20 Most Recent 1989 kawasaki ZXR 400 Questions & Answers

fuel not getting in the cylinder this could either be the float or mixture screw on the carb is a screw the air mixture screw turn this out 1 whole turn or just fiddle with it until it runs if not buddy get back to me

Wiring diagram - https://is.gd/GPX600_Wiring_Schematic_88_91 Parts Diagram - https://www.4shared.com/download/6h3lA8JYce/Kawasaki_GPX600_EX600_GPZ600_N.pdf The best source for the manual would be the Haynes version: http://www.haynes.com/products/productID/405 Best of luck!

The best way is to get your Kawasaki dealer to do the work. He or she has the parts, tools and expertise to return your carbs to good as new condition. Unless you have the same, you will be disappointed with the results and it will take you a long long time.

There is no bleeding it. The correct/official procedure is;- Tighten the drain plugs- Fill the radiator up to the thermostat housing filler neck with coolant.- Fill the reservoir tank up to the upper level line with coolant.- Start the engine with the radiator cap removed and run it until no more air bubbles can be seen in the coolant.- Tap the radiator hoses to force any air bubbles caught inside.- Stop the engine and add coolant up to the radiator filler neck.- Install the radiator cap.- Fill the reservoir tank up to the upper level line with coolant and install the cap.I hope this help,Sid.

There is a cam chain tensioner on the ZXR 400. It sounds like you need a new cam chain.Important Note: The cam cahin tensioner is held on by the two bolts that hold the clutch cable bracket underneath the timing cover. Never loosen these bolt and re tighten them. If you need to undo them, remove the cam chain tensioner and reset it.

dont replace them unless you really just want new carbs take them off and spay them down with carb and choke cleaner

hi, it seems like a ignition ploblem. Try a reset by disconecting the batery from the bike.
good luck

Sounds as likely to be electrical as fuel. Is the igniter, (if it has one, some did) OK? How about the battery voltage when running, on the coils.

it doesnt need wearing in , something is wrong, take it off and make sure the inner moves freely inside the outer absolutely no resistance, and make sure your throttle tube turns freely on the handle bar

hi,not normally,the starter relay only supplies power to the starter,but in saying that,check the feedline(red)from the relay back to the fuse box,some bikes have the electrical supply feed taken from that relay to supply power to the rest of the electrical system..cheers

also check the side stand switch disconnect it

All ZXR400s use the same throttle cables
I'm not sure about the twist grips but any should fit

Ride safe
Bike-Doc
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Firing order is 1 2 4 3

Ride safe
Bike-Doc
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Hi hall ie
I just replied to your last question about firing order
I couldnt get back to you with a reply to your idle screw question due to a software problem
Has the bike been unused for a long time?
Please review your last 2 questions (which I've answered) & gimme some feedback as it helps my ratings
Ride safe
Bike-Doc

No you are confusing the idle screw (a thumb-screw) with the air/mixture screws, these are turned inwards (clockwise) until they lightly seat & then back out the specified amount
You should have the bike tuned by a professional who should include synchronising the carbs, this will let the engine run more smoothly, idle at lower revs ,increase speed & all-round performance speed

Ride safe
Bike-Doc
Please mark this as very helpful (if it has been!!)

Are you sure there clean? did you dissasemble yourself?
I had similar issue and i 1. removed carbs 2. drained float bowls 3. removed main jets
I soaked main jets in carb cleaner, then blew all passageways with carb spray, then sprayed carb spray through all passageways in the carbs, i checked all rubber diaphragms for cracks especially the float bowl ones, my main problem was old varnished , gel like fuel traces which had built up from bike being idle over winter.

Once i completed this i reassembled and the bike idled steady and also revved cleanly to 15k revs, you might also want to check your fuel filter as it can effect flow rates if clogged with old varnished fuel

sounds as if you have carb jet problem strip down and check all jets for blockages.anmd Have you tried to run without an air cleaner ,It may be causing a lack of good air mixture.

Backfires may indicate that a valve is sticking open, so that you are not getting compression. I am assuming that no repairs or adjustments were done which might have messed up the timing of valves or ignition.

To Identify the year model look for the compliance plate.
It is usually found on the steering stem(on the frame between the forks).Turn the steering to one side to get a good look & use a torch.
Otherwise go to "buykawasaki.com"
This web site lets you input the engine number &will tell you what year it is.
OR- ring your local Kawasaki dealer & Quote the number. From this they should easily be able to Identify your model for you.
Hope this helps.
Regared Andrew Porrelli

Here are several ways to troubleshoot.
1. Check the ignition coil.
2. Check or replace CDI.( If in case it is a CDI operated )
3. If it is still Contact point:check the timing.The contact point, Or replace the condenser
4. Or,Check your Ignition switch because it might be losen and is grounded to the body or chasis.