ok.....i just had the hea off of my mojave(due to 25 lbs of compression).....the valves were replace by cycle works racing, lapped and asembled there.....the thing runs like a new machine...exept for the valve noise....ive adjusted them twice to spec, and it seems like evertime i take it out for an extended ride, it comes back makin noise.....and yes i am tightening the locknuts all the way......anyone have any ideas??