I've had this 2004 z1000 since January and have been using it all the time. But only getting to know it better now the weather is improving. I've been messing, to make it handle better and pleased to say it is. Now, new problem yesterday. Under hard acceleration at around 10-11k rpm in most gears the revs go up to max out and the power dips. It feels like the back wheel is spinning but it can't be at 145mph. I thought thats what was happening under 100 but when it was still doing it at over 130 I realised something was wrong. I'm wondering if the clutch is slipping? Or maybe its just red lining in a way i've never encountered before. All in all its a great commuter but isn't turning out to be sporty enough for weekend madness. Maybe I should just get a blade or r1 or someting of that nature. Any Clues as to what it could be?