Just wondering if anyone has any info on what a big bore kit will do for a 2008 yz450f, im thinking about doing one over the winter to get some more power on the cheap as opposed to the whole head work, cams etc. I currently have a DRD full system and rejetted carb, but looking for more Ummph while going down the straights getting blown by the new 09 hondas while racing supermoto like im standing still. need some more power and not a new bike. any thoughts as to what size bb - no stroker though. I want to keep it simple.