'87 gl1200 air cutoff valve proper assembly....


Information and questions on GL1200 Goldwings (1984-1987)
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leakyroof58
Posts: 69
Joined: Thu Jul 14, 2016 5:12 pm
Location: bemidji,mn
Motorcycle: '87 Aspencade
Sold: 1975 Kawi 900 Z1, Honda 350 Scrambler

'87 gl1200 air cutoff valve proper assembly....

Post by leakyroof58 »



OK, carb rack is out and I have new parts for the air cutoff valve.
The parts set came with a tiny O-ring, but my valve had no such
O-ring in it. NOR can I find a decent picture of the valve and how
it goes together. Randaaks has a description but no pictures and
I can't see how the O-ring would do anything in my valve ???
Youtube has a procedure for the 1100, but it's plainly different
than my 1200. Since the carb rack is a PIA to get out, I don't
want to do this wrong. Once is enough, thanks!
Thanks in advance for any help....



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virgilmobile
Posts: 9080
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: '87 gl1200 air cutoff valve proper assembly....

Post by virgilmobile »

as far as I recall,the tiny "O" ring sets in the casting next to the air cutoff valve.It seals the vacuum passage between the carb body and valve cover.


.
For a "once and done" project,Pre-test the carbs on the bench.Use a shop vac on each one to check the slide action.Fill with gas to check for leaks and measure each bowl's fuel for the same amount.
Pre-sync the throttle plates then a final sync on the bike.
Do remove the idle jet caps and tend to them also.

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leakyroof58
Posts: 69
Joined: Thu Jul 14, 2016 5:12 pm
Location: bemidji,mn
Motorcycle: '87 Aspencade
Sold: 1975 Kawi 900 Z1, Honda 350 Scrambler

Re: '87 gl1200 air cutoff valve proper assembly....

Post by leakyroof58 »

Thanks for your response virgill, but your valve once
again does not look like mine - no O-rings like
you show. Rest of parts are here and I think I'll
just go ahead without the O-ring, since my Clymer
manual makes no mention of it either. Then again,
this would not be the first error I have found in the
Clymer manual, if they omitted this part. Original
valve didn't have it, but I know others have been
in here 'playing' (hose from bottom of valve was
missing...). Therefore I didn't know if valve was
ever put back together right. Lots of variables on
a 30-year old bike I guess. Thanks again for your time.

User avatar
virgilmobile
Posts: 9080
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: '87 gl1200 air cutoff valve proper assembly....

Post by virgilmobile »

Well vacuum has to get to the back side of that diaphragm through some port to operate it.This is one method.Perhaps yours is a bit different casting.Can you post a picture of it and your "kit".



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