Ok i got a clone 6.5 i removed the govener put 18 lbs springs in atermarket airfilter 15 inch single stage open pipe going to get a rvl silencer now for the ? as fare as timing is it alright to get a 8 deg advance timeing key & also jet on the carb a 90 or a 92 and lastly emultion tube stay with what i have or go with the 5.5 tube im not trying to build a fast screamer just a little more power and reliability thats all thanks for any advice Dave