I recently ended up with a jawa transistor 40, I know everyone on here tends to give the Soviet bikes a bad rap but I thought I was up for a challenge. Anyway when I first got the bike pedalling would result in the lights flickering and the engine starting to turn over without sparking.
After researching online and doing some multimeter testing I decided that the big red "tranzimo" unit was toast. I picked up the newer Hungarian unit and matching stator ring off from treats and swapped them. Now when I either pedal or hook up the generator to a drill I get no lights and no power off the magneto.
Any Jawa experts have any ideas? I'm contemplating just making an e-bike out of it.