Re: noob to the motorized bicycle scene
If you follow the kit instructions and use 16:1, it will continue to be a pig. Change to a ratio of 32:1 for break in. 16:1 is simply too much oil for the engine to ever run right.
I have used 40:1 for many many years even during break-in and have never had any problems.
Just use a good quality two-stroke oil. (NOT MARINE)
If more is better, then too much is just enough.
If you can't afford it, build it yourself.