20 Most Recent 1989 kawasaki GPX 750 R Questions & Answers


Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a cursory reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Dirty air filter.
10. Intake air leak.
11. Water, dirt, or rust in the fuel system.
12. Carburetor contaminated, sticky float, plugged jets.
13. Carburetor has oil in the bowl due to excessive oil in pre-mix.
14. Carburetor vacuum diaphragm torn, cracked, not seated or installed improperly.
15. Multiple carburetors out of sync.
16. Fuel filter clogged.
17. Old or contaminated fuel.
18. Fuel tank vent system plugged or carb vent line closed off.
19. Gas cap diaphragm valve faulty.
20. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
21. Carburetor controls misadjusted.
22. Incorrect valve timing.
23. Valve springs floating, weak, or broken.
24. Damaged intake or exhaust valve.
25. Incompatible performance parts.
26. The control module may be in "LIMP" mode
27. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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1989 kawasaki... | Answered on Sep 04, 2018


Hi, Bear_stone69 for this scenario you will need your service manual that has all fastener torque specs and a wiring diagram on the back pages, parts fiche, and owners manual if you can't find the best tool you ever bought for your Kawasaki, despair not, for a mere $15 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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1989 kawasaki... | Answered on Aug 31, 2018


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Kawasaki, despair not, for a mere $10 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1989 kawasaki... | Answered on Mar 06, 2017


Try asking on a Kawasaki Motorcycle Forum. Someone on there will have all the information you need.

1989 kawasaki... | Answered on Feb 05, 2012


its not been charged by the alternator so you have to change the alternator is not a massive job to fix can be a diy job

1989 kawasaki... | Answered on Apr 30, 2011


You have do dissasamble it first, it is actualy made of 2 pieces, hold together by screws.
You put the big piece into place first, then the smaller one, than the screws.

1989 kawasaki... | Answered on Feb 01, 2011


Try to look in the "parts list" pds. There is a section about the carburators, that should help. If you don`t find the pdf (it should be on the site you downloaded the Hayness manual), send me a mail to cr15tix@yahoo.com

1989 kawasaki... | Answered on Feb 01, 2011


With cold engine, put it on center-stand, let it sit 1-2 minutes, look at the "window" on the right. The level should be within MIN and MAX

1989 kawasaki... | Answered on Feb 01, 2011


You either have a blown main fuse usually located by the starter solenoid. Follow the positive battery cable to the starter solenoid and locate the main fuse . See if it is blown and replace it if necessary. The other possibility is that the electrical contacts in the base of the ignition switch are dirty and no longer making a connection when the key is turned on. Take the contact base off of the bottom of the switch, clean the contacts, and put it back together noting where all the little pieces go and being careful not to lose any. If the switch is not repairable replace it with a new one.

1989 kawasaki... | Answered on Jan 31, 2011


Nice bike.
Change the fluids, pour a tablespoonfull of cycle oil in each pot through the spark plug holes and leave at least overnight. That will lubricate the cylinder bores.
If it starts then decide whether to take the top off.
Good luck.
My 1965 Harley IronHead XLCH was not run for 24years and after the above attention, spluttered into life.

1989 kawasaki... | Answered on Jan 23, 2011


No, their would be no reason to change the piston and rings first up, unless you know that they are worn from the previous owner, Get the bike up and running first and go from their, will be a good chance the piston and rings will be fine.

Change the oil first up as their is a good chance condensation has occurred and put water in to the oil. Drain the fuel from both the tank and carburettor, as this would have gone stale. Change battery or jump start if required.

suspect. With the spark plugs out, crank the engine over a few times. (ensure oil level correct) If it winds over all good, put a few drops off oil in the cylinders. This will help build compression. Re-fit spark plugs, Full choke and give it a shot. Away it should go! Aerostart or ether may come in handy.

Goodluck!

1989 kawasaki... | Answered on Jan 23, 2011


Hi there. To upgrade your old rear shock is a good idea, however very expensive. Makers like Koni, and Ohlins, will have a rear shock to fit your bike, but unless your willing to part with about $1000, then considermy second solution. Have your old rear shock re built, or re furbished, by a qualified suspension mechanic, for a fraction of the cost. It is also possible to customise, and taylor your old shocky to suit you. Example,shorten the spring?, add a spacer to stiffen it up a bit, less oil, or more oil?
I would look into a rebuild first, unless, like i say, you are prepared to spend about $1000 plus.
Anything you choose, will definately enhance your bike.
Good luck

1989 kawasaki... | Answered on Jun 18, 2010


might be improper float level height. try raising the foat level a little bit.

1989 kawasaki... | Answered on May 27, 2010


JB will do it temporarly. Make shure the buyer know of the problem.you can it get it done by an aluminum welder for cheap. friend had it done for like 20 bucks at a local car shop with an experienced aluminum welder. seems like thatw s a deal as i was estimated at 50 for a job. but better then a 600 dollar casing, or putting jb on it

1989 kawasaki... | Answered on Nov 10, 2008


Hi, Saraharichad for this scenario you will need your service manual that has all fastener torque specs and a wiring diagram on the back pages, parts fiche, and owners manual if you can't find the best tool you ever bought for your Kawasaki, despair not, for a mere $15 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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kawasaki GPX 750... | Answered on Sep 21, 2018


My old XT 600 had a thicker side, and a flat side. If you put it on backwards it sits too close to the engine. (causing play)
Do you still have your old sprocket to compare the thickness?
frontsprocket-84-tsxweyb30uqizotv113yfny5-5-0.jpg

kawasaki GPX 750... | Answered on Oct 02, 2017


Is there any fuel in the cylinders when you take out the spark plugs? If so the fuel system is dumping in too much fuel into the engine. Sunk floats in the carburetor will cause that.

kawasaki GPX 750... | Answered on Aug 09, 2017


remove seat and side panels to gain access to everything. unbolt the airbox there should be three or four bolts and atleast one is going to be hidden. loosen clamps on air boots from airbox to carbs and slide back air box. it might only move an inch or two but that is all you need. unhook everthing on carbs and loosen clamps on intake boots. slide and wiggle back on carbs and you should have enough room.

kawasaki GPX 750... | Answered on Oct 03, 2013


You can get to the nuts without removing anything, turn the bars to full lock and use a 10mm spanner

kawasaki GPX 750... | Answered on Sep 10, 2011

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