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[align=center]Sidestand, Clutch and Neutral Switch Wiring[/align]
If the engine won't crank or the engine stalls when put in gear, then this post might help.
The circuit below is a simplifed (and untangled) extract from the CBR250RR wiring diagram. It is much easier to see whats happening and how each of the signals relate to each other when isolated from the rest of the wiring.
[align=center]
[/align]
STARTING THE BIKE
To start the bike, the starter relay must have a ground path to work. It can get this if the bike is in neutral. Otherwise, the sidestand must be up and the clutch in to start it when in gear. You can see these two paths on the circuit above.
RIDING THE BIKE
The CDI needs to see ground on the G/W wire, otherwise it will stop ignition events. That means the side stand must be in the up position. If the engine cuts out when put in gear, its probably the sidestand switch and associated circuit thats faulty.
If the clutch diode fails you can get weird results. Like the neutral light coming on with the side stand down and the clutch in, through to the neutral light not working. If you need to find it for replacement or testing, it's located on the wiring harness behind the air box.
[align=center]
[/align]
[align=center]Clutch Switch...
[/align]

If the engine won't crank or the engine stalls when put in gear, then this post might help.
The circuit below is a simplifed (and untangled) extract from the CBR250RR wiring diagram. It is much easier to see whats happening and how each of the signals relate to each other when isolated from the rest of the wiring.
[align=center]

STARTING THE BIKE
To start the bike, the starter relay must have a ground path to work. It can get this if the bike is in neutral. Otherwise, the sidestand must be up and the clutch in to start it when in gear. You can see these two paths on the circuit above.
RIDING THE BIKE
The CDI needs to see ground on the G/W wire, otherwise it will stop ignition events. That means the side stand must be in the up position. If the engine cuts out when put in gear, its probably the sidestand switch and associated circuit thats faulty.
If the clutch diode fails you can get weird results. Like the neutral light coming on with the side stand down and the clutch in, through to the neutral light not working. If you need to find it for replacement or testing, it's located on the wiring harness behind the air box.
[align=center]

[align=center]Clutch Switch...
