I picked another banshee up in a trade recently. Needed a bunch of stuff so I've been fixing it over the past 2 months. Finally took it on its maiden voyage and the motor locked up. It has a mild port work. Question is can I put a 4 mill crank in with it already being ported or do I have to put a stock stroke crank in it? Not sure if porting has to be done specifically for the stroke or not. Thanks for any help