The previous owner had changed all the IACV hoses so I am guessing they won't be the problem but I'll check them anyway although when I got both my Sprints the IACV hoses were jiggered and the bikes had no problem with starting, just popped and farted a lot. I'm getting the feeling that it's more to do with not enough fuel or not enough air is getting through to the cylinders at the first attempt to start so either the IACV valve isn't opening (although I'm pretty sure that should light the engine management light), Hmm, when I think about it, I think my Yellow sprint wouldn't run right once I sorted the IACV hoses until I then replaced the stepper motor as, although it appeared to be working, I don't think it was opening far enough.