Vespa Lambretta Scooter POLINI Timing Degree Disc Aluminium - Black

Vespa Lambretta Scooter POLINI Timing Degree Disc Aluminium - Black

POLINI degree wheel for determining the timing of all 2 and 4-stroke engines that have a crankshaft with 8,10 or 12 mm thread. This applies to all Lambretta, Vespa and automatic, whether 50-80 cc or Maxi engine.

All milling work on the cylinder ports affects the timing, i.e. how long the ports are open, and thus the engine characteristics. The more accurately the actual condition is recorded, the more precise statements can be made about changes that have been made. For this purpose and for marking the ignition timing, the degree wheel is excellently suited.

Link to Lambretta and Vespa Timing Settings http://beedspeed.com/html-pages/IgnitionTiming.htm

Basic ignition set up instructions :

• Determine Top Dead Centre (TDC) position

• Mark the position of the arrow on the fly wheel on the crankcase with a marker pen.

• Attach the degree disc and align the 0° with the marking on the crankcase.

• Mark also the desired ignition point (anticlockwise) on the crankcase, e.g. 18° before TDC for the MALOSSI 211cc cylinder.

• Remove the degree disc, start the scooter and with the help of the stroboscopic lamp, check the desired ignition marking lines up with the arrow on the flywheel. If not readjust the position of the stator plate until the correct position is found. To save time and effort during later servicing, permanently mark both the crankcase and stator plate to record their position in relation to each other.