Last night I pulled the right side case cover and checked my CB drive gear on my '00 426. It was fine, not a bit loose and the retaining nut was tight. I thought for sure it was going to be loose as I was hearing chatter while starting out in 1st gear. It must just be the clutch. I also pulled the clutch out to check the basket, which is stock, and it looks almost new. So at least I checked everything out. I can live with a slight chatter. Hopefully tonight I will get everything put back together and be ready for riding this weekend. I have to say my 426 has been bulletproof. Thanks to Scott F for the CB key, which I'll save for the future, and to Hick for excellent explanations of the pocedure.