I have a 2019 king quad 500. Oh dummy didnt know the gas in my dads garage was old and topped the quad off. My daughter went back to riding it and came back a minute later saying it was jerking. I rode it and the throttle response qas going in and out, so i shut it down. Today i syphoned the gas and put 2 gallons in. It turns over, but will not start. Whats next on my agenda? And im trying to find what i did with the manual during the move.

 

Manual will tell you to take it to a dealer. Usually with an EFI Suzuki, dirt gets into the injector. Remove injector, blow out with compressed air, put back and performance is instantly restored. If that doesn't work, try a new plug. If the EFI light is flashing you have an electronic fault, so experts only to cure that. Really dirty fuel and you need to change the fuel filter. Rear plastics off, tank off, and out with the fuel pump assembly. Suzuki used to want you to buy a new assembly, but have relented, and you can now get filters, they just make it awkward to fit one.

 

I'd try a shot of starter fluid. Agree it sounds like it is starved for fuel and not something else. If the start fluid gets it to fire up, you've confirmed it's a fuel starved issue and can focus there.