Found A Hole In One Of The Carbs ?
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- Dr. Frankenstein
- Silver Member
- Posts: 721
- Joined: Sun Nov 10, 2019 7:22 am
- Location: Charlottesville, VA
Found A Hole In One Of The Carbs ?
In the process of boiling and cleaning my 755A carbs, I found this in one of the throats - that jagged hole in the middle.
What bothers me is that none of the others have this, and it doesn't look like it's supposed to be there:
DSCN1557 by Dr. Frankenstein1, on Flickr
So I flipped it over and saw this, too - another jagged hole in the middle recess:
DSCN1554 by Dr. Frankenstein1, on Flickr
I blew some air through it, and it does come out the other hole. None of the other carbs have this hole here, and it sure doesn't look like it's supposed to be there...or is it? And if not, is there a fix for this? I was thinking a small dab of JB Weld, pressed in and smoothed out.
And here's what I found when I cleaned out my engine sump - pretty nasty. I put the screens in vinegar though and they cleaned up like new:
DSCN1544 by Dr. Frankenstein1, on Flickr
What bothers me is that none of the others have this, and it doesn't look like it's supposed to be there:
DSCN1557 by Dr. Frankenstein1, on Flickr
So I flipped it over and saw this, too - another jagged hole in the middle recess:
DSCN1554 by Dr. Frankenstein1, on Flickr
I blew some air through it, and it does come out the other hole. None of the other carbs have this hole here, and it sure doesn't look like it's supposed to be there...or is it? And if not, is there a fix for this? I was thinking a small dab of JB Weld, pressed in and smoothed out.
And here's what I found when I cleaned out my engine sump - pretty nasty. I put the screens in vinegar though and they cleaned up like new:
DSCN1544 by Dr. Frankenstein1, on Flickr
- ericheath
- Honored Life Member
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- Location: Winnipeg, Manituba
Re: Found A Hole In One Of The Carbs ?
I believe that hole is for the vacuum signal to the air cutoff valve. One of your float bowls has a port there and it needs to mate with that carb to get a proper signal to air cutoff valve. It enriches the mix on deceleration to prevent backfires.
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
- Fred Camper
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Re: Found A Hole In One Of The Carbs ?
Yup, it is suppose to be there. What Momma Honda declares as a hole, no one shall doubt.
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
- Dr. Frankenstein
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- Joined: Sun Nov 10, 2019 7:22 am
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Re: Found A Hole In One Of The Carbs ?
Whew, Thanks! OK, Good to know!
- Sidecar Bob
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- Location: Kawartha Lakes, Ontario
Re: Found A Hole In One Of The Carbs ?
And that isn't your engine sump. The sump is the bottom part of the engine where the oil runs down to so the oil pump can pick it up and re-circulate it (that's why these are called "wet sump" engines).
The part in your pic is what Honda calls the "Breather Chamber".
The part in your pic is what Honda calls the "Breather Chamber".
Mr. Honda ('83 GL1100/Dnepr) summer How a motorcycle evolves thread
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"A guy with two sidecars can't be all bad." - Cookie
Another guy with two sidecars..... Hmmmm... must be something to that....
The Famous Eccles ('84 CX650EI/VeloUral) winter Never Ending Build (CX500forum)
Click: Colour schematics for all GL1000 & GL1100 and GL1200 standard models plus instructions on how to download the full size version
"A guy with two sidecars can't be all bad." - Cookie
Another guy with two sidecars..... Hmmmm... must be something to that....
- andorragl
- Cast Iron Member
- Posts: 81
- Joined: Fri Sep 27, 2013 5:55 pm
- Location: Andorra
Re: Found A Hole In One Of The Carbs ?
I had the same problem in three of four carbrs. In my case it was after an ultrasonic cleaning.
Here you can take a look https://www.ngwclub.com/forum/viewtopic.php?f=1&t=65027
I can only tell you that the bike works well.
Here you can take a look https://www.ngwclub.com/forum/viewtopic.php?f=1&t=65027
I can only tell you that the bike works well.
1976 GL1000 LTD
1995 VT1100C2 ACE
2003 CB1300F1 SUPER FOUR
1995 VT1100C2 ACE
2003 CB1300F1 SUPER FOUR
- pidjones
- SUPER BIKER!!!!
- Posts: 3237
- Joined: Wed May 22, 2013 4:06 pm
- Location: East TN
Re: Found A Hole In One Of The Carbs ?
Would be great to update and close out that thread, then.andorragl wrote:I had the same problem in three of four carbrs. In my case it was after an ultrasonic cleaning.
Here you can take a look https://www.ngwclub.com/forum/viewtopic.php?f=1&t=65027
I can only tell you that the bike works well.
"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
- andorragl
- Cast Iron Member
- Posts: 81
- Joined: Fri Sep 27, 2013 5:55 pm
- Location: Andorra
Re: Found A Hole In One Of The Carbs ?
I'm sorry I completely forgot to report and close this thread.pidjones wrote:Would be great to update and close out that thread, then.andorragl wrote:I had the same problem in three of four carbrs. In my case it was after an ultrasonic cleaning.
Here you can take a look https://www.ngwclub.com/forum/viewtopic.php?f=1&t=65027
I can only tell you that the bike works well.
I finally mounted the carburetors and to this day they are working perfectly.
I've no idea how can I close it.
1976 GL1000 LTD
1995 VT1100C2 ACE
2003 CB1300F1 SUPER FOUR
1995 VT1100C2 ACE
2003 CB1300F1 SUPER FOUR
- pidjones
- SUPER BIKER!!!!
- Posts: 3237
- Joined: Wed May 22, 2013 4:06 pm
- Location: East TN
Re: Found A Hole In One Of The Carbs ?
Your comment pretty well closes it. Just a report of problem solved and how lets others that search for "hole in carb" know this was resolved.
"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
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