I put an 86 200X carb, cable, and throttle assembly on my 85 200S. The only thing I had to do was remove that metal nub off the left side of the housing to get it to fit properly. MUCH better feel with the throttle, and a better response from the larger carb. Not sure if there's much difference between the carbs from the first gen 200X, and the 200s though.
This is my trike. There are many like it but this one is mine. My trike is my best friend, and it is my life. I must master it as I must master myself. My trike without me is useless. Without my trike, I am useless. I must ride my trike true. My trike and I know that what counts is not the amount of miles we ride, but the time we ride together. My trike is human in it's own ways, therefore I will learn it as my brother. I will learn it's weaknesses, it's strengths, it's parts, and it's soul.