78 GL1000 Starting issues


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monkiesinhell
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78 GL1000 Starting issues

Postby monkiesinhell » Tue Sep 20, 2011 9:33 pm



I noticed lately that after the bike is warm the starter will turn like the battery is dead, but if I turn the kill switch off the starter turns freely. What could this be?



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virgilmobile
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Re: 78 GL1000 Starting issues

Postby virgilmobile » Wed Sep 21, 2011 9:33 am

Turns Ok when warm and the ignition killed?It must be related to the ignition.Timing too far retarded and firing the cylinder way before it's suppose to?

Does it still have points?There a bit finicky to set just right and need to be as close a possible to "dead on"

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landisr
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Re: 78 GL1000 Starting issues

Postby landisr » Wed Sep 21, 2011 9:40 am

Hmmm My first thought was that the starter needs attention. They can act like that when they get warm. But that doesn't explain why the motor spins freely with the kill switch "off". It sounds like the motor is 'fighting' the starter, and the only thing that comes to mind is that the timing is off, ie advanced too far. But it seems that would affect cold starting, too. :roll: I guess you can at least start with checking the timing. And check the advance mechanism while you're in there. That will give you something to do until some of the experts chime in here. :lol:

Ron in MI

PS. Another thought: Do you shut off the petcock when you shut the bike down overnight or whatever? And do you not close the petcock when just stopping for gas, running into the store or ??? If this is the case, perhaps after one of these quick stops a bad or misadjusted carb float is allowing gas to partially fill a cylinder causing it to 'hydraulic lock'. Check the engine oil for the smell of raw gas. Just poke a (clean) screwdriver, stick or whatever in there to get a sample.

Good luck, and be sure to let us know what you find the problem and fix.
Beam me up, Scotty. There's no intelligent life down here.

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landisr
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Re: 78 GL1000 Starting issues

Postby landisr » Wed Sep 21, 2011 9:42 am

Wow. Hi, V. Who'd of thunk after 11 days two people would reply at the exact same time? :D Sounds like we're about 180 on the timing deal, but I'll go with your wisdom.. :oops: :lol:

Ron
Beam me up, Scotty. There's no intelligent life down here.

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dingdong
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Re: 78 GL1000 Starting issues

Postby dingdong » Wed Sep 21, 2011 10:09 am

landisr wrote:Wow. Hi, V. Who'd of thunk after 11 days two people would reply at the exact same time? :D Sounds like we're about 180 on the timing deal, but I'll go with your wisdom.. :oops: :lol:

Ron


One of them is probably correct. :lol:
Tom

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virgilmobile
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Re: 78 GL1000 Starting issues

Postby virgilmobile » Wed Sep 21, 2011 10:52 am

I wouldn't think about hydro lock just yet.He did state it turns over ok when warm and no ignition.
Turn on the ignition and it barely cranks over like a dead battery.

When cold,it takes a bit to get the fuel mixture going where it will start up.After warm up,the motor and fuel system are primed and ready to fire quickly.A pre-detonation will try to jam the crank backwards loading the starter up.

Lastly,the point system on the gl1000 can be a daunting task to get right.And I do mean exactly right,not by the book.It is known as a split timing method.I can explain if needed.

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landisr
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Re: 78 GL1000 Starting issues

Postby landisr » Wed Sep 21, 2011 12:42 pm

Oops. 10-4 on the hydro lock. :oops: Brain fart.... :roll:

Ron

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virgilmobile
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Re: 78 GL1000 Starting issues

Postby virgilmobile » Wed Sep 21, 2011 12:51 pm

Hydro lock......Got caught by that more than once.On my own and on the site. :mrgreen:

Yes I have spent time checking the electrical system for a NO CRANK problem only to find a hydro lock.

and yes I do keep a plug wrench in my tool kit.

I also forget to cut off the fuel sometimes.

monkiesinhell
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Re: 78 GL1000 Starting issues

Postby monkiesinhell » Wed Sep 21, 2011 10:50 pm

Hey guys thanks for the replies. I also forgot to mention that my carburetors are badly out of sync. I will be synchronizing them tomorrow, and then I guess I'll check the points? What is the proper settings for these 1000s?

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virgilmobile
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Re: 78 GL1000 Starting issues

Postby virgilmobile » Thu Sep 22, 2011 9:07 am

Sync the carbs after you fix and set the points.

Keep this in mind.Setting the points can seem complex,but it's not if you remember one thing....

point gap....set the point gaps and move the base plate to set the timing. BY THE BOOK.
Its funny tho the base plate is moved to set the timing for one cylinder.the other cylinder timing is set by re-adjusting the point gap .

Heres the problem.first point gap and timing are perfect but to get the timing right on the other points you can only change the gap cause you cant move the base plate again.

The solution is to set them BY THE BOOK
THEN measure the point gap on each set of points.I usually find one is at .014" and the other at .018"
or something weird like that.
now the trick is called "split the difference" take 1/2 of the difference...in this case .014-.018=.004=.002" and add it to the smaller gap .014 +.002=.016"
Readjust the point gap of both points to the new setting of .016".then re-time it again.
you will find that both cylinders time on the mark and now have the same point gap.

The numbers I show are out of my head and yours may be different but the idea is the same.

Equal point gap is important because it affects the dwell angle,the amount of time that the points are open.Dwell angle,point gap,timing need to be the same for each set to maintain a good balance of ignition.Get it out of whack and it sounds like a bucket of bolts at a idle.

The same goes for the carb sync.
Here's a link for more reading...http://www.randakks.com/TechTip7.htm

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moffat
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Re: 78 GL1000 Starting issues

Postby moffat » Fri Sep 30, 2011 4:41 am

I have had this on my GL1000 and the battery was underperforming, it seemed as though it needed a rest!!! So I put a new battery on and it has not happened again.

goldtr6c
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Re: 78 GL1000 Starting issues

Postby goldtr6c » Sat Oct 01, 2011 6:04 pm

My 82 (fixed ignition) had this same symtom. It turned out to be worn brushes in the starter.

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virgilmobile
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Re: 78 GL1000 Starting issues

Postby virgilmobile » Sat Oct 01, 2011 10:07 pm

Lets clear up one important statement the rides said...."but if I turn the kill switch off the starter turns freely"......

That mention eliminates the battery,starter,wiring,lawn ornaments,and moon phase.

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moffat
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Re: 78 GL1000 Starting issues

Postby moffat » Sun Oct 02, 2011 9:11 am

Yes we have to be careful of people that the phases of the moon affect




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