zx10r 04/05 starting problems

[FATBOY RACING]

Hi all,a newbie to your forum from the uk with a race bike with a starting problem.

two weeks ago i booked a day on track to give my newly built racebike a shakedown,got to the circuit and the bike started the bike but it was missfiring and spluttering,i changed the fuel and tried starting but this time the bike wouldnt even fire up....so.....i got home changed the injectors and plugs after hours and hours of scratching my head,and it fired up but only fired on three cylinders ....hours went by trying to solve the problem.....i then changed the main loom, ecu and ignition barrell and key and she fired up a treat and sounded sweet.

after getting the bike started i replaced the plugs with irridium ones and booked another trackday, i loaded the bike into the van ready for the next day at the circuit.

i arrived at the circuit got the bike from the van,turned the ignition on flicked the kill switch down hit the start button and she roared into life,i switched her off pushed her into the garage where i tried starting again...........nothing, back to how she was a week ago, just cranking over.?
the bike has now had two looms,ecu's,ignition barells,fuel pumps,tilt switches,kill switches, sets of plugs and injectors,injector harness.
dis-conected and reconected PC111,new fuel,checked fuses & earth straps,fault codes showing are butterfly exhaust valve. and thats it.the sidestand switch has been bridged and the speed sensor and butterfly valve removed.

WHY START RUN FINE THEN NOT.

its staring me in the face i know but just cant see it.

ANYONE ?

many thanks, frustraighted from the uk

[bgmagma10]

Is it turning just not firing? I don't think you would but do you still have a kickstand? Make sure when you turn the key the fuel pump primes.. I had a problem with my ignition and when I would turn my key on it would prime the fuel pump. Worth a try.

[El Zilcho]

Air pressure sensor acting up?

[FATBOY RACING]

Hi many thanks for your replies,

The fuel pump primes and i can see a petrol vapour in the throttle bodies when the engine is cranked and smell fuel ive tested the plugs and there is a spark.

surley if it was a sensor be it sidestand or air pressure sensor at fault it would show when i check the engine diagnostic for fault codes

it ran fine over a couple of days,it ran when i put it in the van in ran when i took it out the van but seconds later it refused to start,

[bgmagma10]

Man.....I got nothin..

[FATBOY RACING]

After trying two of everything its somthing else on the bike telling the ecu not to start but its somthing not as a fault

its not the cam or crank sensor as that would show as a fault,the only thing i havnt changed is the wiring harness at the headstock the coil stick harness or the coil sticks.

it cant be the coil sticks as that wouldnt force a total shutdown i would start but run poorly.

ive got a coil stick harness on order,its a case of changing what i can to eliminate it from being faulty.

[-Op-]

try push starting it by putting it in gear, turn on the key, start running until you get moving decently quick, dump the clutch out for a quick second and pull the clutch right back in and stop the bike. Be VERY VERY VERY careful if you do this because if you are not quick as hell with the clutch, the bike can just take off from you and you end up with a crashed bike. I have done it personally, quite a few times, and it still racks my nerves, but necessity is the mother of invention right?

My other question about it is about the starter, its possible that the starter is not strong enough to actually start the motor, but can still get it to crank. Its possible for 2 things, the starter is just not capable of spinning the motor fast enough to get it to start, or the starter is just not getting enough juice to start the bike.

What kind of battery are you running?

[El Zilcho]

Originally Posted by FATBOY RACING

surley if it was a sensor be it sidestand or air pressure sensor at fault it would show when i check the engine diagnostic for fault codes

Not necessarily. The ECU will only detect malfunction if the sensor's output is outside of the expected range. It may be within that range, but still be incorrect.

[kawikid511]

Originally Posted by -Op-

try push starting it by putting it in gear, turn on the key, start running until you get moving decently quick, dump the clutch out for a quick second and pull the clutch right back in and stop the bike. Be VERY VERY VERY careful if you do this because if you are not quick as hell with the clutch, the bike can just take off from you and you end up with a crashed bike. I have done it personally, quite a few times, and it still racks my nerves, but necessity is the mother of invention right?

My other question about it is about the starter, its possible that the starter is not strong enough to actually start the motor, but can still get it to crank. Its possible for 2 things, the starter is just not capable of spinning the motor fast enough to get it to start, or the starter is just not getting enough juice to start the bike.

What kind of battery are you running?

Ya definitely check the voltage off the battery mine was low but it would crank over and over just would not start replaced the battery and fired right up no problem so definitely check that out

Sent from my SAMSUNG-SGH-I897 using Motorcycle.com Free App

[hellsrazor]

Regulator/rectifier Inspection ....... 16-33 in the service manual...

17-28
Engine Doesn't Start, Starting
Difficulty:
Starter motor rotating but engine doesn't
turn over:
Immobilizer system trouble
Starter clutch trouble
Vehicle-down sensor (OFI) coming off

Poor Running at Low Speed:
Spark weak:
Battery voltage low
Spark plug dirty, broken, or maladjusted
Stick coil wiring trouble
Stick coil not in good contact
Spark plug incorrect
IC igniter in ECU trouble
Camshaft position sensor trouble
Crankshaft sensor trouble
Stick coil trouble
Immobilizer system trouble