Fuel System

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Last post

How a ZXR400 CV Carb Works.

Last post by Dominik « Wed Apr 19, 2017 1:34 pm
Replies: 8
by banner001 » Sun Jan 24, 2016 11:57 am

Ive been meaning to put something like this on here for a while now, and now that i have the time ive decided to unleash it on you, the unsuspecting...

8 Replies

4118 Views

Last post by Dominik
Wed Apr 19, 2017 1:34 pm
Fuel System FAQ

Last post by fstarocka « Wed Sep 07, 2016 5:30 pm
Replies: 12
by banner001 » Wed Apr 16, 2014 11:55 am

Note: Ill be adding to this, and tidying it up as i go, for now this is just somewhere to dump information for the FAQ, if anybody want to add...

12 Replies

3204 Views

Last post by fstarocka
Wed Sep 07, 2016 5:30 pm
How to strip and clean your carbs

Last post by banner001 « Thu Apr 21, 2016 5:50 pm
Replies: 27
by banner001 » Thu Aug 09, 2012 7:08 pm
1

2
Stripping ZXR 400 L-model 32mm carbs a quick guide.

Time depends on how clean the carbs are, mine took me in total about 8 hours to do all 4,...
27 Replies

6480 Views

Last post by banner001
Thu Apr 21, 2016 5:50 pm
Pilot adjuster screws, final verdict

Last post by CaNsA « Tue Apr 29, 2014 6:12 pm
Replies: 14
by banner001 » Tue Apr 15, 2014 10:50 am

Dont want to start an argument, i want this to be a rational debate.

As part of the general cleanup of the site i want to lay this confusion to bed...

14 Replies

4158 Views

Last post by CaNsA
Tue Apr 29, 2014 6:12 pm
zxr400 - Fuel system

Last post by masterofinsanity « Sun Jul 15, 2012 7:45 am

by masterofinsanity » Sun Jul 15, 2012 7:45 am

H model manual
H Model Carbs H1 & J1

L model manual
L model Carbs L1-L3

0 Replies

1794 Views

Last post by masterofinsanity
Sun Jul 15, 2012 7:45 am
Fuel pump issue

Last post by banner001 « Mon Dec 10, 2018 6:28 pm
Replies: 1
by asandilands69 » Mon Dec 10, 2018 2:32 pm

Hi everyone, just need to pick your brains please! Picked up a little Christmas project non-running L1 last night. Previous owner reckons he had it...

1 Replies

28 Views

Last post by banner001
Mon Dec 10, 2018 6:28 pm
Mixture screws

Last post by Mxdeano « Thu Aug 30, 2018 6:46 pm
Replies: 4
by Mxdeano » Wed Aug 29, 2018 2:07 pm

Hi there , could someone clarify this for me , I stripped and cleaned my carbs an had a look at mixture screws I noticed that from cylinder 1-4 was...

4 Replies

1051 Views

Last post by Mxdeano
Thu Aug 30, 2018 6:46 pm
Carb leaking into engine

Last post by callum93 « Mon Jun 18, 2018 2:55 pm
Replies: 2
by zxrkawa » Wed Sep 28, 2016 1:18 pm

Hello,

I have a zxr 400 from 1992 witch is working fine except from this problem. It seems like the fuel is leaking from the carburetor into the...

2 Replies

593 Views

Last post by callum93
Mon Jun 18, 2018 2:55 pm
Want to made a carbon fiber ram air system

Last post by banner001 « Wed May 30, 2018 8:51 pm
Replies: 14
by ancozxr » Tue Oct 17, 2006 1:41 pm

Guys i need a ram air box from an H model or L model.

We try to made it with carbon fiber or carbon kevlar.

Here in Greece we dont have a ram air...

14 Replies

3060 Views

Last post by banner001
Wed May 30, 2018 8:51 pm
Carb heater fitting

Last post by banner001 « Mon May 14, 2018 2:29 pm
Replies: 1
by namtabmai » Mon May 14, 2018 8:49 am

Without going into details of what ham fisted ape did what, I've found myself with a carb heater fitting which has one of the plastic arms broken....

