Hello. My Name is Michael and I'm a little new to the snowmobile community. I was recently gifted with a 98 ZR 500 and there are a few things that could use some work. #1 - there is a rattling noise coming from the clutch area, very very faint when idling but as the throttle is pushed it gets louder till about 6000 rpm and stops. #2 - Blue smoke from the exhaust about 60% of the time when riding. #3 - Speedometer doesn't work. #4 - Sometimes it has a slight lag from 5000 rpm till a little over 6000 rpm. It doesn't do it all the time though. #5 - Is it normal for the rpms to get between 4000-4500 before the clutch engages or could that be related to the previously mentioned clutch problem? Thank you for any and all help!