Introduction:

The PAMCO Hall Effect Ignition system is a direct replacement for the points plate and points cam system on a Yamaha XS650. It can also be installed in later models of the XS650 that have a factory TCI system by installing the complete mechanical advance mechanism.

The system requires the use of a dual output coil, similar to the MikesXS model #17-6903 or #17-6822. The stock coil in the TCI equipped models may be retained when installing this system.

Installation:

It is recommended that the advance rod and centrifugal unit be serviced prior to installing this system.

1. Remove the gas tank.
2. Remove the two ignition coils and condensers in a ‘71 to ‘79 model.
3. Disconnect the plug from the TCI on a ’80 to ’84 model.
4. Install MikesXS coil, or use the stock coil on ’80 to ’83 models.
5. Connect the Red/White wire from the wiring harness (switched battery) to either terminal on the coil.
6. Remove the points cam, points plate, points, condenser and wiring.
7. Install the PAMCO replacement plate with the two hold down screws.
8. Route the wiring harness from the replacement plate to coil.
9. Connect the wires from the harness :
10. Red wire to battery connection on coil. Or to other Red / White wire
11. Green wire to the other coil terminal
12. No other wires should be connected to the green wire terminal.
13. Black wire to a good frame ground.

Note: You must ground the black wire to a good frame ground. The ground on the plate is not reliable while setting the timing.

 



14. Install the "rotor" on the advance rod shaft.
15. Install the large washer and low profile nut with the lock washer.

17. Hold the nut on the advance mechanism firmly when tightening the nut on the "rotor".

18. Remove the access cover to the alternator.

Reinstall the gas tank and proceed as follows to set the timing. A strobe type timing light is required to set the timing.

1. Loosen the hold down screws on the plate.
2. Rotate the plate to position the hold down screws at the mid point of the upper slot.
3. Tighten the upper hold down screw.
4. Connect the timing light. Note that with a dual output coil, some timing lights may be erratic due to the fact that there are opposite "polarities" in the plug wires. If the timing light is erratic, then clip on to the opposite plug.
5. Start the engine and immediately shine the beam on the timing mark on the alternator rotor.
6. The strobe should illuminate the timing mark when it is between the two marks labeled "F".
7. If necessary, loosen the hold down screw on the plate and rotate the plate clockwise to advance the timing and counter clockwise to retard the timing.
8. Tighten both hold down screws securing the plate.