ZZR400 turning but not firing

U may have got some bad gas maybe with water in it. Check with service station to see if anyone else had a problem that day. This happen to me a few years ago and service station paid for my repair.

I have a kawasaki kx450 2007. I was out riding a

Anti-theft system has nothing to do with it . Battery cables , maybe , Park neutral safety switch possibly ! With anti-theft system problem you wouldn't a click or anything , that is if the anti-theft disables fuel or the starter . Plus the SECURITY light would be on if it were a anti-theft system problem . Your best bet , take it to a qualified repair shop that knows how to do starter circuit testing >
Starter Voltage Drop
How to voltage drop test starter motor circuit

And what's this identity anti theft system ? No such thing ! The vehicle has a content theft an vehicle theft deterrent system !
This system disables fuel not cranking of the engine. The VCM/PCM will not disable the fuel due to any BCM message for the remainder of the ignition cycle.
If the VCM/PCM does not receive the same password from the BCM as the last learned one, the vehicle will start and then stalls due to the Fuel Lockout.

flassed less engine power wth????????? Flashed reduced engine power ! Electronic throttle control problem ! Your best bet ,take it to a GM dealer , buick , cadillac , GMC . You do not have diagnostic test equipment or knowledge to even diagnose this.

tune up,fuel filter,air filter.

The cables may just need to be cleaned real good or the ground wire from the battery to the fender wall may be loose or broken.

this could be an ignition module problem.next time it happens you need to check if it has spark at the spark plug let me know cheers!

Could be the fuel pump. Try hitting the bottom of the fuel tank a few times while someone try's to start it, if it starts then the pump is on it's way out.

Its Starter relay may be causing main problem. You can try Yezdis starter relay as it can help you solving your problem

check starter solenoid.see if getting power to starter side when pressing button .if yes check if power to starter w/ test light when pressing button.if power there check starter,also motor, will it turn manually or is it seized.if no power to starter side of solenoid, jump across solenoid posts w/ a large screwdriver -motor will probaly turn over,w/ key on.if small wire to solenoid has power when pressing start,solenoid bad,if no power, wiring or start button bad.