Hi All just new to ZXR'S and this forum
So I have bought a ZXR 400 L9 with 531 miles on the clock, It has been sitting in the showroom of a racepaint company for 16 years and hasn't been ridden in that time.
So about me, I do most jobs on my bikes the only thing i won't touch is gearboxes
The last carb bike I had was a Honda Nc29 years ago.
So far I have
cleaned inside of the tank
cleaned carbs ( air compressor and brake cleaner )
set idle to 2.5 turns out ( same as it was )
new plugs
new oil
new coolant
new air filter
The bike struggles up until about 5-6k then comes to life, and if you take it to redline it with backfire.
Now im not familiar with these bikes atall so if there any common symptoms I have mentioned? If so any help would be much appreciated.
Thanks all
Reggie
ZXR 400 Rough below 5-6k boggy + backfire any ideas?
Moderator: Moderators
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- Posts: 6
- Joined: Mon Jun 19, 2017 7:33 pm
- My Bike: zxr 400 l9
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- Posts: 6
- Joined: Mon Jun 19, 2017 7:33 pm
- My Bike: zxr 400 l9
Re: ZXR 400 Rough below 5-6k boggy + backfire any ideas?
to add to this sorry
I can't seem to get the choke to work properly, if I put it full on the bike will cut out.
Also sometimes the revs will hang around 2.5k then drop back down
Thanks
I can't seem to get the choke to work properly, if I put it full on the bike will cut out.
Also sometimes the revs will hang around 2.5k then drop back down
Thanks
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- L-plate hell
- Posts: 479
- Joined: Sun Oct 12, 2008 11:12 am
- My Bike: ZXR400 L4, ZX6R F1 track
- Location: Chesterfield
Re: ZXR 400 Rough below 5-6k boggy + backfire any ideas?
When you say set idle do you mean the idle mixture screws?
If so, the original settings for these were 1.75 turns out so try that and see if it helps
If so, the original settings for these were 1.75 turns out so try that and see if it helps
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- Posts: 6
- Joined: Mon Jun 19, 2017 7:33 pm
- My Bike: zxr 400 l9
Re: ZXR 400 Rough below 5-6k boggy + backfire any ideas?
LP
Thanks will give that ago. If that don't work I will have to have the carbs off again I think and double check everything
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- Posts: 6
- Joined: Mon Jun 19, 2017 7:33 pm
- My Bike: zxr 400 l9
Re: ZXR 400 Rough below 5-6k boggy + backfire any ideas?
Tried 1.75turns still the same. It's almost like it's running on 3 untill 6k+rpm
You guys think carbs or coils?
You guys think carbs or coils?
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- L-plate hell
- Posts: 479
- Joined: Sun Oct 12, 2008 11:12 am
- My Bike: ZXR400 L4, ZX6R F1 track
- Location: Chesterfield
Re: ZXR 400 Rough below 5-6k boggy + backfire any ideas?
Blocked pilot jet?
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- Posts: 6
- Joined: Mon Jun 19, 2017 7:33 pm
- My Bike: zxr 400 l9
Re: ZXR 400 Rough below 5-6k boggy + backfire any ideas?
so nearly sorted it
These carbs have been sitting so long I think the o rings on the pilot screws are done.
Also a pilot screw is bent as well as a needle having bad corrosion.
Where is the best place to buy rebuild kits and jets etc?
Thanks guys
- Miles
- zxr400 oc member
- Posts: 503
- Joined: Wed Apr 30, 2008 11:00 pm
- My Bike: ZXR 400 L3
- Location: Bangor, Northern Ireland
Re: ZXR 400 Rough below 5-6k boggy + backfire any ideas?
I would say your carb o-rings have dried out from lack of use.
I'd recommend a seal kit from lite tek and new needles from kwak
I'd recommend a seal kit from lite tek and new needles from kwak
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- Posts: 6
- Joined: Mon Jun 19, 2017 7:33 pm
- My Bike: zxr 400 l9