84 200s, need some help

[packhamstruck]

I sold my 85 big red 250, the other night, and the next day came across a 1984 Honda big red 200s, just had $1000 into the motor, the trike looked rough but new it would run cause I saw it out on the trails, i brought it home, my dad gave me trailprotrailprotrailprotrailpro for buying another trike already, and it will run great for about 20 min and then foul the plug, I have broke the pull cord twice it has so much compression, but when it runs it seems really rich, and the choke is mest up, any ideas on what else to do, we made the choke permenitly off, also it will not ideal

[smokinp]

If it is a big red then it would be a es not a "s".My 200 was doin the same thing and i adjusted the the needle and set it up so that it gets less gas.Try cleaning the carb,it might have dirt in it.