this is the problem. I can get the bike running with the choke on but it does stay running when i give it throttle or take off choke in either setting and will not start with choke off. the history of the bike is as such. when i bought it i run it for a season with a eradic idle. I took the carbs apart and found that the main idle carb on the left was missing the main primary chrome jet needle. So i put the needle in and then reset the mixture screw back to factory specs according to the manual-1-3/8 turns out. Has anyone dealt with this situation or can recommend some tips. it runs shortly before puttering out.