Re setting the points gap the fixed point (i.e the one that is not the one on the spring steel arm) has two small nuts. The lower one is a locknut, the top one, when turned, moves the fixed point up or down.
Rotate the backplate until the points gap is at its widest point. Measure with a 12 thou feeler. If it needs adjusting slacken the lower locknut and screw the fixed point in or out to set the gap. Then holding that in place tighten the locknut.
nevhunter wrote:Run the engine with the cover off after setting the timing. You will only lose a small amount of oil. Move the advance-retard through full travel IF you know what to look/listen for .you do a quick but effective check that the timing is close to what works. It should hunt on full advance, and slow up considerably at full retard with stronger sound. The best way to make an adjustment is with the sprocket on the cam. It's a bigger diameter taper. The magneto is hard to stop the shaft turning when you release /tighten the nut. Holding it by the point s assembly is not advised. Never try to prise a sprocket off. Use a proper Ariel puller. The Lucas magneto-dynamo shaft is easily distorted/bent as it's way out from the support bearing and part of it is BRASS with only 2 screws through the armature to align it. Nev
john.whiting wrote:remember that you must set the timing with the engine rotating in the normal direction,to take up slack.Rotate the engine backward enough to then turn it forward enough to take up all the backlash ,or the timing will be way off.