I bought a Cylmer repair man. for my 85 lt250r. It says to use 20w40 oil in the crankcase? What is the right oil to use? I talked to my local zuki dealer and he said he uses 10w40 in his 2 strokes. I want it to be right so what do I use. Also the manual says to run the quad for 5-10min and open the oil filler plug to check oil. It says oil sould overflow out or it needs more oil. Ive never heard of checking oil this way. Anybody who know how to check and what to fill it with please give me some advice. As it sits I can't see any oil after running it for 5-10 min.