Air cutoff valve Oring issue on a 75' GL
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- Chrome Member
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- Joined: Sun Feb 21, 2016 7:36 pm
- Location: Delaware
Air cutoff valve Oring issue on a 75' GL
I am having a reoccurring issue with the air cutoff valve oring that is nearest to the air cleaner getting sucked into its intake port. I haven't had this issue before. Originally I used a dab of grease to hold them in place during install, then after about a tank of fuel the bike develops a slightly rough idle ( vacuum leak). I started to pull the carbs out of the bike when I find the O ring sucked in the port. I cleaned off any grease residue and used a light coating of aircraft sealer. Last night, same thing happens. This morning I pull the o ring out and put it back in place only to have it happen while driving it from my garage bay to the parking spot. The air cleaner is clean and clear. Not sure why it is doing this. Should I just clean it all up again and just use Hondabond ?
1977 GL1000, 1200 transplant, sold
1976 GL1000
1975 CB360T(in the family since new and restored)
1975 GL1000
1974 CB360
1961 T20 Tiger cub SL
1959 T20 Tiger cub S
03 Shadow Spirit 750
1976 GL1000
1975 CB360T(in the family since new and restored)
1975 GL1000
1974 CB360
1961 T20 Tiger cub SL
1959 T20 Tiger cub S
03 Shadow Spirit 750
- 5speed
- Honored Life Member
- Posts: 5311
- Joined: Sat Jul 11, 2015 2:37 pm
- Location: Nova Scotia Canada
Re: Air cutoff valve Oring issue on a 75' GL
it sounds like the air valve isn't clamping down all the way when you tighten the screws.
I would determine if that is happening and why before I stated adding goop to the o ring that quite possibly could get sucked into the valve.
I would determine if that is happening and why before I stated adding goop to the o ring that quite possibly could get sucked into the valve.
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)
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- Chrome Member
- Posts: 195
- Joined: Sun Feb 21, 2016 7:36 pm
- Location: Delaware
Re: Air cutoff valve Oring issue on a 75' GL
It shouldn't make it into the carbs due to the "flame screens" in the intake. I'll take another look at the mating surfaces when I get it home.
1977 GL1000, 1200 transplant, sold
1976 GL1000
1975 CB360T(in the family since new and restored)
1975 GL1000
1974 CB360
1961 T20 Tiger cub SL
1959 T20 Tiger cub S
03 Shadow Spirit 750
1976 GL1000
1975 CB360T(in the family since new and restored)
1975 GL1000
1974 CB360
1961 T20 Tiger cub SL
1959 T20 Tiger cub S
03 Shadow Spirit 750
- rcmatt007
- Treasurer
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- Joined: Fri Oct 21, 2005 12:48 pm
- My Album: http://www.ngwclub.com/gallery/v/wingmans/rcmatt007/
- Location: New River Valley, Virginia
Re: Air cutoff valve Oring issue on a 75' GL
I am with 5 speed.... once the thing is tightened down it should be stuck there... something must be not allowing it to tighten
-Rodger-
all it takes for evil to prosper is the want of a few good men to do nothing-Edmund Burke
The question is not how much time do you have, it is what you do with the time that you have Gandalf
"One of the greatest dignities of humankind is that each successive generation is invested in the welfare of each new generation." Fred Rodgers
"it takes 10,000 hours to become an expert" ancient saying
78 constantly modified/customized since 1978, BOTM June 2015 de-evolving this very moment viewtopic.php?f=30&t=65511
76 Ltd "cookies bike" ALMOST DONE
79 project, finished, FOR SALE
'86 1200 (Beth's)(FOR SALE) with motorvation sidecar (sidecar sold) , July 2017 BOTM
'17 HD Road king and 08 HD Heritage softail (Beth's) (FOR SALE). I guess you can say we have MBS
all it takes for evil to prosper is the want of a few good men to do nothing-Edmund Burke
The question is not how much time do you have, it is what you do with the time that you have Gandalf
"One of the greatest dignities of humankind is that each successive generation is invested in the welfare of each new generation." Fred Rodgers
"it takes 10,000 hours to become an expert" ancient saying
78 constantly modified/customized since 1978, BOTM June 2015 de-evolving this very moment viewtopic.php?f=30&t=65511
76 Ltd "cookies bike" ALMOST DONE
79 project, finished, FOR SALE
'86 1200 (Beth's)(FOR SALE) with motorvation sidecar (sidecar sold) , July 2017 BOTM
'17 HD Road king and 08 HD Heritage softail (Beth's) (FOR SALE). I guess you can say we have MBS
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- Chrome Member
- Posts: 195
- Joined: Sun Feb 21, 2016 7:36 pm
- Location: Delaware
Re: Air cutoff valve Oring issue on a 75' GL
I'll take a picture when I get it apart tonight. Hopefully my garage is not at the same 104 degree heat index that my shop is!
