1980 185s missing like crazy please help

[mike65201]

need some input, i have a 1980 honda 185s and the other day it wouldnt start. messed with it for a while pulled the plug and it was fouled. cleaned plug till wouldnt start. pulled the plug fouled again. looked like there was no gap so i gapped it and it started. but it is missing like crazy could it be i just need a new plug? i dunno please give me some input. thanks

[Lukeatc185]

mine misses alot until i give it some throttle and it clears up. if yours does not id try a new plug first.