I'm braking in a65cc. engine for a speck bike and I've come to the realization that its a bushing engine and doesn't have crank bearings just bushings. That would leed me to believe that it needs more oil. Its almost through its B/in at 16 to one . I've been using Itasca 2 cycle oil that comes 8oz to the bottle and mixed with one gallon of gas is 16 to one. What ratio should it run after the B/in period? I have some synthetic oil that comes in 3.2 oz's and mixed with a gal. would make 40 to 1 so two of them would be 20 to one. After Augie showed me how to set the carb. it runs real good at 16 to one so 20 to one wouldn't be out of the question.What do you all think? The kit didn't come with any paperwork for some reason so I'm not even sure whats recomended. I've been doing the B/in slow and easy but I've noticed the little engine has lots of spunk and think it should run pretty strong when all's said and done. Well its back to the streets for a run to kill off the last of the second tank full..........Tom in W.V.