1977 GL1000, 1200 transplant, sold
1976 GL1000
1975 CB360T(in the family since new and restored)
1975 GL1000
1974 CB360
1961 T20 Tiger cub SL
1959 T20 Tiger cub S
03 Shadow Spirit 750
1976 GL1000
1975 CB360T(in the family since new and restored)
1975 GL1000
1974 CB360
1961 T20 Tiger cub SL
1959 T20 Tiger cub S
03 Shadow Spirit 750
-
- Chrome Member
- Posts: 195
- Joined: Sun Feb 21, 2016 7:36 pm
- Location: Delaware
Re: Air cutoff valve Oring issue on a 75' GL
Had a quick minute when I got in to pull the valve off and get a shot. I'll go back out after the sun goes down and check the straightness of the mating surfaces. I didn't see anything blatantly obvious causing an interference.
1977 GL1000, 1200 transplant, sold
1976 GL1000
1975 CB360T(in the family since new and restored)
1975 GL1000
1974 CB360
1961 T20 Tiger cub SL
1959 T20 Tiger cub S
03 Shadow Spirit 750
1976 GL1000
1975 CB360T(in the family since new and restored)
1975 GL1000
1974 CB360
1961 T20 Tiger cub SL
1959 T20 Tiger cub S
03 Shadow Spirit 750
- 5speed
- Honored Life Member
- Posts: 5311
- Joined: Sat Jul 11, 2015 2:37 pm
- Location: Nova Scotia Canada
Re: Air cutoff valve Oring issue on a 75' GL
what about the bottom of the valve?
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)
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- Chrome Member
- Posts: 195
- Joined: Sun Feb 21, 2016 7:36 pm
- Location: Delaware
Re: Air cutoff valve Oring issue on a 75' GL
The same as the bottom, except for the little bit of residue from the aircraft sealant I put on the orings to keep them in place. I have Dykem on the valve face now. When it dries, I'll mount it and see if there are any gaps.
1977 GL1000, 1200 transplant, sold
1976 GL1000
1975 CB360T(in the family since new and restored)
1975 GL1000
1974 CB360
1961 T20 Tiger cub SL
1959 T20 Tiger cub S
03 Shadow Spirit 750
1976 GL1000
1975 CB360T(in the family since new and restored)
1975 GL1000
1974 CB360
1961 T20 Tiger cub SL
1959 T20 Tiger cub S
03 Shadow Spirit 750
- 5speed
- Honored Life Member
- Posts: 5311
- Joined: Sat Jul 11, 2015 2:37 pm
- Location: Nova Scotia Canada
Re: Air cutoff valve Oring issue on a 75' GL
very strange if both surfaces are smooth..wonder if there is crude in one of the screw holes that is keeping it from tightening the valve downelslimdiablo wrote:The same as the bottom, except for the little bit of residue from the aircraft sealant I put on the orings to keep them in place. I have Dykem on the valve face now. When it dries, I'll mount it and see if there are any gaps.
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)
- ericheath
- Honored Life Member
- Posts: 9580
- Joined: Wed Jul 29, 2009 11:20 am
- Location: Winnipeg, Manituba
Re: Air cutoff valve Oring issue on a 75' GL
There should be a small recess for the orings to sit in. Perhaps the early bikes didn’t have this? Or someone planed it off?
Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
- ericheath
- Honored Life Member
- Posts: 9580
- Joined: Wed Jul 29, 2009 11:20 am
- Location: Winnipeg, Manituba
Re: Air cutoff valve Oring issue on a 75' GL
Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
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