Ignition -POLINI digital inner rotor- Vespa PK XL

For the first time Polini offers with its digital racing ignition a real alternative to the Vespatronic ignitions, which have been on the market for some time now: in contrast to the Vespatronic, no conventional ignition from the automatic range has been adapted here, but a completely cast base plate has been used. The very light flywheel, weighing only 1100 grams, carries an easily exchangeable plastic fan with optimized blade wheel geometry. The blades have been designed to provide sufficient cooling air to the cylinder even at the usual high rpm of a racing engine.the special feature of the Polini ignition that distinguishes it from all the other versions on the market is its digital module with four different ignition timing curves programmed into it that can be accessed through two DIP switches, giving the possibility to adjust the ignition timing according to the engine characteristics.

Two-stroke-typically, a large pre-ignition value is started which is then reduced with increasing engine speed and power.

The entire adjustment range corresponds to max. 10° KW (MAP 4).

The following ranges are available:

• MAP1 (both switches in off position):Rated power between 9000-10000 rpm
• MAP2 (switch 1 on, switch 2 off): Rated power between 8000-9500 rpm
• MAP3 (switch 1 off, switch 2 on): Nominal power between 7500-8500 rpm
• MAP4 (both switches in position on): Nominal power between 11000-12000 rpm

The pre-ignition is set to 23°, measured at 4500 rpm.

This corresponds to 2.6mm at 51mm stroke, for the shaft used by Polini for the diaphragm controlled EVO cylinder kit with 52.8mm stroke this is 2.7mm before top dead center. The distance between the ignition and the polewheel as well as the pick-up has to be calibrated individually on each engine. Minor modifications to the engine housing are necessary. The details can be found in the enclosed manual.

Real High End ignition which requires attention to detail during assembly, but is also a solid and reliable basis for real racing engines.

Suitable for engines with 20mm alternator cone.

NOTE: Requires a pole wheel puller M22x1,5mm (see accessories).

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