Ive heard alot of good stuff about Amsoil being a really good oil. Is this what I want to use or is there something else. I use yamalube but I've noticed that sometimes it doesnt want to go into gear or it slips outta gear. I want something to help it shift maybe smoother

Amsoil

 

I use it in my KTM and have no complaints.

 

Its very good oil, but its not a wrench. If its slipping out of gear...oil isnt the problem.