[fox128]

Hey all, newbie to the forum with a question on valves of course.....
Got a 2009 CRF 450 recently with a timbersled kit and put the wheels on to ride and thought I'd better check the valves. It has a fastheads head and stage 2 hotcam on it among other things. The intakes were right in spec at .06 and .07, but the exhaust were 2-3 thousandths too wide. Is this something I had better adjust right away? the bike runs absolutely amazing.....after I get it started which can be a real bear. I know tight intake valves can cause starting problems but don't know if loose exhaust would do the same or cause other issues. Thanks!

[Leardriver]

You should tighten those clearances up. Honda dumbed down the spec to protect people from themselves anyway.
I run my intakes at .045 and exhaust at .009. Less slamming together of the drivetrain.