Triumph T100 motorcycle, starter solenoid clicks a lot and doesn't turn motor enough, it would start after pressing starter button for a length of time but solenoid would then break. When my original solenoid broke down a wire inside it had melted and broke. I put a new solenoid on, it worked good at first then started clicking a lot, then stuck open so when I got home and turned ignition off it wouldn't stop turning engine over, so solenoid and starter were still live. I had to disconnect battery to stop it. I put another solenoid on it and that clicked a lot then would start but that solenoid then broke.