90% there
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- Dirty Dave
- Silver Member
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- Joined: Thu Jul 19, 2012 6:27 pm
- Location: Montreal, Canada
90% there
Still chasing gremlins on my 79 that hasn't been running as it did
until the stator broke loose 5 years ago.
It's roadworthy but has an annoying stutter with slight backfire pops
while cruising. Have synced carbs (rebuilt) many times and checked
the air cutoff for problems. From red line to decel I got a loud single
backfire yesterday.
New plugs helped some and color is right with white insulators
and a good tan color on all four. Compression is good at 150 all
around.
Just looking for places to check. I can't do any more to the carbs
than I have done with complete tear down, soaking, ultrasonic
cleaning and replacement of gaskets & O rings etc. New Dyna S,
timed correctly. Pulls great at high revs on all four.
Any suggestions are appreciated.
until the stator broke loose 5 years ago.
It's roadworthy but has an annoying stutter with slight backfire pops
while cruising. Have synced carbs (rebuilt) many times and checked
the air cutoff for problems. From red line to decel I got a loud single
backfire yesterday.
New plugs helped some and color is right with white insulators
and a good tan color on all four. Compression is good at 150 all
around.
Just looking for places to check. I can't do any more to the carbs
than I have done with complete tear down, soaking, ultrasonic
cleaning and replacement of gaskets & O rings etc. New Dyna S,
timed correctly. Pulls great at high revs on all four.
Any suggestions are appreciated.
1978/9 GL1000
1997 Honda Valkyrie
2018 Kawasaki Z900 RS
1997 Honda Valkyrie
2018 Kawasaki Z900 RS
-
- Zinc Member
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- Location: Bonnie Scotland
Re: 90% there
Might sound daft, but is the fuel pump working correctly. If not you will get symptoms like low float height in the carbs. In my Suzuki I had this which gave fuel starvation and lean running type backfires. Very different bikes, but the Suzuki (usually) pulled well at high revs, but was lumpy at certain engine speeds (suzuki was a vacuum pump).
1976 GL1000 barnfind, not run since 1991. My first Goldwing, which joins my 1990 Suzuki VX800 in the stable.
- Dirty Dave
- Silver Member
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- Joined: Thu Jul 19, 2012 6:27 pm
- Location: Montreal, Canada
Re: 90% there
Worth looking into. Thank you for the possible direction.
So much knowledge/experience here.
So much knowledge/experience here.
1978/9 GL1000
1997 Honda Valkyrie
2018 Kawasaki Z900 RS
1997 Honda Valkyrie
2018 Kawasaki Z900 RS
- Sagebrush
- Run Executive
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Re: 90% there
How old are your coils and plug wires?
Dean Spalding
Raleigh, NC
"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe." - Albert Einstein
'82 Yellow GL1100
'81 Blue GL1100
My Gallery
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Raleigh, NC
"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe." - Albert Einstein
'82 Yellow GL1100
'81 Blue GL1100
My Gallery
My 1100 Build Thread
- CYBORG
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Re: 90% there
If you haven't, I would check the flow thru the fuel filter as well.
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200
1977 custom with 1200 engine
1985 gl1200
- Dirty Dave
- Silver Member
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Re: 90% there
Spark wires were next on my list although they were part of the Accel coil set
and not old. Filters were checked and clean.
Spark on all plugs but new wires will settle that question.
and not old. Filters were checked and clean.
Spark on all plugs but new wires will settle that question.
1978/9 GL1000
1997 Honda Valkyrie
2018 Kawasaki Z900 RS
1997 Honda Valkyrie
2018 Kawasaki Z900 RS
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Re: 90% there
Are you still using the factory Bakelite spark plug caps ? If so, you should check the resistance across them, should be less than 5k.
Red 1976 oe owner
1976 LTD restored
1980 CBX , in the que, to fix the ignorant heavy handed owner
1981 CBX
1977 CB750 K7
2014 FJR OE owner, sold
1980 GL1100
1984 GL1200 naked
1969 CL350, in the que
1976 LTD restored
1980 CBX , in the que, to fix the ignorant heavy handed owner
1981 CBX
1977 CB750 K7
2014 FJR OE owner, sold
1980 GL1100
1984 GL1200 naked
1969 CL350, in the que
- Dirty Dave
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Re: 90% there
No.
After market wires & caps that I will be updating regardless.
After market wires & caps that I will be updating regardless.
1978/9 GL1000
1997 Honda Valkyrie
2018 Kawasaki Z900 RS
1997 Honda Valkyrie
2018 Kawasaki Z900 RS
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- Zinc Member
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- Location: New Zealand
Re: 90% there
If those intake rubbers are hard you may have a slight vacuum leak , I soaked mine in , oil of wintergreen and isopropyl alcohol , I wasn't sure if the mix would upset the bond so I only put them in like 18mm depth and checked them daily did mine for 3 days 4 days would be better . Alot better ,got my 4th cyl working.
76 GL1000 ,73 Norton mk5 , 75 Triumph T160 , 49 Matchless G80 500 rigid ,and
X4 76 HondaTL250s
X4 76 HondaTL250s
- Whiskerfish
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Re: 90% there
Yea I would concentrate on vacuum leaks. Make certain the engine is at full temp and tighten down the intake clamps about as far as you can.
