This shows a good view of the fuel jet. It is apparent the setscrew was directly on the small kerf on the side of the jet. This is not advised because the setscrew will brad and restrict the size of the kerf. It is believed this kerf serves as a drain for excess fuel that may accumulate around the base of the jet.

Use a good fitting wrench and a large hammer to loosen the main bearing housing that screws into the side of the crankcase. It usually takes several strong blows to get it loose. Notice that the tank top is securely clamped to a strong worktable. Do not remove the bearing housing. It is just loosened at this step to allow for easier removal later.

Remove the 3/8" X 1-1/2" bolts that attach the tank top to the crankcase. These bolts should have a heavy lock washer behind them. Inspect for hairline cracks on both sides of the pivot bar housing. The older style tank top does not have the reinforcing gusset and many are found to contain cracks. Also check for cracks on the thin flat surfaces of the tank top near the bolt holes.