I just bought an 84 Honda 200m. It ran amazing except for it had a high idle. My papa and I decided to clean the carburetor in it and we got the idle adjusted using the set screw and the brass adjustment screw that threads into the throttle cable cap in the top of the carb. Ever since we cleaned it, it will only run well for about 5-10 minutes until it starts to choke and hesitate when ever I give it throttle. Its like it has a rev limiter and will not let it rev up. It idles well most of the time but sometimes it slowly boggs out after a few minutes of sitting. The spark plug always comes out black. I have since cleaned the carb twice and it does not seem to help. I cant seem to figure it out but I think it is carb related because it ran well before I took the carb apart.
I am new to carburetors and a guy I talked to said some guys lose what is called the needle holder and that may be my problem? Is there a needle holder in the 200m carbs? Any input on this or any other possible problem would be greatly apreciated! Thanks