, I think, 6000km. Also, I get a bit of squeaking on the front brake at time. Nothing dramatic. I got told that was pretty normal. Is that true? Any opinions from you folks out there??