I reciently welded a gear to the drive shaft in the tranny of my 98KX250. I was reving it out trying to climb a hill when I did it. I am running 10-30 just like the manual suggests. I ask the shop mechanic and he mentioned ATF, or Honda 85 Wt oil. Any recommendations? There is a Yamaha shop close, does Yamalube have a good product?
i use silkolene med comp, like 5 a quart in my yz 250, i think silkolene is the one of the best oils on the market today. any semisynthetic is good, motul i heard is really good. always stick with a medium wieght.