Ok so I'm a newb to the new fourstrokes and just picked up a 2001 YZ426 a couple days ago. I havent really gotten to ride it yet cuz its been so cold here but rode it around a little bit when I bought it. When I got the bike home I started it and let it idle. This may be normal but the valves seem like their making more noise than they should? I heard from someone that it is normal, and that these bikes won't let you start them if the valves are to far out?