when i had my vario 160, my personal riding feeling after each impian fully MB oil change, around 800-1,000km i can feel its no shiok liao...

my take is vario 160 1 cyclinder unlike those 3 or 4 pot share to run a bike. what i do is to keep up with the warranty, in between booklet intervals, i buy and change myself.
Gear oil no need change so often, but i change it during every oil change. i will buka and clean the CVT and sametime change oil and gear oil one go....