Yeh, I started with the TG specs as well...170 main was too rich even in 100-108 temps...dropped to 168 and lost the lag in top end...now in Washington st at sea level,still not sure if I can improve on it.might try a 165 for elevation,on 2nd clip currently...I run a bp8es,which drops the electrode down into squish chamber more...an old trick that I'm not sure is relevant.Im running a fresh motor(which you know the TG specs are based on) but still dont blast thru the desert wide open all day.Boysen reeds,ProCircuit works pipe,hi flow filter...I highly recommend the jetting chart posted...it is extremely helpful.