I think im gonna go all out on my bike, i want to put a hot rods 4mm stroker crank in it but have some questions. i know i need to trench the cases for this but what does that mean? and i want to port it, but first i need to know if my 30mm carb will be enough. will rejeting be necissary. and im also thinking about some cylinder head work. but if my carb isent big enough then i dont think i will have the money. thanks