fuel pump goes, but not the starter motor

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callum@93
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fuel pump goes, but not the starter motor

Post by callum@93 »

iv put the loom back into my bike, I got it all conected up and then tryed to turn the engine over from the starter button. the clock lights and fuel pump started to work but the motor did not turn the engine over. iv not had much to do with electrics so if any one has any ideas it would be a great help. Thanks
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Re: fuel pump goes, but not the starter motor

Post by CaNsA »

Did the carbs come off?
How long did you try it for?
Fuel tap turned on?
enough fuel in the tank?
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Re: fuel pump goes, but not the starter motor

Post by banner001 »

as cansa is alluding to, it can take 20-30 seconds of cranking to get the bike started with no fuel in the carbs.
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Re: fuel pump goes, but not the starter motor

Post by masterofinsanity »

but his bikes not even turning is it?
Don't forget people there is more to the zxr400 than this forum... check out www.zxrworld.co.uk also.
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Re: fuel pump goes, but not the starter motor

Post by banner001 »

whoops...sorry, read it wrong.

if you want to diagnose electrical faults you will need a multimeter, that way you can check if its a wiring fault, or a duff starter motor.
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callum@93
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Re: fuel pump goes, but not the starter motor

Post by callum@93 »

Yea the bikes not turning :( but the other stuff works. its just not turning the starter motor on the button. I know the starter motor is ok because it turns the engine over if i short the solenoid. iv also changed the solenoid becasue i had this kind of problem before so impritty sure thats ok too. its got me very confused :smt013
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Re: fuel pump goes, but not the starter motor

Post by zimm »

blimey ...

sounds like the same problem i think skullie's having with his ..

there's a relay in the fusebox (called junction box in the manual) if this dies you get everything except activation of the starter motor off the button as the bike becomes paranoid and behaves as if its in gear with the stand down and you havent pulled the clutch in. afaik its not repairable.. but a new fuse (junction) box should sort it.
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Re: fuel pump goes, but not the starter motor

Post by callum@93 »

cheers zimm il look into getting one of those naw. I was starting to run out of things to check. Would i be able to use the fuse box from any of the zxr 400s ?
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Re: fuel pump goes, but not the starter motor

Post by banner001 »

according to manual, L5 is different to L1-L4, dont know if that means L5-L9 are all the same? dont know about H models and you've not said what yours is...
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JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
callum@93
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Re: fuel pump goes, but not the starter motor

Post by callum@93 »

ok iv put a whole new loom in and checked the voltage from the battery. iv also put a new switch gear on thinking that maybe this was the problem. Iv got the loom all connected up and its doing exactly the same thing as it did with the old loom in :/ im realy running out of ideas naw
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Re: fuel pump goes, but not the starter motor

Post by Robbie »

Is the starter relay clicking when you try to turn it over?
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Re: fuel pump goes, but not the starter motor

Post by banner001 »

callum@93 wrote:ok iv put a whole new loom in and checked the voltage from the battery. iv also put a new switch gear on thinking that maybe this was the problem. Iv got the loom all connected up and its doing exactly the same thing as it did with the old loom in :/ im realy running out of ideas naw
and did you change the junction box as suggested?

there are only a few things which connect to the starter motor...
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
callum@93
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Re: fuel pump goes, but not the starter motor

Post by callum@93 »

yea, i replaced everything, i put a complete new loom in :/
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Re: fuel pump goes, but not the starter motor

Post by banner001 »

callum@93 wrote:yea, i replaced everything, i put a complete new loom in :/
have you taken a multimeter and checked all the connections coming from the battery for the ignition system?

will the bike bump start? have you considered that thestarter motor might be knackered...might be good to post a list of the things you have changed as opposed to saying "everything".
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
callum@93
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Re: fuel pump goes, but not the starter motor

Post by callum@93 »

the loom, all relays, cdi, fuse box and switch gear from another zxr but the same problem as i had before is still there. so this makes me think maybe iv got somthing in the wrong place
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