1 Replies

127 Views

Last post by banner001
Mon May 14, 2018 2:29 pm
Carb Balancing

Last post by Miles « Fri Feb 23, 2018 8:39 pm
Replies: 1
by viper911 » Fri Feb 23, 2018 6:20 pm

Hi All, can someone point me in the right direction to the link that explained how to balance carbs it seems to of vanished. It was a really good...

1 Replies

280 Views

Last post by Miles
Fri Feb 23, 2018 8:39 pm
fcr33 main jets,pilot jets ,needels

Last post by U_h0rnet5 « Thu Dec 28, 2017 5:28 pm
Replies: 3
by supercool7712 » Fri Jun 27, 2014 2:37 pm

hi every one,
i need help i have a set of fcr33 flat slides witch need main jets,pilot jets, air jets,needels ect,any imfo on sizes of jets needel...

3 Replies

937 Views

Last post by U_h0rnet5
Thu Dec 28, 2017 5:28 pm
L model carbs any different to h model

Last post by Zxr400paul « Tue Dec 12, 2017 9:58 pm
Replies: 3
by Zxr400paul » Mon Dec 11, 2017 9:35 pm

Hi all, was wondering if L model carbs are different to H model carbs and if they are how can you tell the difference, thanks Paul.

3 Replies

276 Views

Last post by Zxr400paul
Tue Dec 12, 2017 9:58 pm
Wet/oily spark plugs?

Last post by banner001 « Sun Dec 03, 2017 12:38 pm
Replies: 10
by Smokingviper1 » Mon Aug 28, 2017 2:25 pm

Just bought a zxr 400 L6 from a mate and it runs sweet as a nut, but there is a mysterious oil leak on front if the engine which seems to wet the...

10 Replies

689 Views

Last post by banner001
Sun Dec 03, 2017 12:38 pm
Carb diaphragms vibrating

Last post by rccaulfield « Thu Jul 27, 2017 9:08 pm
Replies: 3
by krystian579 » Sun Jul 16, 2017 8:44 am

Hi everyone, my first post on zxr world :smt001

I have a L5 which has been running a bit rough, revs kept playing up and it used to bog out on me a...

3 Replies

483 Views

Last post by rccaulfield
Thu Jul 27, 2017 9:08 pm
33mm FCR's - Bito R&D V's SP OEM

Last post by Mori Man « Wed Jul 12, 2017 4:32 am
Replies: 16
by Mori Man » Tue Aug 25, 2009 10:43 am
1

2
There was two definite differences between each of these carb's I was expecting:

1. No TPS

2. No Choke

and as suspected both these items are...
16 Replies

2264 Views

Last post by Mori Man
Wed Jul 12, 2017 4:32 am
Scoring on plungers

Last post by Miles « Wed Jun 28, 2017 11:58 am
Replies: 2
by Miles » Wed Jun 28, 2017 12:37 am

Hello folks, may have written off two sets of carbs here but I had them both vapour blasted.

Upon rebuild, all with new seals and build to factory...

2 Replies

357 Views

Last post by Miles
Wed Jun 28, 2017 11:58 am
ZXR 400 Rough below 5-6k boggy + backfire any ideas?

Last post by reggie1324 « Thu Jun 22, 2017 10:32 pm
Replies: 8
by reggie1324 » Mon Jun 19, 2017 7:46 pm

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...

8 Replies

709 Views

Last post by reggie1324
Thu Jun 22, 2017 10:32 pm
Throttle cable clip - location?

Last post by Moonfire « Mon Jun 19, 2017 6:59 pm
Replies: 2
by Moonfire » Mon Jun 19, 2017 2:57 pm

Hi. I'm in the process of rebuilding a ZXR400 and have a part that I labelled as part of the throttle linkage but can't remember where it goes! I've...

2 Replies

380 Views

Last post by Moonfire
Mon Jun 19, 2017 6:59 pm
ZXR bad fueling low RPM

Last post by Miles « Sun Apr 09, 2017 8:34 pm
Replies: 3
by Solis560 » Sun Apr 09, 2017 3:13 pm

Hey everyone,

I've recently had some problems with the ZXR400, it felt very boggy on WOT and didn't like to go above 6k RPM, but it would run...

