1976 GL1 is farting :)

Discuss everything about Honda GoldWing. Feel free to ask any question related to GoldWing.

Moderators: CYBORG, Oldewing, robin1731, Forum Moderators

Post Reply
Thomas44
Tin Member
Tin Member
Posts: 16
Joined: Mon Jul 10, 2017 3:41 am
Location: France

1976 GL1 is farting :)

#1

Post by Thomas44 »

Hi,

Can someone tell me what causes this "pops" ?

https://www.youtube.com/watch?v=_7hW3WgtFDc

I know that cylinder n°2 don't fire as it should because its exhaust pipe is 50% colder than the others (I use an infrared thermometer gun to see that).

Could it be a bad timing (only did a static timing) ?

Thanks for the help.
1976 GL 1000 Jaune sulfure.
User avatar
robin1731
Membership Admin
Membership Admin
Posts: 21724
Joined: Mon May 29, 2006 8:31 am
Location: Decatur, Indiana

Re: 1976 GL1 is farting :)

#2

Post by robin1731 »

Did it just start this? Start after you did something? Have you had the carbs off? Have the carbs been synced? Have you done anything to fix it?

Could be a few things but other questions need answered first. ;)

.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
Thomas44
Tin Member
Tin Member
Posts: 16
Joined: Mon Jul 10, 2017 3:41 am
Location: France

Re: 1976 GL1 is farting :)

#3

Post by Thomas44 »

Carbs should be OK (cleaned, new seals, float ball level checked ...).

They are roughly synced ...

Coils, wires, plugs and spark plugs are OK.

Compressions are OK.

The problem started after new breaker points installation and static timing procedure.

I rode the bike today and it runs OK (good acceleration, speed ...).
I guess it could be even better but I have no point of comparison.

Maybe I'll tweek "the split the difference" stuff more.
I hope I don't have a tooth off on the belts ...
1976 GL 1000 Jaune sulfure.
User avatar
scootsx2
True Blue Steel Biker
True Blue Steel Biker
Posts: 2485
Joined: Mon Jun 07, 2010 12:52 pm
Location: St. Louis, Missouri USA

Re: 1976 GL1 is farting :)

#4

Post by scootsx2 »

If it indeed started after installing new points then I would revisit that procedure in detail and make sure it's spot on.
1975 GL1000 Sidecar Outfit
1982 CX500-based Trident ex-Police Trike
2001 GL1800 MotorTrike
2006 Vespa LX150
1956 Francis-Barnett Falcon 74
195x Solex 1700
196x Solex 2200

St. Louis, MO

The dude abides.

Brothers of the Third Wheel - Gateway Chapter http://www.btw-trikers.org
Vintage Japanese Motorcycle Club http://www.vjmc.org
Francis-Barnett Owners Club http://www.francis-barnett.co.uk/
Antique Motorcycle Club of America http://www.antiquemotorcycle.org/
Vintage Motor Cycle Club http://www.vmcc.net
British Motorcycle Charitable Trust http://www.bmct.org/
VeloSolex Club UK http://www.velosolexclubuk.com/
User avatar
Whiskerfish
President
President
Posts: 36852
Joined: Thu Feb 16, 2006 9:34 pm
My Album: http://www.ngwclub.com/gallery/v/wingmans/whiskerfish/
Location: Norfolk Va

Re: 1976 GL1 is farting :)

#5

Post by Whiskerfish »

Miss at idle could be quite a few things. Everything from a weak battery up to mechanical issues in the engine. But yes if it just started then revisit the last thing done first.
"Agreement is not a requirement for Respect" CDR Michael Smith USN (Ret) 2017
"The book is wrong, this whole Conclusion is Fallacious" River Tam
2008 GL1800 IIIA "TH3DOG"
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
and a whole garage full of possibilities!!

Psst. oh and by the way CHANGE YOUR BELTS!!!!
raiddrten
Billet Alum. Member
Billet Alum. Member
Posts: 218
Joined: Wed Oct 25, 2017 7:14 pm

Re: 1976 GL1 is farting :)

#6

Post by raiddrten »

I hesitate to come in here as a newbie, but i really like to just use a timing light as a spark checker. The timing light can spot a weak spark event. occasional missing spark events, or a no spark condition. It does this with the wires hooked up and the bike under compression, so that is under real world conditions. In short, you can see more with the light than you can hear with your ears. Then you can usually answer the question, "Is it the spark timing or is it the carbs?" "Do i have a bad wire connection on one wire or is it something else?"

I do not even use my [Harbor Freight ] timing light for its intended purpose as I do not trust the loosey goosey timing advance feature.

I can tell you that a timing light helped us through a 'comes and goes" condition with a pulse generator on a V-4 Honda that had a very good outcome. it saved us guessing the cause and hanging expensive parts on the bike.
Thomas44
Tin Member
Tin Member
Posts: 16
Joined: Mon Jul 10, 2017 3:41 am
Location: France

Re: 1976 GL1 is farting :)

#7

Post by Thomas44 »

I'm quite sure the problem doesn't come from the #2 carb.

