what the heck happened

  • jacksdad
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  • 1979 kz 750 OUCH, IT SPARKED
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30 Jul 2011 19:59 #465901 by jacksdad
what the heck happened was created by jacksdad
today, I went for a little ride with my son on the back to get some polishing supplies, when I got back, I let the bike cool down for about an hour, went out and did some cleaning, mainly just soap and water, after I was done, I rode it up and down the street a couple of times, just now I went to go the the conv. store and it won't start, kick start only because I need to rebuild the starter, I have kicked it probobly 50 times and nothing, did I screw up with spraying water on some parts accidently, like maybe the coil or the points?

1979 kz750 twin cyl.

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31 Jul 2011 04:35 #465967 by Qdude
Replied by Qdude on topic what the heck happened
Washing a bike isn't as bad as mucking around the wire bundles IMHO. I would pull a plug and check for spark and or signs of flooding. I would also probably try to compression start it first. I can kick my bike once it is running well, but if something goes downhill internally and it starts to flood a little then it seems that trying to kick-start it just makes it worse.

I would put my money on a little water where it usually is not causing the otherwise running bike (that would have probably started on the electric starter) to flood just a little. After that, the kicking just fed more and more gas into the "too wet to fire on kicking" cylinders.

Second choice is that while washing/scrubbing the bike you tugged/moved/jostled a wire bundle and pulled a connector loose somewhere.

I believe that the problem will fix itself by tomorrow.

77 KZ 650 C1.
77 KZ 650 C1.
Crashed-Repaired, Pods, Kerker pipe, re-wired core bundle, lamp upgraded, homemade rectifier, solid state regulator , Dyna-s ignition, repainted, slightly modified, year-round commuter
Honda Metro 85 mpg Scooter. Dont laugh I will throw it at you

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  • jacksdad
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31 Jul 2011 19:25 - 01 Aug 2011 00:02 #466058 by jacksdad
Replied by jacksdad on topic what the heck happened
I did get her running, although now it is missing at idle, same thing happened about 3 months ago, new lugs fixed it, going to the parts store after while. i rode it around for about thirty minutes, to dry everything off, doing good now,

1979 kz750 twin cyl.
Last edit: 01 Aug 2011 00:02 by jacksdad.

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  • TeK9iNe
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31 Jul 2011 19:53 #466061 by TeK9iNe
Replied by TeK9iNe on topic what the heck happened
These bikes are usually ok in the rain, even a good downpour - but the electrics were never meant to have a stream of water sprayed into them. Maybe use some compresed air and blow out the handlebar controls, etc.

Always good to pull off the tank and check the coils/wiring - make sure to use good die-electric grease on the fittings so they seal water-tight - not on the connectors themselves, just the rubber fittings and do the whole ignition setup while your in there.

Gool duck.

B)

Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)

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31 Jul 2011 19:58 #466062 by MFolks
Replied by MFolks on topic what the heck happened
You might want to do this in the near future:

Cleaning Motorcycle Electrics

Get some of the De-Oxit electrical contact cleaner and figure on spending a good day going from the front of the bike to the back. It’s a plastic safe cleaner/preservative. www.deoxit.com is their website.

On the older Kawasaki's, a majority of electrical connectors are inside the headlight housing requiring removal of the headlight, then the fun begins.

Do one set of electrical connectors at a time to avoid mixing up what connects to where. Usually disconnecting, spraying with De-Oxit and reconnecting is about all you'll need.

However, when encountering the green crud of corrosion, a brass wire brush may be needed on the pins you can reach.
Some 400-600 grit wet and dry sandpaper strips rolled into a tube should reach the male and female pins in the more difficult to clean connectors.

Smoker’s pipe cleaners, cotton swabs and wooden toothpicks work as cleaning aids.

Really small electrical connectors may require the use of a welders tip cleaning tool assortment.

Most pins in the connectors are coated with a thin plating of tin, and others may be nothing more than copper or brass.

If moisture is added, the resulting corrosion lowers the voltage/current being carried causing dim lights, slow engine cranking, slow turn signal responce and lower input voltage to the ignition coils resulting in weak spark.

The left and right handlebar switch pods will need attention too as they have circuit functions like turn, horn, run/stop, and start.

Usually a spritz or two with actuation of the switch is about all needed for these switches unless corrosion is detected and then careful disassembly is required.

The ignition switch may or may be not sealed to allow spraying the internal contacts. I urge caution if attempting to open this up as springs, and ball bearings may fly out never to be seen again!

If your bike has the older style glass tubed fuses, I suggest replacing them as vibration can cause internal failure. AGX is the type used, and most auto parts stores can get them for you.

Clean the fuse holder clips, looking for signs of overheating(discolored insulation, signs of melting).
I use metal polish on a cotton swab, followed by spraying another clean swab with the De-Oxit and then rubbing the inside of the fuse clip.

All battery cables must be clean and tight for maximum current transfer. Check the cables going from the Negative(-) battery terminal/post to the engine mounting bolt

Also the one going from the Positive(+) terminal to the starter solenoid and from there to the starter motor.

If any battery cable feels ”Crunchy” when flexed, replace it as possible corrosion is inside the insulation.

Each "Bullet Connector" will have to be sprayed to ensure good connectivity, especially the ones going to the energizing coil of the starter solenoid.

The alternator output “Bullet Connectors” are usually behind the engine sprocket cover and will need inspecting and cleaning too.

The turn signal light sockets will benefit from a spritz from the contact cleaner along with the tail light/brake light socket.

Some brake light switches can be sprayed on the actuating rod, with the spray running down inside to the electrical contacts, others may be sealed requiring replacement if the switch is intermittent in operation.

Some people put the Di-Electric Grease on cleaned terminations/connectors, I don’t, as I’ve read/heard it can cause problems when it gets hot, actually insulating the connections, so the choice is yours to use or not.

I think I've covered about all of the electrical systems on the bike.........



Why WD-40 Should Not Be Used On Motorcycle Electrical Items.

For many years, I was proponent of the use of WD-40 on fuse clips, fuses, switches and connectors. After hearing of other peoples experience with intermittent and sporadic activity, I shrugged it off as maybe they did something wrong in the application of the product.


It wasn’t until the time I rode my 1982 GPz1100 B2 model to downtown San Diego that I encountered the problems others had gone through.

After concluding my business downtown, I walked to where my bike was parked, turned the key to unlock the forks, and prepared to start the engine. The key was in the "On" position, yet I had no lights in the dash panel, the fuel pump was not running(I have FI), and the horn and tail light were not working.

Puzzled as to why nothing electrical was happening, I remember my earlier conversations about how WD-40 will over time become a non-conductor(more like an insulator). I had some pieces of 400 and 600 grit sandpaper in my tool kit and with them was able to scratch away the coating from the WD-40 on the fuses and clips.

After removing the insulating film, the bike started and ran like it should. Since that time, I’ve told people about the problem with WD-40. If you must use a contact cleaner, I recommend getting some "De-oxit" from Radio Shack Stores or any good electronic supply store.

1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)

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