Installing the PAMCO CB750, 500, 550, 400F and 350F Ignition
These instructions are for the model with two 2 foot cables and 3 wires each: Red, Black and Green
1. Remove the points plate and advance mechanism.
2. Remove the points cam from the advance mechanism. On some models of the advance mechanism, it is necessary to remove the weights as the points cam has a flange on the bottom.
3. Reinstall the weights if removed in step 2.
4. Apply a light coating of grease on the advancer shaft.
Note: On some advancers there is a small pin located on the shaft of the advancer. If you have this pin on your advancer, follow these instructions:
1. Check for
the pin and if there grind off with small grinding tool or file. If
necessary clean with WD-40 to remove metal particles then apply
light oil to prevent rust.
2. Apply a light coating of grease on the advancer shaft.
3. Once the rotor is bolted to advancer check for free movement and spring return.
1. Place the rotor on a flat surface.
2. Place the PAMCO plate on the rotor.
3. Hold the weights in the extended position and insert the tabs on the weights into the slots of the PAMCO rotor.
4. The rotor can engage the tabs on the weights in one of two ways. This is the preferred way.
6. Install the PAMCO plate and rotor in place of the points plate with the upper mounting screw in the center of its slot, as shown.
2. The black wire from both cables of the PAMCO is connected to the frame.
3. The green wire from one of the cables is connected to the 1 - 4 coil. (blue wire) located in the vicinity of the rear brake light switch connections.
4. The green wire from the other cable is connected to the 2 - 3 coil (yellow wire) located in the vicinity of the rear brake light switch connections.
5. The engine should start at this point. If it does not, turn off the ignition switch and verify which set of cylinders is associated with which color wire per step 4, above.
6. You can rotate the crank with a wrench on the nut that secures the PAMCO rotor to position the timing marks for either 1-4 or 2-3 cylinders. Note the position of the trigger magnet (step 4, above).
7. After you have started the engine, use a timing light connected to cylinder #4 and look in the hole on the top of the plate to see where the timing is.
8. Loosen the mounting screws for the plate and rotate it clockwise to retard the timing or counterclockwise to advance the timing.
9. For the CB750 model, set the timing at the "F" mark at
1000 RPM and then check for max advance at 2500 RPM. Other models please
consult your service manual for the correct timing.
10. Secure the mounting screws.