hopefully one of our resident Gas pros can help me out here. my VN has a 10 year old Sprint gas system on it. and the problem is it has troubles running on gas when its cold. i can't give it much of a bootfull either cold or hot. it has way too many flat spots. i've tried richening up the mixtures and all the simple stuff. So i'm wondering whether or not my converter is fingered

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i'll try and get photos up a little bit later today, thank you to anyone that can help. i'm sick of having it die on me before i get to the top of the hill in my street.