Man...I was going to do this myself but decided to take into the dealer to adjust my 05 Wr450f valves. Said it would be $90 for one hour labor after I took the seat and tank off. Jeez...every day they couldn't get to it. I finally showed up with the bike on the rack and said I'd wait in the showroom. So a lady comes in 30 minutes later and says the guy is going to need a few more hours because they need to be adjusted. I say, "I thought all you need to do is fit the right size shims for the right clearance and that shouldn't take long." Deer in the headlights look. So guys, how long should it take the professional to adjust valves start to finish with seat and tank off. I have to head back tomorrow once again. I love 20 minutes away!