Right block running lean


Information and questions on GL1500 Goldwings (1988-2000)
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kane67
Posts: 178
Joined: Tue Aug 18, 2015 2:15 pm
Location: Vantaa, Finland
Motorcycle: Honda GL1500-88

Right block running lean

Post by kane67 » Sun Aug 30, 2015 1:02 am



yesterday made oil change and replaced spark plugs, noticed that all right block plugs where white (clean but white) as left plugs are nice normal brown/grey.

Engine runs/idles nice, slight hesitation when driving off idle (lean would make sense?)
Cold start improved with new plugs.

Well, it means carburators has to be taken out for overhaul.
Just thinking what else to do when they are off...

- cleaning carbs
- Float adjustment check
- maybe one size bigger pilot jet
- pilot screw check/adjustment
- add o-ring under Vacuum piston (as was in one article here, did already acc pump more "sensitive")
- sync carb's

If there would be air leak, should I notice something as it runs nice...?

Br, kane



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RBGERSON
Posts: 2985
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Right block running lean

Post by RBGERSON » Sun Aug 30, 2015 8:21 am

Try adjusting first you need a long screw driver and access is from the front. Also spraying starter fluid or propane at the bottom of the carbs where all the vacuum lines and intakes are will Id a leak if you have one..the rpm's will kick up if the spray gets sucked into the cylinders. But if you have a spark leak..BOOM!!!!!so be careful.. Note there are a bunch of lines under the carbs and they do rot out at the bends..and a PITA to replace.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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kane67
Posts: 178
Joined: Tue Aug 18, 2015 2:15 pm
Location: Vantaa, Finland
Motorcycle: Honda GL1500-88

Re: Right block running lean

Post by kane67 » Sun Aug 30, 2015 12:02 pm

Do you mean adjusting PMS or sync carb's from the front? Sync maybe?
By the way, is it long phillips screwdriver?

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ct1500
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Location: Glastonbury,CT
Motorcycle: 1988 GL1500
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Re: Right block running lean

Post by ct1500 » Sun Aug 30, 2015 7:09 pm

What model year are we discussing here?
Local and need repair help with your 1500, Valkyrie or ST please click contact
Nothing leaves my shop till its' perfect
This is what I do

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kane67
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Joined: Tue Aug 18, 2015 2:15 pm
Location: Vantaa, Finland
Motorcycle: Honda GL1500-88

Re: Right block running lean

Post by kane67 » Sun Aug 30, 2015 11:09 pm

1988 model. Ok, found some articles and pics where to look sync screw.
I have a diy manometer what I've used with my other bike in past.

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kane67
Posts: 178
Joined: Tue Aug 18, 2015 2:15 pm
Location: Vantaa, Finland
Motorcycle: Honda GL1500-88

Re: Right block running lean

Post by kane67 » Sun Sep 06, 2015 1:08 am

Adjusted right side, pms was open 3 1/2 so I set it to 4 (as it was lean).
Syncronised carbs, now idle off hesitation is gone.

I remember someone asked if -88 pms's are open 3 1/8 instead of 2 what my Haynes book says?
As mine was open 3 1/2 and still leanish.... hard to understand if 2 is default?

Off course there can be other things to overhaul in carbs but now it runs great, I just enjoy my cruiser...



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