Magneto magnet wont turn!!

Discussion in 'Electrical' started by adam.mahmoud, Jan 15, 2015.

  1. adam.mahmoud

    adam.mahmoud New Member

    Hi everyone,
    Im quite new to motorized bicycles and today when i was riding my 49cc 2 stroke up a big hill it seemed to be fine and then as I reached the top the engine just wouldn't start. As I have had magneto problems before I decided to pop of the cover and see if there was anything visually wrong with it. It all looked fine until I turned the pedal and the magnet wouldn't turn! I would like to be able to start riding agin soon so it would be great if anyone could help!!!

    Many Thanks

    Adam Mahmoud

  2. dougsr.874

    dougsr.874 Active Member

    The magnet is attached to the end of the need to determine if the piston is going up & down...if it is then the keyway on the magnet sheared....if piston is not moving then you have a major problem...
  3. Purple Haze

    Purple Haze Active Member

    Sometimes the woodruff key isn't installed properly. Remove the magnet and see if the key is stuck on the magnet somewhere. They are a bugger to install properly in the groove, because it's a magnet and the key is steel. Lots of people glue the key into the groove on the shaft with super glue, then install the magnet. Then, check the air-gap between the magnet and coil. The magnet may be hitting due to clearance issues. Hope this helps.