1. Remove your existing ignition system and remove any old gasket or sealing compound from the machined face at the back of the timing case.

2. Turn the shaft of your magneto until the “dot” on the shaft is at the  top and in line with the timing hole blanking plug.  (Figure 1.)

3. Remove the stainless blanking plug and insert the timing rod through the magneto body and the hole in the shaft.  You may have to turn the shaft slightly to align the hole.  Ensure that the timing rod has passed through the shaft and into the magneto body below. (Figure 2.)

4. Fit the “O” ring to the annulus machined in the magneto flange.  A smear of grease will help to seal and keep the joint in place. (Figure 2.)

5. Fit the magneto in place on the three studs.  The fixing holes are slotted to allow minor adjustments to be made to your ignition timing without any dismantling.  We suggest that you set the holes to the centre of the slots before tightening.

6. Set your engine to your required number of degrees or distance before top dead centre on the compression stroke.  (Easy check for compression stroke.  Both valves will be closed.) (Figure 3.)

7. Fit your timing pinion and tighten the nut.  We recommend 15 ft-lbs if you have a torque wrench. (Figure 4.)

8. Remove the timing rod and fit the stainless blanking plug.  Set plug gap to manufacturers recommendations.

9. Refit your timing cover and any other parts you may have removed.  Set spark plugs to 0.018 - 0.020" (0.46 -0.5 mm).

10. Check to make sure you have removed the timing rod before starting your engine.

Wrong ignition timing can affect performance or damage your engine.  Use of a stroboscope where available is recommended for maximum accuracy.