The reason it won’t seal is because something is distorted from being over torqued. Take a flat file and pass it across the intake on the cylinder. This is most likely the problem. Keep taking passes until the surface is flat. Make sure you don’t get any chips in the cylinder. You can do this by coating the intake ports with a thin layer of grease and stuffing it with a towel. Next, lap your reed cage. This can be done by passing the flat surface of the cage over a piece of 220 grit sandpaper with some WD-40 on it over a flat surface. Use a figure 8 motion while lapping. A kitchen counter top will work fine. Once you have both surfaces flat, use an anaerobic sealer like 1194, 1104, 1184 (Three Bond) or Yamabond. DON’T USE SILICONE!!!!! Gas will destroy rubber every time. Spread a THIN even coat on the cylinder and install a NEW gasket. Spread another coat on the other side of the gasket and install the reed cage and intake boot. If it still leaks, you need a new reed cage and / or intake boot.
