I'm rebuilding my neighbors lt 80 and need to know what brand piston to go with, what reed and is there a cool head available for this quad? I want to stay mostly stock or close to it.

me son raced one for years fun little bike.id go with a weisco piston,boysen reeds,and the big thing in these engines is the clutch rollers. make sure they are still round.if it need new ones buy oem and use some synthetic greese and only install 4 rollers makes it rev better and longer