I currently have a Kawi KLX 300 with all the mods done to make it somewhat fast enough but I think I want a bike with more power. My buddy wants to sell me his 00' 426 and I have ridden it a few times and man it has way more POWER! I just don't know if I put a heavier flywheel on it, adjust the suspension etc.. if it will be any good in the mountains? I'm 5'10 170 and I'm also not too sure if maybe it is too much bike? Any help would be great, thanks.