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Three things to start with. First, make sure the float level isn't set too low, which will result in not enough gas in the bowl. Also, check the compression release linkage & the cam in the carburetor. If the cam in the fuel bowl isn't adjusted right, it'll hold the needle valve partly closed, resulting in a lack of fuel. Second, just soaking doesn't necessarily clean out all the passages. You need to make sure that you can blow air through all the passages. Aerosol carburetor cleaner is good for checking that passages are clear. Third, make sure you don't have a vacuum leak in the manifold or where the carburetor connects to the mainfold. A vacuum leak after the carburetor will require that the mixture coming out of the carburetor be excessively rick to compensate for the extra air. Drilling the jet would be the last thing I'd do, and I'd make sure I could get a replacement before I touched the original one. These are an oddball carburetor, and I've never tried to buy parts for mine. By the way, my WD-6 requires choke to fire, but then runs fine without choke once its turning over. Keith
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