I'm not quite clear here on your problem. is your plug soaked in gas and 2stroke oil or is there trans oil in there? no need to split any cases unless there is trans oil in the crank chamber. and I agree very much with you HAVE to get a proper puller 15 bucks on ebay. or maybe your local dealer. but if you performed a successful leakdown there should be no way to have any oil in the crank chamber, and your crank seals should be good too if you didn't lose any pressure.
