is the choke working properly?
does the choke kill the motor when hot?
whats your plug colour. does it look lean?
what is the condition of carb ?[could be badly worn throttle slide]
going from 68 pilot to 52 is now going to make the bike much harder to start.
maybe your clamp on airfilter and porting requires richer jetting
the 68 pilot could have been fitted to mask a lean condition ,witch could be caused by a worn or dirty badly jetted carb or a air leak in motor [a leakdown test would be needed ]
when i am starting mine from cold i have the throttle closed, choke out, i only work the throttle when i give it a few primer kicks,
the choke seems to work properly,i have tried another identical carb off of 1 of my other machines and had the exact same results,so that would eliminate the carb being worn or the choke not working.
its hard to tell the plug color,i have done the WOT plug chops and have that dialed in,so i guess the plug looks normal,but the 2 stroke oil may give mixed results?
that is what i ma saying,i have gone from a 68 to a 52 on the pilot with all the increments inbetween,with almost the same results
Do you get a full kick , with the K5 motor in the 3 wheeler frame ? you may need quite a few primer kicks. CBX
yes i get a full kick,and im 6'3 240 lbs so there is some ass behund it as well