I have a puch m50 sport, electrics were virtually the same as the maxi but magneto spins anti clockwise tho.
ive fitted a powerdynamo electric system - pic of parts below
and the instructions page is here
main page here
and I want to get a tacho to work with this. they cant recommend much, ive tried a few cheapos off ebay and none work. the inductive one I bought only alters every 4 seconds
so can anyone recommend something that should work. im in the uk. im told some german ones costing 100 euros could work but its a lot of money to risk.