I have had this bike for 12 years.. I rebuilt the top end with a new rebore about 30K miles ago. It had stock pistons.. I never noticed, but there were no washers, the thick $15 ones (HD p/n 16482-85) under all the head bolts... I put it together without them.. The exposed head bolts on the left side were recessed.. I never paid it no mind.. I am rebuilding it again due to a worn crankpin and rear base gasket leak and after looking in the HD parts catalog I saw that they show the washers being necessary.. I looked at other evo's and saw that the head bolts on the left side were flush, not recessed.. they had the washers.. I had the engine all togeather, but took the top end off again, got the washers.. when I go to assemble it and drop the bolts on without turning them, I see there is about 1/4" of tightening room between the bottom edge of the bellshaped head bolt and the contact washer .. is this normal?? Any input would be apperciated.. I am trying to get this bike done and have been working hard on it for the last few months.. Thanks.