Pick your mix. 32:1 is 32 parts fuel to 1 part oil, 40:1 is 40 parts fuel to 1 part oil. The best oil is the one you can get for a reasonable cost because everybody else will have their own idea of what is better.
my 2003 rm 100 is vibrating way too much. you can feel it if you put your hand on the transmission. it also makes a humming sound out of the muffler now. does anyone know what could be wrong? thanks
remove your mag cover and check the crank bearings by tring to move the fly wheel up and down and front to aft any precivable movement is bad and will be time to change crank bearings if that is not it check your clutch basket for broken fingers