1981 Goldwing Not firing correctly


Information and questions on GL1100 Goldwings (1980-1983)
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wowimohsobored
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Location: Kansas City Kansas
Motorcycle: 1981 GL1100

1981 Goldwing Not firing correctly

Postby wowimohsobored » Tue Apr 26, 2011 12:41 am



I am unsure if this makes since or not but i only have fire on the back cylinders. I can switch the wires yellow and blue on the coils back and forth between the two and it switches from the back cylinders to the front cylinders. Later in the evening i got fire from both plugs on one side but one plug is very faint. ie very light spark nothing like the other one. Does this sound familiar to anyone or do i have something hooked up incorrectly? Also i should not the bike sat for around 7 years the replacement coils are for a 83 not a 81. once it does start it wont idle at all , below 3000rpm it has a clank like a cylinder aint firing and will die. it doesnt act like the timing is off or the plugs are incorrectly wired above 3000 rpm so i am unsure. Any help would greatly be appreciated!



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cpawilly
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Re: !981 Goldwing Not firing correctly

Postby cpawilly » Tue Apr 26, 2011 3:42 am

Check out the post from Apr 15 called "No spark on the right side - '83 Interstate" it may help.

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virgilmobile
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Re: !981 Goldwing Not firing correctly

Postby virgilmobile » Tue Apr 26, 2011 8:19 am

Check this out.Your bike is a 81 and the coils come from a 83.Look at the schematic.there different.I don't think that the coils are different,but the added resistor to the power source circuit will reduce the final coil current and the output.re-wire it to match your wiring(bypass the sandblock resistor) and re-test.I'll look into the coil primary resistance and see if there is a difference,or if you have the old one,check the primary winding and compare to your replacement.
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RBGERSON
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had every year from 75 to 83

Re: !981 Goldwing Not firing correctly

Postby RBGERSON » Tue Apr 26, 2011 11:28 am

Since switching the wires moves the spark I'd say short/ground in the wiring to one that doesn't work
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

wowimohsobored
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Motorcycle: 1981 GL1100

Re: !981 Goldwing Not firing correctly

Postby wowimohsobored » Tue Apr 26, 2011 9:42 pm

I was kinda wondering if the cdi boxes were possibly the culprit , i ended up ordering some from ebay just for the hell of it as well as new rear bearings and brake pads probably gonna move into the timing belts once this stuff is buttoned up.

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virgilmobile
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Re: !981 Goldwing Not firing correctly

Postby virgilmobile » Wed Apr 27, 2011 1:39 pm

It's possible,but the schematic shows only one CDI unit for both coils not 2.If you have the single box AND the resistor is removed,the CDI or pickup coil may be at fault.If you have 2 CDI units it's from a 82 or later model and can be swapped to test.It sounds like the coil packs are OK so it must be wiring,CDI,or pickup as they have a common power source.Not trying to be anal about this,but be sure the parts you use match the wiring needed to operate it.Mismatching parts may not work.On the 81,power goes to the CDI only.The 82 and up,the power goes to the CDI and through a resistor to the coils.They MUST be wired correctly to match the CDI type used.

wowimohsobored
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Motorcycle: 1981 GL1100

Re: !981 Goldwing Not firing correctly

Postby wowimohsobored » Wed Apr 27, 2011 5:55 pm

Well i am unsure whats going on , the frame says 81 model, it has two cdi units one with red covering on the wires and one with black covering on the wires, i did try to switch them and when i did that i didnt get any fire, i will try to switch them again , i also have two more cdi units coming i got off ebay , when i hooked up the coils i bypassed the resistor with the original harness, i am going to buy the correct set of coils off ebay later tonight just to get them on there way , at the present moment when i do a ohm test on the pickup i get the same reading on both sides of the pick up i cant find one on ebay though or id just order it, i am going to dig into the harness later tonight as i have a black wire i am unsure of where it goes or what its coming from thats just kinda hangin out with no connector on the end of it , i have the back end of the bike all apart as im replacing wheel bearings and cleaning up all the gunk off the swing arm , it looks like grease from the final drive possibly when i removed the wheel it had grease between the gears so im guessing thats where its comin from but i dont see any kind of seal that seals the back side of the unit and i havent delved into the manual much so maybe its coming from the bearing seal .

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virgilmobile
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Re: !981 Goldwing Not firing correctly

Postby virgilmobile » Thu Apr 28, 2011 4:00 pm

As per the schematic,when dual CDI units are used,a sandblock resistor is also used.this picture may help.
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virgilmobile
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Re: !981 Goldwing Not firing correctly

Postby virgilmobile » Thu Apr 28, 2011 8:28 pm

OK.I looked in my box-o-stuff,and here's what I found.1 pair of CDI's from a 83 with red wire sleeves.1 pair of CDI's from a 81 with black wire sleeves and newly silicone backed.The 81 had a resistor the 83 did not.I'm so confused.It appears the parts bike I got was suffering from the same mismatching repairs that your has.I'll stand by the schematic tho.Wire it to match your components and it should fire OK.Tho only thing we can be sure of at the moment is that the coils are OK.

wowimohsobored
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Re: !981 Goldwing Not firing correctly

