[jkv357]

Most likely the idle mixture needs richening.

There should be 2 screw on the side of the carb - 1 for idle speed (inline with the slide, and just below it. All it does is lift the slide as you turn it in) and one for idle mixture. On most Honda carbs (Keihins) the mixture screw is an air-bleed - not a fuel-bleed. An air-bleed screw is usually a lot farther back on the carb than a fuel-bleed screw.

To richen the mixture on a carb with an air-bleed, you turn the screw IN - closing off the air passage and richening the mixture. 1 to 1 1/2 turns out should be in the ballpark. Most come about 2 1/2 turns out from the factory (lean).

If that doesn't cure the problem, next thing to do would be pull the slides and move the clip on the needle (assuming it has an adjustable needle). You would move the clip DOWN to raise the needle and let more fuel flow at the same slide opening.

Just grab the filter bolt with a vicegrips and spin it out, then buy a new one.

Also - gas with Ethanol (E10) will make a perfectly-adjusted carb run lean, and will make a lean-adjusted (factory) carb worse.


Jay