3 Replies

555 Views

Last post by Miles
Sun Apr 09, 2017 8:34 pm
Wet and dry choke

Last post by Miles « Sun Apr 09, 2017 12:15 am
Replies: 2
by Miles » Sat Apr 08, 2017 11:05 am

Hello, had my carbs vapour blasted and ultrasoniced . Came back looking great, fitted to the bike and fired up first time.

I then noticed that my...

2 Replies

463 Views

Last post by Miles
Sun Apr 09, 2017 12:15 am
Struggling above 8000 rpm

Last post by matthew « Thu Apr 06, 2017 5:26 pm
Replies: 3
by matthew » Tue Apr 04, 2017 9:58 pm

Hi folks...bit of help needed..my race bike really struggled with revs over 8k..carbs have 108 main jet in and standard needles...that's all I really...

3 Replies

612 Views

Last post by matthew
Thu Apr 06, 2017 5:26 pm
Would Airleak Cause bike to Run Rich?

Last post by banner001 « Tue Feb 07, 2017 9:20 am
Replies: 3
by danni22041990 » Mon Feb 06, 2017 1:58 pm

Hi,

so iv cleaned the carbs (although were spotless anyways)the bikes choke was stuck on so released that and now the bike is running so much better...

3 Replies

699 Views

Last post by banner001
Tue Feb 07, 2017 9:20 am
zxr400 L3 wont run on choke, overfueling?

Last post by banner001 « Wed Feb 01, 2017 1:36 pm
Replies: 1
by danni22041990 » Wed Feb 01, 2017 12:21 pm

Hi,

recently bought a L3 model (Saturday) and noticed a problem straight away.

When I first went to see it no issues this was a month ago.

Now...

1 Replies

501 Views

Last post by banner001
Wed Feb 01, 2017 1:36 pm
bike boggs at 8000rpm

Last post by rccaulfield « Thu Dec 15, 2016 12:57 pm
Replies: 3
by D0n H » Fri Nov 18, 2016 8:49 am

Hi Guys

Im running out of ideas what to have a look, at my bike keep bogging out after 10,000 RPM , well more like starving for fuel or air im not...

3 Replies

784 Views

Last post by rccaulfield
Thu Dec 15, 2016 12:57 pm
engine cuts out with even the smallest use of throttle?

Last post by Miles « Sun Nov 20, 2016 7:59 pm
Replies: 2
by kwikasfakininja » Sun Nov 13, 2016 1:04 pm

Hi guys, excellent forum you've got here!
Hoping somebody's gonna be able to shed some light on my issue, I'm assuming this is gonna be a carb...

2 Replies

683 Views

Last post by Miles
Sun Nov 20, 2016 7:59 pm
Carb diaphragm

Last post by Monsterter « Thu Nov 03, 2016 1:16 pm
Replies: 1
by Miles » Tue Oct 04, 2016 11:16 am

Sure this has been asked before but couldn't find it in the search.

From the parts diagram I don't believe you can but is it possible to just change...

1 Replies

596 Views

Last post by Monsterter
Thu Nov 03, 2016 1:16 pm
PLZ HELP 1990 Zxr400-H running incredibly rich

Last post by fstarocka « Wed Oct 12, 2016 5:38 pm
Replies: 5
by fstarocka » Sun May 29, 2016 2:58 pm

Hi, this thing seems like it does not respond to anything I do.

Float height set at 11mm, mixture at 2 turns, cleaned 3 times now.. Floats not...

5 Replies

1037 Views

Last post by fstarocka
Wed Oct 12, 2016 5:38 pm
Rich Idle

Last post by fstarocka « Wed Oct 12, 2016 5:32 pm
Replies: 10
by fstarockr » Sat Sep 10, 2016 6:20 am

My zxr400 has been running rich since I bought it, idling rough, black powder on plugs and after a 150 mile journey the inside of exhaust was also...

10 Replies

1209 Views

Last post by fstarocka
Wed Oct 12, 2016 5:32 pm
anyone have idea what is this on carb? ZXR400

Last post by banner001 « Mon Sep 12, 2016 9:31 am
Replies: 3
by baak » Sat Sep 10, 2016 1:43 pm

picture is 91model I think but I have no such a thing like that on my carb L7
what is that for tube thing?

