I don't think u r addressing the problem but you go ahead and listen to him.........34 degrees with 92 octane is good, u shouldn't have a problem there.............6-8 degrees advancing the cam without seeing your cam card that could make it even more of a dog..normally advancing the valve timing will increase your cylinder pressure with both valve opening earlier and will increase bottom end and mids but will also decrease top end power loss of rpm's in top end power..well u might not have pv clearance( as advancing your cam u will change your pv clearance) and all that is going to do is compound with your problem.......... valve lash is recommended by the manufacture for a reason. as far as more lash i see what he is thinking but not going to do u any good( if i remember right loose valve lash loose is suppose to give u more bottom end or torque or tighter valve lash is suppose to give u more top end hp...correct me if i am wrong)..the heads r to big the gears r to small and the carb is not right for the application......then do your tuning but u know about advice its free.....if u had a 210cc head the motor would be way more repondsive