"Agreement is not a requirement for Respect" CDR Michael Smith USN (Ret) 2017
"The book is wrong, this whole Conclusion is Fallacious" River Tam
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2008 GL1800 IIIA "TH3DOG"
1984 GL1200 Standard
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
Psst. oh and by the way CHANGE YOUR BELTS!!!!
"The book is wrong, this whole Conclusion is Fallacious" River Tam
"Yea I do dance awkwardly, and I am having more fun than you" Taylor Swift
2008 GL1800 IIIA "TH3DOG"
1984 GL1200 Standard
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
Psst. oh and by the way CHANGE YOUR BELTS!!!!
- pidjones
- SUPER BIKER!!!!
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Re: 90% there
Maybe even take a second look that you didn't pinch an intake runner o-ring? They can sneak out of the groove into the head when assembling. I use a coat of vacuum grease to hold them in place.
"Love 'em all.... let God sort 'em out!"
Ex 2006 GL1800 - the Black Pearl SOLD! to make room for:
2021 Can-Am Spyder RT Limited Dark Chalk Metallic
1975 Red GL1000 project - ex Pistol Pete project
1972 Triumph T150V Trident rescue - finished and FOR SALE!
1976 Yamaha RD400c
1978 GL1000 with '75 engine - the Hunley
Ex 1978 GL1000
Ex 1979 GL1000
Ex '79 CB750F rat bike
Ex '86 SEi
Ex '77 GL1000
Ex '76 RD400
Ex '72 Penton 125 set up for flat track
Ex '73 RD250
Ex '68 TR6C - chopped
Ex 2006 GL1800 - the Black Pearl SOLD! to make room for:
2021 Can-Am Spyder RT Limited Dark Chalk Metallic
1975 Red GL1000 project - ex Pistol Pete project
1972 Triumph T150V Trident rescue - finished and FOR SALE!
1976 Yamaha RD400c
1978 GL1000 with '75 engine - the Hunley
Ex 1978 GL1000
Ex 1979 GL1000
Ex '79 CB750F rat bike
Ex '86 SEi
Ex '77 GL1000
Ex '76 RD400
Ex '72 Penton 125 set up for flat track
Ex '73 RD250
Ex '68 TR6C - chopped
- 5speed
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Re: 90% there
easy way to check for a vacuum leak is to start the bike and spray brake cleaner around the carb rack, intake manifolds..or you can use a propane torch...just don't light it.
if the bike idles up..you found your leak
if the bike idles up..you found your leak
1982 1100 standard. (sold)
1986 Yamaha FJ1200
2000 Yamaha Roadstar
1976 GoldWing. running but not on the road
1978 Goldwing. future cafe project.
2019 Can-Am ryker (boss's new ride)
2002 Shadow American Classic(sold)
1983 Shadow 500. (sold)
1986 Yamaha FJ1200
2000 Yamaha Roadstar
1976 GoldWing. running but not on the road
1978 Goldwing. future cafe project.
2019 Can-Am ryker (boss's new ride)
2002 Shadow American Classic(sold)
1983 Shadow 500. (sold)
- Dirty Dave
- Silver Member
- Posts: 716
- Joined: Thu Jul 19, 2012 6:27 pm
- Location: Montreal, Canada
Re: 90% there
Haven't checked with you guys for a while.
Thanks for the ideas. I checked intake O-rings when putting carbs back in
but had the hardened rubber intake rubbers might need rejuvenating.
Had them off & on with a heat gun.
I knew about the wintergreen/alcohol trick but never tried it.
Great ideas
Thanks for the ideas. I checked intake O-rings when putting carbs back in
but had the hardened rubber intake rubbers might need rejuvenating.
Had them off & on with a heat gun.
I knew about the wintergreen/alcohol trick but never tried it.
Great ideas
1978/9 GL1000
1997 Honda Valkyrie
2018 Kawasaki Z900 RS
1997 Honda Valkyrie
2018 Kawasaki Z900 RS
- LuckyEddie
- Billet Alum. Member
- Posts: 217
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- Location: Middleville, MI.
Re: 90% there
90% of carb problems are electrical.
I would be looking at the ignition system.
I would be looking at the ignition system.
LuckyEddie
1978 GL1000 Supercharged (Avitar)
1976 GL1000
1980 XS1100LG
1982 XV750J
1981 XV920RH
1978 GL1000 Supercharged (Avitar)
1976 GL1000
1980 XS1100LG
1982 XV750J
1981 XV920RH
- Fred Camper
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Re: 90% there
I have a similar experience as LuckyEddie above. When I took my car to a mechanic at 17 years of age, and told him what I had tried, he communicated that the carburetor should be in the bottom of the oil pan as they are not the first thing to go wrong. He said they should not be on top. The electrical system is often the problem that folks try to fix with the carburetor and that seldom works. My car had a distributor made with pressed metal that wobbled. I do try to be sure the electrical is sound first now.
Proud member of the NGW Cartel (Rochester MI)
1977 GL1000 BADDOG (April 2012 BOTM)
1976 LTD - '993 LTD...and so it begins'
You should remember that it's peace of mind you're after and not just fixing the machine. R.Pirsig
1977 GL1000 BADDOG (April 2012 BOTM)
1976 LTD - '993 LTD...and so it begins'
You should remember that it's peace of mind you're after and not just fixing the machine. R.Pirsig