I know the sound your talking about, almost like it's some animal but it's not it. This is the timing chain tensioner sound when it goes bad in the attached link (note when on the bike it's not as loud because of the panels still being on the bike and your helmet) I replaced my tensioner myself which solved it for a few thousand miles.In very cold weather when I first start out the scooter makes some HORRIBLE sounding noises and there is a lot of vibration. This goes away once it warms up. I don't think it has anything to do with the cam chain tensioner, though... I suspect it is in the CVT itself and once everything is warmed up it operates normally again. It is just very unnerving when you first start out on a cold morning. I just take it easy for the first few miles until everything is warmed up to proper operating temperature.
My hypothesis is that in the very cold weather, the CVT belt isn't as "sticky" as it is when it is warm. Also, the metal pulleys "shrink" when cold and expand when warm. What this implies to me is that the godawful noise and vibration is caused by the ice cold CVT belt slipping on the pulleys until they both warm up and engage properly.
In very cold weather when I first start out the scooter makes some HORRIBLE sounding noises and there is a lot of vibration. This goes away once it warms up. I don't think it has anything to do with the cam chain tensioner, though... I suspect it is in the CVT itself and once everything is warmed up it operates normally again. It is just very unnerving when you first start out on a cold morning. I just take it easy for the first few miles until everything is warmed up to proper operating temperature.
My hypothesis is that in the very cold weather, the CVT belt isn't as "sticky" as it is when it is warm. Also, the metal pulleys "shrink" when cold and expand when warm. What this implies to me is that the godawful noise and vibration is caused by the ice cold CVT belt slipping on the pulleys until they both warm up and engage properly.
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