Chassis electrical system

[forchetto]

I need new magneto for my bike.... Some proposition?

Try this place :

http://www.china-parts.co.uk/acatalo..._Flywheel.html

You'll only need the stator assembly unless your rotor has been de-magnetised. It has been known to happen, sometimes just dropping it on the floor does it, or heating it with a blowtorch to help removal, etc. A demagnetised rotor makes starting very difficult and lowers the overall power output of the magneto.

One way to test both the output of the high tension coil winding, (the one responsible for the ignition system), and the effectiveness of the magnetic field of the rotor is to disconnect the usually black-red wire and connect a transparent gas discharge tube of the type often used in spark arrester protection in telephone lines, etc with about a 90 volt rating, between this wire and chassis. Kick over the engine and observe the blue spark through the transparent glass of the tube. This tells us that at the very least 90 volts are being generated by the coil at kickstart speeds.
The use of a digital voltmeter in place of the discharge tube is fraught with difficulties. Those meters don't respond quickly enough to get a reading.
An analogue meter will put a too high a load on the (high impedance) winding, leading to low readings.

Here's a tool set-up to do this:



You might get a lot of help on this site dedicated to Skyjet bikes exclusively, there's also a list of dealers. One of them must have the stator and other bits.:

http://www.freewebs.com/skyjetowners/