Magneto

check the gap, turn the engine over slowly until the contacts are seen to be fully open, and insert a feeler gauge between the contacts.

The correct gap setting is 0.014"—0.016".

If the gap is correct, the gauge should be a sliding fit. (Make sure the gauge is clean and oil free before use.)

To adjust the gap, keep the engine in the position giving maximum contact opening and slacken the screws securing the fixed contact plate. Adjust the position of the plate until the gap is set to the thickness of the gauge, and tighten the securing screws.

MAGNETO MODELS Electrical Equipment

Lucas electrical equipment is fitted and this comprises three independent electrical circuits, as follows: (1) IGNITION—Magneto, High-tension wires, Sparking plug and Cutout switch. (2) CHARGING—Dynamo compensated voltage control unit and Battery. (3) LIGHTING AND ACCESSORIES—Lamps, Horn, Switches and Wiring. To remove contact breaker. Take out the hexagon-headed screw from the centre of the contact breaker, then pull the assembly off the tapered shaft. When refitting, ensure the projecting key on the assembly engages with the keyway cut in the armature shaft. Incorrect assembly will affect ignition timing. Adjustment every 3,000 miles. Remove the contact breaker cover and turn the engine until the contact points are fully opened. Check the gap with a gauge having a thickness of .012" (spanner 015023 has a gauge of this thickness as an integral part of it). If the setting is correct the gauge should he a sliding fit, but if the gap varies appreciably from the gauge it should be adjusted by releasing the fixed contact plate securing screw and using a screwdriver. Cleaning every 5,000 to 6,000 miles. Take off the contact breaker cover and remove the contact breaker. If the contact points are burned or blackened, clean them with a fine carborundum stone or with very fine emery cloth, and afterwards wipe away any dust or dirt with a petrolmoistened cloth. After replacing the contact breaker check the point gap and, if necessary, re-set it.

Remove the high tension pick-up (held by swinging spring clip), wipe clean and polish with a fine dry cloth. The high tension pick-up brush must move freely in its holder.

If it is dirty, clean with a cloth moistened with petrol.

On the SR-1 magneto fitted to all 1957 Touring models, the contact breaker is exposed by removing the moulded end cover secured with 3 captive screws.

To remove the contact breaker lever, slacken the nut securing the end of the contact breaker spring which is slotted to permit easy withdrawal of the moving contact lever.

If dirty, oily or burnt, contact points must be cleaned with a fine car