I bought an 06 cbr1000 about 3 weeks ago. The bike is in excellent shape and was 100% stock. 3700 miles, bought new in march of 07. I got it home and changed the oil with maxima blend 10w40, 300 miles later the clutch is slipping so bad its barely ridable. I ordered a new clutch and will be changing it wensday hopefully. Its seems rare to me for a clutch to go out at 4k miles on a street bike. Do you think it could have been the oil or a problem with the clutch. The dealer said honda will not cover it under warranty unless it was a defect.