My son bought a Johny Pag spyder used,1400 miles. Yesterday it got stuck in 2nd gear and won't come out. The clutch cable works. What could he look for. I believe he took the cover plate off but doesn't see anything wrong.

Order a new one. Make sure it's the right one . There is 2 different models of them youll want the one without the treaded bolt holes and also has countersunk holes that go in about 1/2" so the gear plate can sit flush against it. I got mine from motoboss on ebay

Check clutch switch may be stuck bike thinks you are putting in gear without pulling clutch

check oil!, use hd oil it is great oil for v twins

pull out the cup holder just a head of the shifter you will find the shift cables at the shifter end see if they are poped off there

Start with inspecting the clutch handle for any obstructions or rust.
Lubricate the clutch cable at the handle.
Follow the cable down and look for and pinching or damage.If you can follow the end of the cable to the actuall clutch mecaniism, inspect the area for clearance.
If you can disconnect the cable from the clutch mecanisim and test the clutch handle to see if the cable moves freely.
Manually try to engange an clucth with the engine off.
If it won't move, time to diassemble the clutch.

Please dont be offended but i ride and know a clutch should last for many many more miles. Have you properly adjusted it. If im not mistaken its a mechanical clutch and its easely adjusted at the cable. Good luck

From what you're describing - you're definitely going to replace the clutch disc. If it was slipping as bad as you're indicating then additional damage could have been done to the flywheel, slave cylinder or master cylinder. The extent of the damage (present or not) won't be visible until the transmission is removed to examine the clutch disk/pressure plate, etc.

Good Luck.