If you convert your ski to premix, in addition to using more oil and spark plugs you are putting oil through the carb(s). Creating more nasty blue smoke and going back to the seventies technology . Your ratio will be more than double what you need at idle or slow speeds. Might kill some mosquitos though. Ratio with injection at idle is about 100:1, pre-mix 40:1 sheesh. When I ran two strokes I owned a total of about 24 snowmobiles and outboard motors with oil injection none failed ,but none were Kawasakis either....I have a Kawasaki ultra 150. How many ounces of oil should I mix with each gallon of gas. It has an oil pump but I just don't trust them its easier for me just to premix. It is 1176cc with 145hp. Thanks for the help!