to answer a few of those questions...... the battery is 4.8v but fully charged, i only choke the engine on the first start of the day. the biggest problem in tuning the needle is that if i stop the engine to re-set the needle then it becomes a big problem to start it again so, i have to tune the needle while the engines running. i've gone through a wide range of needle setting,but this problem of not starting after the first start still remains. that's got me thinking that the problem is not in the needle setting.

once i took the spark plug out to see why the engine wasn't starting. the plug was dry, but there was no spark. i rinsed it with gas and still no spark, about 10 mins after rinsing it the spark plug started working. could one of the reason be that there is to much oil in the fuel? is it possible that after a while, some oil deposits on the plug stopping the spark ?maybe the castrol supper TT has to be mixed at something like 40 to 1 or 50 to 1 for it to work? or it just might be that my needle settings are all wrong and I'm very rich. in trying to figure out my max rpm i leaned my "H" all the way to 1 1/4 and even then the rpm didn't decrease. my high end rpm's are 6.66K ("H" 1 6/8)
or it could be that it's an old carb which has not been modified?