I have an kawasaki zzr 400 which when i try to start it does nothing, but when i cross over the solenoid with a peice of wire to test it the bike starts up. Its just the start button wont work? Any help would be great!!

Check the induction coil and measure the current output(consumed for producing the sparks. Also since you must be having an electrical starter & your battery may be low on charge! Also get the wiring replaced as a precaution, since the battery-to motor plus from coil to plug. The rectifier charges the battery when not driving during night. Since this is a regular occurrence, the rectifier check should be last on the priority list................................sodeep

Check to see that you have power to your starter switch. Double check your sidestand safety switch. I would expect the bike to NOT start if the sidestand switch was malfunctioning but it is possible this bike could be wired to only interrupt the starter.

To see if you have power and ground to your starter switch, use a multi meter. Take the switch apart and check for 12v on one of the leads. Then on the other lead check to see that you have a ground connection. Finally, check the switch itself for continuity.