3 Replies

1085 Views

Last post by banner001
Mon Sep 12, 2016 9:31 am
Carb problem

Last post by fstarocka « Sat Sep 10, 2016 6:38 am
Replies: 2
by Rubencio » Tue May 10, 2016 9:29 pm

Hi Lads, need a bit of advise please.

The bike start at a touch of the bottom, form cold, if I put the choke completely.
What happen is that the Rev...

2 Replies

625 Views

Last post by fstarocka
Sat Sep 10, 2016 6:38 am
Petcock repair kit

Last post by fstarocka « Sat Sep 10, 2016 6:35 am
Replies: 6
by Rob398 » Mon May 02, 2016 8:32 pm

Hi, does anyone know where you can get a fuel tap repair kit, L2 model, I've seen them on ebay coming from Poland but don't know about the quality,...

6 Replies

1006 Views

Last post by fstarocka
Sat Sep 10, 2016 6:35 am
Fuel Basic Setup

Last post by fstarocka « Sat Sep 10, 2016 6:32 am
Replies: 4
by Tricey27 » Mon Aug 22, 2016 11:40 pm

Hi...
Just after some advice please.... Basically i purchased a project ZXR400 H1 model. And have got all chassis etc done and got it running...

4 Replies

901 Views

Last post by fstarocka
Sat Sep 10, 2016 6:32 am
Need needle jets for 1990 H2 zxr400 - part numbers?

Last post by fstarocka « Wed Sep 07, 2016 6:47 pm

by fstarocka » Wed Sep 07, 2016 6:47 pm

Hi all - so my bike has been running pig rish since i got her in Feb.. ive ruled out every possibility so pressed out my emulsion tubes today, one...

0 Replies

440 Views

Last post by fstarocka
Wed Sep 07, 2016 6:47 pm
Racing fuel tank

Last post by banner001 « Tue Aug 30, 2016 9:26 am
Replies: 2
by rrzx4 » Wed Aug 03, 2016 6:12 pm

Hello,
I look for a racing fuel tank and his cover for a zxr 400 like that.

Do you know where I can find and buy this one ?
Thank you.

2 Replies

821 Views

Last post by banner001
Tue Aug 30, 2016 9:26 am
My carb balancing results, thoughts please

Last post by deano1351 « Thu Jun 30, 2016 7:18 pm
Replies: 4
by deano1351 » Thu Jun 23, 2016 8:24 pm

I balanced my carbs a few days ago and just want your opinions on the results. Iv always balanced the carbs on my other motorbikes with the revs on...

4 Replies

920 Views

Last post by deano1351
Thu Jun 30, 2016 7:18 pm
Engine Choking on Full Throttle

Last post by fstarocka « Wed May 25, 2016 10:34 am
Replies: 2
by RebelliousIntentions » Sat May 10, 2014 1:28 pm

Hi Guys,

I've got a dilemma. I've got a gpx 400 that i've recently bought. first of all its a pig to start. i've noticed 1,2 & 4 vacuum holes are...

2 Replies

866 Views

Last post by fstarocka
Wed May 25, 2016 10:34 am
fuel flow issue

Last post by fstarocka « Fri May 13, 2016 9:17 pm
Replies: 5
by SeattleZXR » Fri May 06, 2016 3:17 pm

This is my second ZXR400 and both bikes have had the same problem. I have taken them both to a dyno shop and they are properly jetted showing a...

5 Replies

880 Views

Last post by fstarocka
Fri May 13, 2016 9:17 pm
Carb holders sealant?

Last post by fstarocka « Fri May 13, 2016 9:10 pm
Replies: 10
by Flatcap » Sat Apr 30, 2016 6:52 pm

Ok chaps, I have really tried to resolve my carb issues before posting up questions every day but now I need some help!
This l3/l4 I bought as a none...

10 Replies

1323 Views

Last post by fstarocka
Fri May 13, 2016 9:10 pm
1990 H model float height adjustment

Last post by fstarocka « Fri May 13, 2016 3:27 pm

by fstarocka » Fri May 13, 2016 3:27 pm

Hi all - so.. got a bike for nothing in jan.. replaced rings and got her going 5 days ago..

problem is she is running PIG rich no matter what I do!...

