Question about kawasaki ZXR 400 Motorcycles

1 Answer

I have a 1980 z1000j model and it back fires bad,it hasent been going for 18months as we moved house now i want to continue to chase this problem i have hit the wall,i have replaced the plugs,leads,air cleaner,carbies re built,inlet,outlet manifolds replaced,diaphrams in carbies replaced and still the same issue,yesterday i started it for the first time and as you are sitting on the bike the inside right pipe was near glowing red,looking back this issue has slowly got worse,your help would be greatly appreciated

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 6 Answers

Like all mechanical issues this is just a matter of elimination.
There is no mention of the exhaust system in the comment.

Is the motor backfiring despite the exhaust? Is there a corroded suppression baffle increasing back pressure? "... looking back this issue has slowly got worse"

There is a balance in the explosive gases, based on the comment.
So it seems the ignition chamber gases / fuel mix is correct. But there is enough fuel air ratio to post ignite, seems like an exhaust side issue from the comments.

Still there is nothing like feet on the ground ;)

Posted on Nov 19, 2013

  • 3 more comments 
  • mick melick
    mick melick Nov 19, 2013

    is there any the timing could be out???the motor itsself has never been touched

  • mick melick
    mick melick Nov 19, 2013

    ill start again,,,is there any chance the timing could be out,the motor its self has never been touched,the only think i havent changed is the coils or checked the timing .

  • Cocoa Jackson
    Cocoa Jackson Nov 20, 2013

    The assumption was the timing was set as the carb was rebuilt. Leads, coils and all the electrical circuit needs to be in top condition for the timed spark to ignite the fuel.

  • Cocoa Jackson
    Cocoa Jackson Nov 20, 2013

    The assumption was the timing was set as the carb was rebuilt. Leads, coils and all the electrical circuit needs to be in top condition for the timed spark to ignite the fuel.

  • mick melick
    mick melick Nov 22, 2013

    no ive never touched the engine at all,ive never had a cover off it,any chance the carbies wernt fixed properly???



6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 86 Answers

SOURCE: 750 89' Yamaha Virago gas & oil coming out of air cleaner

sounds like the floats are stuck. cleaning carbs should do the trick. its a good practice to start up motorcycles and let them warm up from time to time while being stored.

Posted on May 07, 2009

  • 82 Answers

SOURCE: Exhaust glows bright red.

These bikes dont like to idle for very long. If you ride at a reasonable pace, it shouldn't glow for long. If it persists... Your jetting is too lean. Check out for a pictorial step by step how to re-jet

Posted on May 08, 2009

  • 408 Answers

SOURCE: Yamaha dt 175, voltage question. When idling, my

You need new regulator and new battery.The battery works as a filter as well.If it is in bad condition it does not filter anything and in high rpm the current is very high.

Posted on Jun 09, 2009

  • 33 Answers

SOURCE: Wont start sounds like it doesn't even try to fire

Check the rectifier.

Posted on Jul 12, 2009

  • 221 Answers

SOURCE: idles with choke on - dies immediately with choke off

check air bleeds in carb next check exhaust port and pipe may be clogged as well as air intake

Posted on Jul 21, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Hi,can you give me any information about the house fire that took place around,the 1980,s at 32 Beulah Rd E17 hanks

There are no news stories online. Before internet days, you would have to contact a local newspaper.

at 32 Beulah Rd E17 Google Search

Jan 01, 2017 | Cars & Trucks

1 Answer

Kawasaki z1000j

valve clearance is 2 - 4 thou
if you dont rev over 9k then you'll never need to reset again

Jun 23, 2014 | 2003 kawasaki Z 1000

1 Answer

Wont start at all

If you have no light you can't even hot wire it sounds like the ignition switch is bad in the start and run positions.

Jan 30, 2014 | 2005 Yamaha YZF-R6

1 Answer

How do you adjust the clutch and cable on 1980 KAWASAKI 450 LTD

Is that the EN 450? If so I happen to have a factory service manual for that.
Go to the right hand side of the crankcase and loosen both adjuster nuts on the cable so it moves freely in the bracket.
Loosen the cables locknut at the lever and turn the adjuster bolt so there is about 5-6mm of thread showing between the locknut and the head of the adjuster bolt.
Now go back down to the crankcase and pull on the cable housing towards the front of the bike and tighten the front adjuster nut against the bracket. Then tighten the rear nut.
Now go back to the lever and adjust the cable so there is about a 2-3mm gap of freeplay between the lever and its bracket. Then tighten the locknut againts the levers bracket.

Aug 23, 2011 | 1980 kawasaki KZ 1300 A2

1 Answer

We have just moved into an old house with a Baxi open fire and have no idea how to use it. Do all Baxis have boilers? How do we find the model name/number? Is there any risk in using it if the backplate is...

baxi do boilers they are on the baxi potterton wed site, but they are gas would not use with the back platecracked this old fire place you may have trouble finding parts if any , try someone one that deals with woodburners of fire places , they could well be you bestline to go down or a chimney sweep

Oct 15, 2010 | Heating & Cooling

1 Answer

We just moved into a new house, and whenever I use

It sounds like it could be one of the following issues:

1. Bad wiring to the bathroom receptacle - this should be a GFCI outlet.

2. There is an overload somewhere on the same circuit - try the dryer with nothing else turned on.

3. The hair dryer may be bad or have a bad cord, plug, etc. Hair dryers can also become plugged (the air inlet screen) and overheat.

4. There could be loose or other bad wiring somewhere in the circuit.

If you are not familiar with working with electricity, it would be best to call a qualified electrician. They are the pros and can correct the problem.

May 20, 2010 | Kitchen Appliances - Others

1 Answer

No fire

check main relay

Jun 08, 2009 | 1991 BMW 3 Series

1 Answer

Hard to kick plug in/out backfires possible causes

check vale clearins if that fails check statour / pick up . make shour it hasent broke the woodruf key in the fiy wheel

Apr 21, 2009 | 2002 KTM LC4 625 Sc

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

95 people viewed this question

Ask a Question

Usually answered in minutes!

Top kawasaki Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4535 Answers


Level 3 Expert

76630 Answers


Level 2 Expert

342 Answers

Are you a kawasaki Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides