Probably starter solenoid switch
Dead battery? Loose or dirty battery cables? Bad starter solenoid? Bad starter? Neutral switch?
Check the battery cables or starter.
Voltage Regulator?
Seized engine Discharged battery Loose or corroded battery cables Starter or starter solenoid Neutral safety switch
Weak battery? Loose or corroded battery cables? Starter solenoid? Starter? Neutral Switch?
Dead battery? Loose or corroded battery cables? Bad starter? Bad starter solenoid? Bad neutral Switch?
Seized engine? Loose or corroded battery cables? Weak or dead battery? Bad starter solenoid? Bad starter? Bad clutch or neutral safety switch? Bad ignition switch?
Double check the battery cables at the battery and at the engine, be sure they are clean and tight.
Seized engine? Weak or dead battery? Loose or corroded battery cables? Dead spot on starter? Bad starter? Bad starter solenoid? Bad neutral or clutch safety switch?
Engine seized? Dead battery? Loose or corroded battery cables? Bad starter? Bad starter solenoid? Bad neutral or clutch safety switch?
Weak battery Bad starter Loose or corroded battery cables Bad neutral switch
Check for: weak battery Loose or corroded battery cables Loose wire on starter Bad starter Bad starter solenoid Bad neutral safety switch