This winter i plan on tearing the shee down for a complete rebuild and i plan on moving up to a 4mil cub motor but im not really sure what i need. I want to get somewhere around 80-100hp on pump gas. Im new to this so any advice is appreciated i need some info on carb sizes,domes,exhaust,porting, and clutch and tranny mods to make sure it holds up. as far as riding style i do alot of open field full throttle riding and maybe a few trails but not alot so im looking for power to be focused on med-high range. Thanks in advance