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Timing the CB750F/K 70 thru 77  (may or may not apply to other models)    Main Parts Page

Tools:  This timing light is inexpensive and works well, $12.  You also need a Phillips-head screwdriver.

Lift the seat and place the positive lead (red) on the positive (+) battery terminal.
Disregard the impactor, that's its home.
Next...

Attach the negative lead (black) to a good ground.  This is the one I use.

Now, attach the plug lead...

to the middle of the spring (comes with timing light), and insert it into the #1 or #4 plug wire (I use #1).  Attach the spring to the plug.

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Sohc Honda CB750 ignition timing, sohc, Honda Motorcycle, SOHC CB750, CB750K, CB750F, sohc4, sohc4 cb750, ignition timing