Me and my dad and his buddy went riding yesterday, excellent conditions out here in the hilltowns of western Mass just a little bumpy anyways my dad's buddy had a 2000 ZL 600 EFI. I took it for a while going down the trail. Excellent riding machine, very smooth and I loved the throttle pull and response of the 600 EFI. The only thing I hated bout this machine was the damn huge 13 gallon gas tank on it. I was like constantly sitting on the thing and it hurt going over the bumps <_< ! I can remember all the magazines complaining about this 13 gallon tank used on only the 2000 models and they were sure right about it!