1977 Honda CB750F update 5

After driving out the old guides, I needed to install the new bronze guides. First, I measured them to make sure they were within .001 in. The procedure is pretty simple- Put the head in the oven at 300deg F and put the guides in the freezer. After the head is all warmed up (30 min) put it on the bench and dip the ends of the guides in some oil before knocking them in with a drift. Make sure the drift is sized right (6mm) so you don’t round over or mushroom the ends of the guides. They actually tap in pretty easy. As you can see, my freezer and oven get used for projects as well as kitchen duties!

Next, we need to lap in the valves before installing the springs.

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