1978 CD 750 K master cylinder

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1978 CD 750 K master cylinder

brownie
I bought a 1978 Honda CB 750 K model and I had to rebuild the disc brake master cylinder. I purchased a new rebuild kit (Honda 45530-404-315) and the rebuild went well. After assembling everything I get no fluid what so ever, even with everything from the master cylinder to the caliper loose.
I see some master cylinders have two holes in the  wet well but I can only see one on mine. There is a second hole but it appears to just be a casting indentation. I cleaned it with a small bit but it does not go through.
I lightly hand honed the cylinder before I put the kit in.
I hate buying another master cylinder as they all need rebuilt.
Thank You
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Re: 1978 CD 750 K master cylinder

TOOLS1
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I would never hone an aluminum master cylinder. I wonder if debris from the homing has plugged the smaller hole? I use a small wire wheel on my Dremel tool to clean the bores on the master cylinders. The best way to bleed the brakes on motorcycles is to use a pump-type oil can. Fill the can with brake fluid, attach the hose to the open bleeder and pump the fluid up to the master cylinder.
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1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)