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Author Topic: I need a bowl for a 77A.....  (Read 1483 times)

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Offline stinkfinger

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I need a bowl for a 77A.....
« on: October 04, 2011, 05:44:27 PM »
I need just 1 bowl for the carbs on my 77a.
Its the #1 bowl. Am i correct in saying the
#1,3+4 are the same?
It has a slow leak out the drain on bottom as if the drain screw
hasnt been tightened.
Ive tried changing out the drain screw/needle
and it makes no difference. When i put carb #1's drain screw
in a different carb(that carb) works fine. Somehow theres still a slow leak.
ive tried plugging and tracing it by blowing in the other
orifices and best i can come up with is it leaks either around the
 fitting of the brass overflow tube(inside bowl) or from around the drain
on the bottom(outside the carb body)
Ive worked on a hundred carbs and never seen anything like it.
Willing to pay a fair price or tade ya a different motorcycle part or?
Any ideas appreciated also,
Thanx
Tony
« Last Edit: October 04, 2011, 06:01:59 PM by stinkfinger »
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Offline raymond10078

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Re: I need a bowl for a 77A.....
« Reply #1 on: October 05, 2011, 06:33:28 AM »
I have read that the overflow tube itself can crack, leading to a slow leak.  One solution was heat shrink tubing, or other tubing forced over the overflow tube.  I've also read that some have brazed (or soldered) cracks closed.

I believe that the left two bowls differ from the right two (the orientation of the drain screw - pointing to the right or left).  The parts fiche show 2 of one, and 2 of another - so that's my theory.

Otherwise, that bowl, according to the parts fiche, is the same as from the following bikes:
1976 Honda  CB750A
1977 Honda  XL350
1977 Honda  CB750A
1977 Honda  CB750F
1977 Honda  CB750K
1977 Honda  CB550K
1978 Honda  XL350
1978 Honda  CB750A
1978 Honda  CB750K
1978 Honda  CB750F
1978 Honda  CB550K
Honda 650 CUSTOM (CB650C) 1980
Honda CB650 1980
Honda CB650 1979
Honda CRF100F 2006
Honda CRF100F 2008
Honda CRF100F 2005
Honda CRF100F 2004
Honda CRF100F 2009
Honda CRF100F 2007
Honda NSF100 2006
Honda XL100S 1983
Honda XL100S 1985
Honda XL100S 1984
Honda XL100S 1982
Honda XL100S 1979
Honda XL100S 1981
Honda XL100S 1980
Honda XR100 1984
Honda XR100 1983
Honda XR100 1982
Honda XR100 1981
Honda XR100R 1999
Honda XR100R 1990
Honda XR100R 1991
Honda XR100R 1992
Honda XR100R 1989
Honda XR100R 2000
Honda XR100R 1993
Honda XR100R 1994
Honda XR100R 1995
Honda XR100R 1996
Honda XR100R 1997
Honda XR100R 1998
Honda XR100R 1987
Honda XR100R 1986
Honda XR100R 1985
Honda XR100R 2003
Honda XR100R 2002
Honda XR100R 2001
Honda XR100R 1988
« Last Edit: October 05, 2011, 06:48:56 AM by kandrtech »
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1978 CB750A (upgrading very, very slowly)

Past bikes - Honda: SL350, CX650C, CB900C, CB1000C, CM450A; Kawasaki: several 1972 750 H2's; Suzuki: TC90J.

Bikes I want: CX650ED, a mid-sized japanese V-twin with ABS.

Offline stinkfinger

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Re: I need a bowl for a 77A.....
« Reply #2 on: October 05, 2011, 05:34:25 PM »
Thanx Kander

Tony
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Offline madmtnmotors

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Re: I need a bowl for a 77A.....
« Reply #3 on: October 06, 2011, 04:11:09 AM »
PM sent.
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TAMTF...


Wilbur



Projects:
"Evolution": http://forums.sohc4.net/index.php?topic=100352.0
"P.O. Debacle": http://forums.sohc4.net/index.php/topic,126692.msg1441661.html#msg1441661
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                          
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
                                    http://forums.sohc4.net/index.php/topic,48858.msg515204.html#msg515204
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Late model K7/K8/F2/F3 front sprocket cover removal: http://forums.sohc4.net/index.php/topic,178428.msg2072279.html#msg2072279
630 to 530 conversion: http://forums.sohc4.net/index.php/topic,180710.msg2094423.html#msg2094423

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