carb adjustment 88 gl 1500


Information and questions on GL1500 Goldwings (1988-2000)
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wingthing88
Posts: 47
Joined: Mon Apr 15, 2013 6:00 am
Location: Indianapolis, Indiana
Motorcycle: 1988 gl1500

carb adjustment 88 gl 1500

Postby wingthing88 » Sat Oct 12, 2013 12:55 pm



Greeting fellow wing friends. I have another lazy mans question. I was wondering if there was someplace to hook up a handheld tach so I can properly adjust my carbs without taking everything apart to access the coil leads and tapping into them or buying a new inductive style tach(I have the oldschool tach/dwell meter). I've always adjusted carbs by ear but my ears aren't as good as they once were. My exhaust smells rich and I'm only averaging about 35 to 38 mpg. I've looked at all my wiring diagrams and haven't found any external tach leads. any help would be appreciated.



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ct1500
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Location: Glastonbury,CT
Motorcycle: 1988 GL1500
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Re: carb adjustment 88 gl 1500

Postby ct1500 » Sat Oct 12, 2013 6:53 pm

No easy access point I know of and your old meter will not read correctly because of the wasted spark ign system, fires every crank revolution. If you have to use RPM as an indicator a newer inductive meter capable with wasted spark is the way to go. RPM's always vary too much for me to use as an indicator.

What is the history of the bike, anyone ever been into the carbs, as set from factory if anything it would be slightly lean. Mixture screws should be set at maximum richness now (still too lean though) assuming no one been into carbs with jet change or float height adjustment.
This is what I do
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wingthing88
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Joined: Mon Apr 15, 2013 6:00 am
Location: Indianapolis, Indiana
Motorcycle: 1988 gl1500

Re: carb adjustment 88 gl 1500

Postby wingthing88 » Sat Oct 12, 2013 7:37 pm

Actualy you can use an old meter on D.I.S. systems you just have to do a little math. The history of the bike as I know it started a couple of years ago when I bought it. It had been sitting for 12 years with a full tank of what started as fuel. It only had 50k on it as far as I can find out I'm the only one that has ever been into the carbs. The bike runs almost perfect I just like to tinker and I want it to run better than perfect, I'm anal that way, I'm just trying to squeeze a little more mileage out of her. It idles rock steady no fluctuation in revs so a meter would work great I set them with vacuum guages but thought I would try the tach method.I have 30 years as an A.S.E. master tech diagnostics and drivability being my specialty so I like a little bit of a challenge. I was just looking for and easier way to do it by the book.

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ct1500
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Re: carb adjustment 88 gl 1500

Postby ct1500 » Sun Oct 13, 2013 12:11 am

Next time your carbs are off do this.

http://www.goldwingfacts.com/forums/2-g ... 500-a.html

And a quickie check of mixture.

viewtopic.php?f=14&t=17014
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

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wingthing88
Posts: 47
Joined: Mon Apr 15, 2013 6:00 am
Location: Indianapolis, Indiana
Motorcycle: 1988 gl1500

Re: carb adjustment 88 gl 1500

Postby wingthing88 » Sun Oct 13, 2013 7:34 am

Thanks for the tips. That gives me some clues. Someone has been into the carbs before there are no limiter caps and someone has changed the screws because they are slotted so its possible they have been rejetted. Also the cardboard thing is great it's a similer concept of old school looking for a vacuum leak with propane( yes i still have the tools to do this). I guess I spent too much time dealing with fuel injection and computer controls and forgot where it all came from.




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