I already switched wire #2 and #1 to check if the problem comes from the wire/plug/spark plug and cylinder #1 kept on running OK.

I have a cheap strob light that I was supposed to use for the dynamic timing (obviously).
I try to use it with no luck because, let's be honest, you can't see in the "view" hole.
If I have to use it , I'll make a mark for F 1 and F 2 on the cam pulley.

I guess my best bet is timing.
What bothers me is that I have almost 6 to 7 degrees to divide.
Right now on cylinders #1 and #2, I Have one cylinder 2 degrees after -F 1- and the other one 4 degrees before.
On cylinders #3 an #4, I have one 3 degrees before -F 2- and the other one 3 degrees after.

Thanks for the input anyway.
To be continued ...
1976 GL 1000 Jaune sulfure.
User avatar
gltriker
Honored Life Member
Honored Life Member
Posts: 5053
Joined: Fri Sep 24, 2010 9:11 pm
Location: central NY State

Re: 1976 GL1 is farting :)

#8

Post by gltriker »

from your post#3
quote " Carbs should be OK (cleaned, new seals, float ball level checked ...).

They are roughly synced ... "


How close to correctly idle synchronized would that be? ......Bench synched, only? :-?
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
User avatar
robin1731
Membership Admin
Membership Admin
Posts: 21724
Joined: Mon May 29, 2006 8:31 am
Location: Decatur, Indiana

Re: 1976 GL1 is farting :)

#9

Post by robin1731 »

gltriker wrote:from your post#3
quote " Carbs should be OK (cleaned, new seals, float ball level checked ...).

They are roughly synced ... "


How close to correctly idle synchronized would that be? ......Bench synched, only? :-?
Yeah, I'm waiting on that to be set correctly and the points before we can really make any guesses. ;)

Lot's of guys have had carbs that "should" have been ok that were not close

.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
User avatar
gltriker
Honored Life Member
Honored Life Member
Posts: 5053
Joined: Fri Sep 24, 2010 9:11 pm
Location: central NY State

Re: 1976 GL1 is farting :)

#10

Post by gltriker »

Ok tumb2
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
Thomas44
Tin Member
Tin Member
Posts: 16
Joined: Mon Jul 10, 2017 3:41 am
Location: France

Re: 1976 GL1 is farting :)

#11

Post by Thomas44 »

gltriker wrote:How close to correctly idle synchronized would that be? ......Bench synched, only? :-?
Checked with an homemade carb synchronizer :mrgreen:

Image
1976 GL 1000 Jaune sulfure.
Thomas44
Tin Member
Tin Member
Posts: 16
Joined: Mon Jul 10, 2017 3:41 am
Location: France

Re: 1976 GL1 is farting :)

#12

Post by Thomas44 »

It had something to do with the timing.

https://www.youtube.com/watch?v=XfnlAq8T5Cw

You still can hear some light detonations in the left muffler but way quieter than before.

The weather forbid any road test but It should be OK.

Cylinder #2 is now slightly hotter than the others (maybe a little too lean ?)
1976 GL 1000 Jaune sulfure.
User avatar
LuckyEddie
Billet Alum. Member
Billet Alum. Member
Posts: 216
Joined: Mon Jun 22, 2009 7:42 am
Location: Middleville, MI.

Re: 1976 GL1 is farting :)

#13

Post by LuckyEddie »

Remove the points cover and make sure the wire connection to the points is not grounded against (or even close) to the housing. That will interrupt the spark, build up unburned fuel and occasionally one will get through and touch off the load (popping).
There is no such thing as close when synchronizing carbs.
Good luck.
LuckyEddie

1978 GL1000 Supercharged (Avitar)
1976 GL1000
1980 XS1100LG
1982 XV750J
1981 XV920RH
Don R
Silver Member
Silver Member
Posts: 792
Joined: Thu Feb 26, 2015 2:53 am
Location: West Central Illinois

Re: 1976 GL1 is farting :)

#14

Post by Don R »

I'd be willing to bet it's a lean pilot jet. Timing will make it better or worse.
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.
User avatar
robin1731
Membership Admin
Membership Admin
Posts: 21724
Joined: Mon May 29, 2006 8:31 am
Location: Decatur, Indiana

Re: 1976 GL1 is farting :)

#15

Post by robin1731 »

Don R wrote:I'd be willing to bet it's a lean pilot jet. Timing will make it better or worse.

If that is the case it is just masking the problem, not fixing it.

Reading this, "The problem started after new breaker points installation and static timing procedure." it points to the points/ignition. As always, if you develop a new problem always go back to the last thing you did.

.

.
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
Randakk approved Carb Rebuilder
Post Reply
  • Similar Topics
    Replies
    Views
    Last post

Return to “GoldWing Tech Discussions”