GL1000 backfiring


Information and questions on GL1000 Goldwings (1975-1979)
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scotterichmond
Posts: 613
Joined: Fri May 06, 2011 3:49 pm
Location: Marblemount,wa
Motorcycle: 1975 GL1000
[img]http://images.goldwingdocs.com/scotterichmond_32376/Modestly_restored_1975_GL1000_750/engine_repainted_even_new_embl_3919.jpg[/img]

GL1000 backfiring

Postby scotterichmond » Thu Sep 20, 2012 8:12 am



Working on a friends new to him bike. most of you know this is not my first GL1000 I have worked on.
I've done the carbs and points( set as per Randakk), air cleaner is new,timiming belts look new and in time. fuel filter good too. Checked valve adjustment,(was right on) I have a bad (loud ) explosion when opening the throttle and hesitates. Not even wanting to take it out and test ride ( I like to make round trips)

I am suspecting the condensor, I believe if it were bad it would do this. I forgot how to check one though. and I have one I "think" is a good spare, but want to test it to be sure. (they are expensive to buy)

And thoughts ? would you suspect the condensor too?

Scott



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scotterichmond
Posts: 613
Joined: Fri May 06, 2011 3:49 pm
Location: Marblemount,wa
Motorcycle: 1975 GL1000
[img]http://images.goldwingdocs.com/scotterichmond_32376/Modestly_restored_1975_GL1000_750/engine_repainted_even_new_embl_3919.jpg[/img]

Re: GL1000 backfiring

Postby scotterichmond » Thu Sep 20, 2012 12:49 pm

I'm sure this spare condensor is new (no marks from installing) so I am going to shange out the condensor and see if it helps. The points I took out were very pitted and transffered metal, and one of the new point sets is arcing.

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terryt
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Joined: Mon Jul 23, 2012 4:52 pm
Location: United Kingdom
Motorcycle: 1979 gl1000 trike

Re: GL1000 backfiring

Postby terryt » Thu Sep 20, 2012 1:30 pm

I would check the timing again. Leads on wrong late timing or carbs flooding. Condenser if faulty would give weak or no spark. It do tell you in the manual how to test the condenser

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scotterichmond
Posts: 613
Joined: Fri May 06, 2011 3:49 pm
Location: Marblemount,wa
Motorcycle: 1975 GL1000
[img]http://images.goldwingdocs.com/scotterichmond_32376/Modestly_restored_1975_GL1000_750/engine_repainted_even_new_embl_3919.jpg[/img]

Re: GL1000 backfiring

Postby scotterichmond » Thu Sep 20, 2012 1:41 pm

it does, but you need a special tester. points and timing check again, all good.

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terryt
Posts: 97
Joined: Mon Jul 23, 2012 4:52 pm
Location: United Kingdom
Motorcycle: 1979 gl1000 trike

Re: GL1000 backfiring

Postby terryt » Thu Sep 20, 2012 2:11 pm

scotterichmond wrote:it does, but you need a special tester. points and timing check again, all good.


have a look here it tells you how to test without a meter
http://wiki.answers.com/Q/How_do_you_te ... motorcycle

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scotterichmond
Posts: 613
Joined: Fri May 06, 2011 3:49 pm
Location: Marblemount,wa
Motorcycle: 1975 GL1000
[img]http://images.goldwingdocs.com/scotterichmond_32376/Modestly_restored_1975_GL1000_750/engine_repainted_even_new_embl_3919.jpg[/img]

Re: GL1000 backfiring

Postby scotterichmond » Thu Sep 20, 2012 2:15 pm

you are correct, I will do that . Just forgot I guess.

CRS I suppose

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terryt
Posts: 97
Joined: Mon Jul 23, 2012 4:52 pm
Location: United Kingdom
Motorcycle: 1979 gl1000 trike

Re: GL1000 backfiring

Postby terryt » Thu Sep 20, 2012 3:23 pm

scotterichmond wrote:you are correct, I will do that . Just forgot I guess.

CRS I suppose

just don't be holding the condenser in your hand when you do it.

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scotterichmond
Posts: 613
Joined: Fri May 06, 2011 3:49 pm
Location: Marblemount,wa
Motorcycle: 1975 GL1000
[img]http://images.goldwingdocs.com/scotterichmond_32376/Modestly_restored_1975_GL1000_750/engine_repainted_even_new_embl_3919.jpg[/img]

Re: GL1000 backfiring

Postby scotterichmond » Fri Sep 21, 2012 4:32 pm

I got it right finally.
Condensor did not help a thing,( it's new now though)
I checked my point gap again ( no beer this time ) wrong. put it on the high spot on the lobe.CK.
regapped reset timing( this time with paper in the opposite points) . fired it up.
purrs like a kitten and roars like a lion. sync is next and good to go.

I was just in too big a hurry, and not in the proper state of mind to do it right the first time.




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