I bought a brand new 2006 head with valves and cams from ebay for my 02 last year. Seller said the recall was done. I bought an hourmeter after an estimated 20 hours, and it shows 26 hours by now. So I'm assuming that the bike has an estimated 45-50 hours. We're mostly riding tight motocross track. I checked the valves today and they are extremely tight. 0.07 for intake and 0.08 for exhaust. Is this normal for 50 hrs? isn't it a bit early? What about Yamaha reliability? I'm going to re-shim the valves this week. Should I buy new valve and spring set and change after a few adjustments?