Join Date: Oct 2006
Location: Green Bay, Wisconsin, USA
Make: GL1500 SE
Dead battery or poor connection. When you push the button there is enough "juice" to pull the piston in the solenoid in. As soon as it tries to engage the starter that is too much. Voltage drops. The piston returns home and voltage rises. Repeat, repeat, repeat. That is the buzz. The piston is chattering. Make sure the battery is fully charged and good. Make sure all connection to the solenoid are good. Both the cable connections and the small wires.
Worked on the "big rigs" for 45 years now just riding my Wing whenever I can. Gets cold in Wisconsin.