zxr400 will crank but not start

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danni22041990
Posts: 5
Joined: Wed Feb 01, 2017 12:15 pm
My Bike: zxr400 L3

zxr400 will crank but not start

Post by danni22041990 »

Hi all,

so basically my bike will crank over but not fire up....

here is what I have checked:
- Spark plugs/HT leads spark
- relay works
- fuel pump works
- carbs clean and no blockages
- fuel getting through to carbs

what I haven't checked
- compression
- battery life (picking a tricle charger up later as heard weak battery charge can make this happen)

so those two are getting worked on at the weekend, but just curious what everyone thinks....

it all happened a week ago the seals went on the needle seats so I replaced those along with some other parts while I was there bike still would fire up (this happened before I replaced the Orings, hence why I replaced them thought it was a fuelling issue) however doesn't appear to be a fuel problem and fuel appears to be doing what it should as it keep flooding my engine because the bike wont fire and my plugs end up wet and fouled.

However the battery is dead from trying to start it so we had it hooked up to a car battery still no luck would just turn over.

we tried to bump it (which worked it did fire to life) BUT it was as if I was running on one cylinder and had ZERO throttle response!!
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banner001
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Track day God
Posts: 2548
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: zxr400 will crank but not start

Post by banner001 »

did you check the float heights once you replaced the o-rings?

could be that they are now incorrectly adjusted.

did it ever fire up and run perfectly?
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
danni22041990
Posts: 5
Joined: Wed Feb 01, 2017 12:15 pm
My Bike: zxr400 L3

Re: zxr400 will crank but not start

Post by danni22041990 »

HI Yes double checked everything seems to be just fine.

Has previously ran but this problem occurred about a week ago so hence taking carbs out etc then still same problem with them back in. I'm thinking dodgy battery of HT lead so going to double check the spark later on
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