hi sktp,,do it once,do it well,,replace the cam chain and tentioners ,,at least hone and rering the bores,ide go for a rebore but the money is up to you,the head is off so, ,dont get it ported ,,but clean up factory mis castings for want of a better word,reseat the valves(grind) and valve guide seals of course,your doing the right thing in your choice of tools,,also get a telescopic magnet,so cheap,so handy!you dont want it to be a hotrod motor so if your cam is good stay with it,plan A quickly becomes plan B once you start modifying things,,although any factory improvements should be done now,,do those carbs,,and replace those jis bolts with allen key stainless ,this bike is your daily driver and not a toy like most of ours here,good luck and happy new year!!!