Hi All, I just got my L's this week after years of putting it off. Today I put a deposit on a '93 Model ZZR250 (brought off an older mate). Bike has been rebuilt and looks the goods. All up, bike has 34,000 on ODO, but new motor has 10,000 on it (old motor dropped big end bearing because first owner had it going flat out for ages between Melbourne and Geelong). I just have a couple of questions about this bike. 1. I have heard from a few sources that the ZZR/GPX motor is notorious for knocking when first started/cold because of the crank roller bearing, is this true? I did notice it when I started the ZZR today (first start for days). 2. Once warmed up, at idle you can hear a tappet noise, but when the motor is revved this noise goes. I have also heard that this is typical of the Twin cam ZZR/GPX motors, again is this true? or should I be worried by the sound? 3. My mate serviced this bike regularly himself including relacing the oil every 2000-3000 kms. I am going to get this serviced at a bike shop, so how often should I get it serviced? Any comments/inputs would be greatly appreciated. Thanks people.