New here, please be gentle. Bought a 1978 Sachs Surburban, cranking over and running fine until about a week ago. Went over original schematic which showed 3 wires coming out of the magneto, the magneto on this one has 5 wires and the green wire for the front/rear brakes was loose and hanging detached from the terminal block, have those reattached now and the last time it started all lights including brake lights were functioning as they should.
The guy I bought it from said it might be a carburetor issue, has an aftermarket carburetor on (pics attached). The engine did get a 70cc bore and piston and there's currently no air filter on it. Didn't stop it from starting up previously. There is confirmed spark, gas tank is full, petcock works and fuel is flowing. He said the compression lever is working fine and I've checked the bottom float and the transmission for proper movement and transmission fluid.
Any ideas to get this running again? I'm going to try removing all wiring from the terminal block except essential like kill switch just to see if I can get it to crank over. Only 636 miles on the odometer.