hey, i have a knock off 150 4 stroke bike htat ive had as sort of a back up fun bike. and the clutches slip really bad at first, but then as i warm it up more and more and ride it a littel bit they go back to almost normal. i'm thinking its probably my oil, im running 10 w -30 is that not appropriate for the weather? i live in maine, and it has been hovering just above freezing on average. thanks.