Guys in my 07 which I had head work and a woods cam I ran st 60 wt always. One time they were out of 60 wt and I went with 20/50. during skill practice were we run our bikes hot with the 20/50 I was having trouble with restart, Never happened with the 60 wt. Now my Question is with the oil cooler in the 2011 103 should I use the 60 wt or the 20/50, I live in Miami 90* everyday. In a couple of weeks Ill have to make a decision, thanks allot guys do we have any Amsoil experts on here.