0 Replies

499 Views

Last post by fstarocka
Fri May 13, 2016 3:27 pm
Hope I have not wasted my time

Last post by Flatcap « Sun Apr 24, 2016 9:42 pm
Replies: 4
by Flatcap » Sat Apr 23, 2016 7:24 pm

Refitted my cleaned set of carbs this morning to be greeted with fuel pouring out the overflows :smt017 After reading up a bit, the original o rings...

4 Replies

758 Views

Last post by Flatcap
Sun Apr 24, 2016 9:42 pm
L9 float valve seals

Last post by Top-shaggy « Wed Mar 30, 2016 11:53 am
Replies: 4
by dave111 » Thu Oct 01, 2015 11:57 pm

does anyone know where you can get the float valve seals from for L9 carbs? all i've managed to find are full kits About 18 quid each x 4 and all i...

4 Replies

973 Views

Last post by Top-shaggy
Wed Mar 30, 2016 11:53 am
pilots??

Last post by richyrd5 « Sun Mar 06, 2016 3:53 pm
Replies: 3
by richyrd5 » Sat Mar 05, 2016 7:15 pm

Went out for first time on my zxr today....carbs all set properly but have 2 turns out on pilots...has 98 mains.dj needles clip on top groove...when...

3 Replies

879 Views

Last post by richyrd5
Sun Mar 06, 2016 3:53 pm
h carb i.d

Last post by richyrd5 « Tue Mar 01, 2016 1:18 pm
Replies: 7
by richyrd5 » Sun Feb 21, 2016 4:51 pm

Hi.taken my carbs of and cleaned them out...i have 92 mains(all 4)and,I think,dj needles(no markings and waisted towards the bottom)with clips on 3rd...

7 Replies

1106 Views

Last post by richyrd5
Tue Mar 01, 2016 1:18 pm
1999 ZXR Carb Removal From Bike

Last post by swindo221991 « Tue Feb 23, 2016 9:56 am
Replies: 16
by swindo221991 » Wed Feb 17, 2016 7:14 am
1

2
Hi All,

Does anyone have a step by step guide for removal of carbs from the bike?

I've read the guide on the forum for striping and cleaning which...
16 Replies

1996 Views

Last post by swindo221991
Tue Feb 23, 2016 9:56 am
Repair/replacement of valve diaphragm rubber

Last post by Monsterter « Sat Jan 09, 2016 10:32 am
Replies: 7
by Monsterter » Fri Aug 28, 2015 12:17 am

Hi im from philippines, i really need your help guys. If there are possibility to repair our valve diaphragm, or alternative rubber to replace the...

7 Replies

1296 Views

Last post by Monsterter
Sat Jan 09, 2016 10:32 am
Main Jets and N77S Needle

Last post by U_h0rnet5 « Tue Jan 05, 2016 1:31 pm
Replies: 2
by U_h0rnet5 » Mon Jan 04, 2016 9:10 pm

Happy New Year Everyone,

As the weather is absolutely miserable at the moment, I thought that I would strip down some spare carbs and clean them...

2 Replies

856 Views

Last post by U_h0rnet5
Tue Jan 05, 2016 1:31 pm
Carbs...H vs L

Last post by tosser « Sat Dec 05, 2015 6:23 am

by tosser » Sat Dec 05, 2015 6:23 am

Hi all,
I have a set of 30mm and 32mm std carbs.
Was wondering what differences people have felt comparing both. I hear the 30's give more...

0 Replies

693 Views

Last post by tosser
Sat Dec 05, 2015 6:23 am
h model carbs overflowing

Last post by ChowderV4 « Sat Nov 28, 2015 5:54 pm
Replies: 3
by ChowderV4 » Thu Nov 26, 2015 7:43 pm

im in the process of fixing up my brothers h model ready for mot.
it ran okay when i got it to mine but it had been off the road for a long time and...

3 Replies

900 Views

Last post by ChowderV4
Sat Nov 28, 2015 5:54 pm
power lose at high rpms

Last post by SeattleZXR « Tue Nov 24, 2015 1:50 pm
Replies: 5
by SeattleZXR » Sun Nov 22, 2015 4:34 pm

When I'm in 5th or 6th gear at about 12,000rpms the bike starts to cut out. I think it might be the carb bowls are running dry. Is it common for the...

5 Replies

1221 Views

Last post by SeattleZXR
Tue Nov 24, 2015 1:50 pm

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