Postby wowimohsobored » Fri Apr 29, 2011 1:55 am

Thanks for your help i am going to look into it tomorrow as the new cdi units are showing up and since i really have no other plans i might as well rite? I plan to take the gas tank to the car wash and pressure wash it out and possibly reinstall it and hopefully ill be certain the pickup coils are in good shape i will let ya know tomorrow sometime, i got a parts washer today and some new moly 60 for the final drive so ill be cleaning it all up in preparations of the new rear bearings and seals. i also need to work on most of the rear wiring from the plug back as one of the previous owners did a hack job on it for a led light unit i believe is what it is so its all got to be rewired. but thats just minor stuff...

wowimohsobored
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Re: !981 Goldwing Not firing correctly

Postby wowimohsobored » Fri Apr 29, 2011 11:15 pm

Honestly i feel like such a jack wad....so i did the ohm test on the cdi pick up and was looking at my wires and i was holding the wrong one using the wrong one to test......so sure enough i checked the otherside one was open. i took it all apart and come to find out one of the wires was broke about 3'' under the covering so i got that fixed got it back together and eventually got it started i believe its runnin on all 4 cylinders though it wont idle any at all... so i guess i am going to tear into trying to set the carbs next since i am waiting on another pick up coil to switch this one out with and i still need to clean up all the parts to reassemble the back end of the bike. Thank you guys for your help i feel like such a moron lol

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littlebeaver
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Re: !981 Goldwing Not firing correctly

Postby littlebeaver » Fri Apr 29, 2011 11:24 pm

I feel that way alot.. :lol:

wowimohsobored
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Re: !981 Goldwing Not firing correctly

Postby wowimohsobored » Fri Apr 29, 2011 11:31 pm

i meant coil pick up by the way lol here i go again thinkin...

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littlebeaver
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Re: !981 Goldwing Not firing correctly

Postby littlebeaver » Fri Apr 29, 2011 11:44 pm

where are you in KCK..I'm out by the Legends...Race track

wowimohsobored
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Joined: Tue Apr 26, 2011 12:34 am
Location: Kansas City Kansas
Motorcycle: 1981 GL1100

Re: !981 Goldwing Not firing correctly

Postby wowimohsobored » Fri Apr 29, 2011 11:47 pm

Olathe actually , most people have no idea where thats at but everyone knows kck lol

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littlebeaver
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Re: !981 Goldwing Not firing correctly

Postby littlebeaver » Sat Apr 30, 2011 12:11 am

Have you checked out the three yellow wire plug that comes out of the stator yet, if you have not be sure you have a look at that plug, the plug next to that one should also be tested, it goes to your pulse generator, check the ohms, have you done that yet.. I have learned a lot from my mechanic friend that lives in Turner, he's a really nice man..Knows his stuff for sure..and learned even more on this site and others....

wowimohsobored
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Re: 1981 Goldwing Not firing correctly

Postby wowimohsobored » Sat Apr 30, 2011 10:57 am

I have not checked it yet but i did read that its always got problems and its best to do away with it ? I will try to get a picture or two up of some of the progress.

wowimohsobored
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Re: 1981 Goldwing Not firing correctly

Postby wowimohsobored » Wed May 04, 2011 11:39 pm

Well a update , i got the bike running and tore the carbs down again pulled 3 of the 4 low idle jets out and had to clean them that way as i couldnt get them clean in the carbs and it was running around 1500 rpm , the next issue came up i noticed a pop out the left exhaust so after a compression test i had one cylinder with 65 psi, a quick head pull revealed a slightly bent valve bearly noticable to the naked eye so i purchased another head and i am awaiting a gasket set . The timing belts were in dire need of replacement so i am switchin them out as well we shall see by the end of the weekend i hope to have it all back together and runnin again

wowimohsobored
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Re: 1981 Goldwing Not firing correctly

Postby wowimohsobored » Wed May 11, 2011 10:10 pm

A little update on the wingster, after the low compression i bought a complete head off ebay did a valve lap job on it took the other head off and lo and behold it had been reworked at one time or another as it had different valve seals n it , so i lapped the valves on it as well new valve seals and gaskets all around , put in new timing belts went ahead and got another coil pickup off ebay and while i was at it a new starter. So all in all i got it fired up and runnin pretty good and got the carbs somewhat synced but after about 30 seconds of running i fouled the plugs so with a new set of plugs in it ran good for 30 seconds or so and fouled the second set. A little after thought and some quick checking with the drill bit i used on the idle jets resulted in about .023 so i am about .013 to large as all the searching i have came across the jets need to be .010 so tommorow i am going to try a little fix with some silver solder and the correct size drill bit.... The bike has been setting awhile and the gas tank was very very nasty......I used some purex laundry detergent and filled the tank with water, i hooked a jumper pack and battery charger up to the tank negative to the tank and positive to a 1/2'' bolt i used a cap off a paint can and drilled a hole in it and sat it in the float level hole...14 hours later and it looks like someone sandblasted the inside of the tank , i couldnt believe how amazingly clean it is ....the best part the reserve tube cleaned right out so once i get the idle jet issue taken care of i will be on the road and ready to go !!!! I cant wait ....




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