1988 GL 1500 CARBS


Information and questions on GL1500 Goldwings (1988-2000)
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rpc18
Posts: 3
Joined: Wed Mar 20, 2013 6:41 pm
Location: Sacramento, California
Motorcycle: 1988 GL1500

1988 GL 1500 CARBS

Postby rpc18 » Wed Mar 20, 2013 6:48 pm



I am replacing the carbs on a 1988 1500 I do not have the old ones. I bought a set off of e bay they said were for 1988. There a four cables attached to the carbs. I can only find three cables on the bike two from throttle and one from choke what, where and is there a fourth. Also pictures in the maual show a electric switch fro the cruise control disconnect hooked to the carb I bought one but do not see how it is hooked to the carbs any help will be appreciated



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Snowmoer
Posts: 51
Joined: Fri Jan 25, 2013 12:23 pm
Location: Yucca Valley, California
Motorcycle: 2012 GL 1800
1988 GL 1500
1977 GL 1000
1988 NX 650

Re: 1988 GL 1500 CARBS

Postby Snowmoer » Thu Mar 21, 2013 2:06 pm

I have an 88 and it only has three cables to the carbs. Two for the throttle, and one for the choke. The electric switch is near where the throttle cables are hooked up to the carb. When you close the throttle, the switch is tripped and turns off the cruse. The wire runs to the bank of connectors that are on the left side of the bike near the plastic plate around the fuel cap. I think it has a blue connector if I remember right.

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jlporter
Posts: 11
Joined: Thu Oct 04, 2012 5:56 am
Location: Zimmerman, MN, USA
Motorcycle: 1988 GL1500 in rebuild mode

Re: 1988 GL 1500 CARBS

Postby jlporter » Fri Mar 22, 2013 6:25 am

You have purchased a post 90 set of carbs. This is a good thing. But you will need to follow the post 90 diagrams in the book. I just completed the conversion so let me know if you need assistance.
jerry

rpc18
Posts: 3
Joined: Wed Mar 20, 2013 6:41 pm
Location: Sacramento, California
Motorcycle: 1988 GL1500

Re: 1988 GL 1500 CARBS

Postby rpc18 » Fri Mar 22, 2013 2:20 pm

thank you for the info. where can I find the instructions for the conversion and how well does it work should I just buy the right carbs

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jlporter
Posts: 11
Joined: Thu Oct 04, 2012 5:56 am
Location: Zimmerman, MN, USA
Motorcycle: 1988 GL1500 in rebuild mode

Re: 1988 GL 1500 CARBS

Postby jlporter » Fri Mar 22, 2013 3:00 pm

That would be up to you. I got a set of 96' off eBay because of the stories I have read on the 88-89 carbs giving hesitation from a stop. Mine had this - I tried all the other tips and none helped. Many have said changing the jets to the post 90' jets would fix the problem. I found a thread on another forum of a rider that just replaced the carbs with post 90 and problem was gone. I had just purchased this bike and was planning on tearing the bike down to get a paint job, do all maintenance that the OP had not done. Found the carbs for a good price, got them and started the conversion. Do you have a service manual? You will need one!
The post 90' does away with the altitude solenoid, has a different vacuum setup and a different cruise cancel set up. So there will require some logic understanding to get them mounted. if you have not rebuilt the carbs you should unless they are new.
Let me know your decision?
jerry

rpc18
Posts: 3
Joined: Wed Mar 20, 2013 6:41 pm
Location: Sacramento, California
Motorcycle: 1988 GL1500

Re: 1988 GL 1500 CARBS

Postby rpc18 » Mon Mar 25, 2013 9:42 am

Thanks Jerry

I have two different service manuals and neither say anything about the conversion can you tell me which manual has the information is it available on line

Thank you

Ron

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jlporter
Posts: 11
Joined: Thu Oct 04, 2012 5:56 am
Location: Zimmerman, MN, USA
Motorcycle: 1988 GL1500 in rebuild mode

Re: 1988 GL 1500 CARBS

Postby jlporter » Mon Mar 25, 2013 4:24 pm

There are no instructions on any conversions that I am aware of. Have you rebuilt the carbs yet? As far as cables the post 90 had the cruise cancel switch in the in the cruise valve assembly see fig 1 item 5. The 88 has the cruise cancel switch on the carb assembly see fig 2 item 17. The post 90 cruise actuator cable going to the rear of the carb assy. The 88 does not so the assemble on the left rear is not used. To do so you would need to obtain post 90 cruise actuator which has different cable and you would need to obtain post 90 cruise valve assembly. I found no value in changing these out.
You will need to pull the cruise cancel assemble fig. 1 the block on left containing item 8,11,17,18,22 and the screw shown from the 88 carbs and put on post 90 carbs and that will require you to gentle turn the fuel inlet pipe out of the way - do this slowly and you should have no problem. The 88 has an additional vacuum hose. If you have Clymer manual M505 for gl1500 1988-1992 go to pg 265 - this is the 88-89 vs pg 268 post 90. I used the 1992 for direction on how to plum the vacuum. I DeSmogged mine while I had it apart as one of my reed valves was bad. So I removed more vacuum hoses than you will need to do.
Not knowing your experience level - have you rebuilt carbs before? it's not at all hard if you can follow direction and use common logic.
If you have not rebuilt the carbs you should. The one tool you need and not just for this task is a manual impact driver. Many auto parts carry these. you will need to order 2 rebuild kits and if you are rebuilding the 88 you should get a new set of jets. One advantage of the post 90 is all jets are assessable where the 88 are not.
Much to take in before obtaining any parts. oh do not get the cheap rebuild kits on ebay - you never know if the jets are too long, too short or correct jetting. let me know and i'll look up where I got my jets and rebuild kits.
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lowriders
Posts: 3
Joined: Sat May 04, 2013 9:14 pm
Location: Spokane, Washington
Motorcycle: 88gl1500

Re: 1988 GL 1500 CARBS

Postby lowriders » Sun May 05, 2013 9:06 pm

on this topic, how do you go about desmogging and 88 gl? thx for any help

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jlporter
Posts: 11
Joined: Thu Oct 04, 2012 5:56 am
Location: Zimmerman, MN, USA
Motorcycle: 1988 GL1500 in rebuild mode

Re: 1988 GL 1500 CARBS

Postby jlporter » Mon May 06, 2013 6:06 am

You can find kits if you do a search. the kits are designed for the GL1500 Valkyrie but also works for the GW. You'll need a maintenance manual and some knowledge of vacuum logic. you'll have to remove the carbs and manifold to get to the reed valves. I installed a set of 96 carbs which deleted the altitude subsystem and more vacuums lines. I also changed out the water pump to a new 96 model and reworked the water system. replaced the decel system with a 96 version.
all this means no more maintenance problems with vacuum lines (I used silicon hose) or reed valves.
I'm sure there are others who have done this but do not talk about it for fear riders will suggest this increases smog into the environment. But forget that a faulty smog subsystem with bad reed valves increase the about of unfriendly gases.




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