My kawasaki zzr 400 wont start. i changed the plugs and put in a new battery and a new regulator and the bike still wont start. only when i push the bike it starts, and after that if i switch the bike off it will start. but the next day it wont, what can cause this?
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Need to make a compression test on each cylinder in case you need a new cylinder head gasket, test the thermostat and check that the radiator fan works ok.Also after installing a new battery (which you should cause the old one will damage you regulator eventually) check that the charging system works ok.
Stock plug is NGK CR9E, but Denso Irridium IU27 is best. Cost more but better economy and starting.
Any manufacturer will have the equivalent NGK plug for your bike on their chart, with two or three types for your preferred riding style.
Cheers.
that box is called the air box, its where you engine breathes in its air. you say its leaking oil? these boxes are normally a bit oily but only really surface oil. If you can actually see liquid oil you have a problem with your petrol shut off. When the bike isnt running petrol will leak into the engine through the piston. When you start the bike all the petrol mixed with the engine oil will be pumped back into the air box. also check the level of the engine oil, if too much has been put in there then that can also be pumped back into the air box. If the petrol and oil has been mixing you must change the oil as petrol thins the oil and your bike could catch fire, the engine wear will be really bad.
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.
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