In this video a method is shown to remove the old and install new tappet guide bushings from a 2 cylinder engine.

The new bushings with an outer diameter of 24.97 mm have an interference fit with the crankcase.

After installation, the bushings ID needs to be reamed / honed to give a tappet clearance of 0.02 – 0.04 mm

Click this image to watch the video on Youtube:











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