I have a 98 zx7r and it wont start if the headlights are on, if i turn them off at the switch the bike will start but when they are on the engine will turn over but not fire.
I thought it may have been the battery so got a new one and still have tthe same problem.
The lights work before the engine is running and once the engine is running
My next thing too look at would be plugs and coil but cant really understand why it would be these since it will start without the lights on.
I have fitted a alarm to the bike recently so have cut some wires but all have been reconected and the bike was having the same problem before i fitted the alarm but not to the same extent, with the lights on the engine would take a while to fire but no it just wont fire it with the lights on.
I know it is not a big deal to have to tun the lights off to start the engine then back on again afterwards is just annoying.
Any ideas would be greatly appreciated.