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i have a 1986 honda 200 sx. it runs for about 5-10 minutes then when i hit the throttle it acts like it is starving for gas. i pull the choke quick and i can run it. if i push the choke back in it will run fine for about another 5 - 10 minutes. i have cleaned the carb about 3 times. i am getting gas to the carb but i can't figure out why it runs like this.
it will start on the first pull everytime. so it is worth fixing. please help
 

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does it have a vent tube or a switch on the gas cap? if switch make sure it is in the on position, if vent tube make sure it is clear.
 

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Agree^^^^^^^^^^
 

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Discussion Starter #7
i have also replaced gas cap and ran without cap just to make sure no vapor lock. but no go.
 

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Is anything aftermarket? Sounds like a jetting issue.
 

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On the end of the float needle is a rubbery nipple if it is worn it will allow fuel to trickle in while you are riding or even parked when you activate the choke you are compensating for the fuel/air mixture. sometimes cleaning won't help try a kit they are not that expensive.
 

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i have a 1986 honda 200 sx. it runs for about 5-10 minutes then when i hit the throttle it acts like it is starving for gas. i pull the choke quick and i can run it. if i push the choke back in it will run fine for about another 5 - 10 minutes. i have cleaned the carb about 3 times. i am getting gas to the carb but i can't figure out why it runs like this.
it will start on the first pull everytime. so it is worth fixing. please help
If you've checked all of the fuel filters (only should be one? But someone may have added another?) and know for a fact the fuel flow is fine? If this engine has the fuel valve vacuum? Check the rubber hose going from the fuel valve for any cracks. If you see any? Replace the vacuum hose. But I'm not sure if you have this or not.

One thing you can check is the slide inside of the carb itself. The rubber diaphragm could have a split or small hole in it. You'll have to disconnect the throttle cabel, then the top of the carb so you can pull this slide I'm talking about out so you can look at this rubber.

Once it's removed look at it using a bright light to see if you notice any dry rot cracks or holes. 1986 is a 23 year old engine, and these things usually go south about then. So it's not uncommon for this to happen. If you see any hole no matter how small, replace the slide assy.
 
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