Topic: 93' Nighthawk 750 wont crank

[Racedude]

just bought...charged battery and wont crank with button. headlight goes out when switch is activated. starter is good and cranks when directly powered up. ive heard clutch switch/neutral start or maybe a diode? lights and horn work and sidestand is up. tried pulling in clutch same thing, neutral light does not come on either. any help is appreciated bike has sat for 3 years

[Mr. Mike]

Is this a new battery? If not, start by replacing it.
If it is, pull the plugs, put the bike in fourth gear and see if you can spin the rear wheel by hand. Your answer will show itself quick.
If the pistons are stuck from sitting, with plugs out, squirt some marvel mystery oil into the cylinders and let it sit overnight.
Place a rag over the plug holes and see if you can rock or then spin the rear wheel while in fourth gear. If it breaks free, crank it with the button to spit out most of the marvel oil, then clean up the old plugs (if they don’t look wasted) and put them in. Change oil and filter, then see if it’ll start (or try to) using the button. Start there and let us know your progress.

[Don R]

 The neutral light may be a clue. I'm not sure how the wiring works in that one but find a diagram and follow the wires. I'd probably hot wire the coils and jump the solenoid to get it running, but I'm impatient.