hello thumper talk people! i am brand new to 4 stroke engines. i just got a 2001 yz426f. it has low compression when i bought it and needs the shims replaced. i knew this coming in. but all i traded the guy was a xbox and a tv. so i thought i would just take a chance. lol. so i looked up videos and got the manual and everything and know the clearance for the valves and mostly know how to do it. so what i am asking are what shims do i need to buy? where is the best place to get them and what is a good price for them? or just tell me some helpful information about this bike! thanks!