I have a 90 kdx 200 and it has been starting fine until I changed the the oil in the trans . I'm not sure what was in it but iput 10 40w back in it and that is when the problems start. It would skip once in a while but it just got cold here in the am and it did it even worse. then this morning it was 30 degress out and i couldn't get it to catch at all. when I finally got it started I rode fore 45 min and when I shut it of it engauged just fine every time . should I run 10 30w or someone on here said they use atf will that work?when it is warm it is fine and when it is cold it skips .? please help.