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I just put an 87 set of carbs on my 85 wing and it will sort of crank and idle poorly but will not take throttle at all and only runs with choke on.
My question is i know the fuel inlets are bigger than on the 85 set is there anything i need to do to make this set work right with my 85, such as adjustments etc. I do know there is some kind of switch on the 87 set and not on the 85 set should that be plugged in anywhere?
the 87 set came off of a good running bike with about 37000 miles so i thought it would be fine.
Any help would be greatly appreciated

Jones183
 

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jones183 I'm not sure, but hang on someone with carb knowledge will help you soon.
 

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That switch you are refering is for the cruise control that came on the 87 model. It will not be used on your 85.
 

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Discussion Starter · #4 ·
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thanks I know there are some greater minds than mine with carbs
 

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Regarding your carb change....I was just wondering what waswrong with the original ones and how was the bike running?It might havebeen easier to refurbish those carbs instead of installing the 87 set. It is not really that difficult and with a little patience and a good shop book cleaning and re-setting can be accomplished in a relatively short time. ... As far as the 87set is concerned both the main and slow jets are different sizes than the 85, the pilot screw settings will be different , the float levels are the same. You will have to sync them etc.. you should be able to replace the jets with your old ones ( after cleaning them) folow the 85 settings in the book. There may be some trail and error but you should be able to make them work............GM
 

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Though you mentioned the new carb-set came off of a good running, low mileage bike, there's no mention of whether they sat for some time in between removal of the old and installation to the present.
Assuming they sat for a while in the open air, the symptoms sound awfully familiar to a varnished condition that need cleaning.
 

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beat me to it i was thinking the samething. maybe sat for a while before the install or they could just need to be sync'ed. vacume lines all on and did you use new orings?:baffled:
 

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Discussion Starter · #8 ·
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the bike ran ok at low speed but when you got up to 60 it was spitting and sputtering and would not hardly get to 70 and sounded like it was missing, and since the bike had not been taken care of I know it would be a pain. i have always done carb work but i had a bad experience with a concours and the multiple carbs syncing and just did not want to do it again.
also i talked to the service manager at the dealer who supposed to be a wing specialist told me that the kinks had been worked out of the 87's from 85 and if i could get the whole set that would be the way to go also that is what he would do if it was his, and it was a whole lot cheaper than the rebuild parts believe it or not.
 

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Discussion Starter · #9 ·
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I did pull them apart and clean them really good i did not pull the jets out but everything looked really good and clean. i blew every hole out and nothing was clogged i also used carb cleaner in every hole. I did not want to disturb the jets because i dont have the tool to re sync them. the guy i got them from told me they had not sat for very long and it appeared he was right when i opened them.
should they have gone in and run ok from the start. i am wondering if it could be something else when i was installing them. i am going home and putting the old set back on and see how it runs just to see if it is the carbs. thanks for the info
 

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Discussion Starter · #10 ·
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did not use new orings i assume on the intake tubes you mean. i did replace all of the hoses that were questionable however i noticed that on the main ignition box there appears to be a vacueem hose not connected would that come from the carb or the vac nipple on the #4 intake hose any idea. thank for the reply
 

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It has been my experience that carb problems usually appearat idle and lower rpm's/ speeds. ( not written in stonethough)When the bike gets up to speed and running on the main jets it usually smooths out and will run ok as opposed to yours that idles ok and runs good up to 60. Maybe there are other problems here . Have you checked plugs, caps,wires, coils...perhaps a timing belt is off a tooth, vac leak etc. etc. I think you are rightto re-install the old carbs and see how it runs. If it runs poorly check everything else before digging into the carbs.............
 

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I put a really crapped up set of carbs on my 87. They were made of 2 left banks and were loaded with crud and way out of sync.

The bike ran well enough to pass emmisions!

I think you have other problems, or have the vacuum hoses on wrong. Get the hose routing diagram from the service manual and check that first.

The ECU does have to have a vacuum hose hooked up, but I don't think that will cause the problems you're having.
 

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PM UbarW. I gave him a set of 87 carbs that he put on his 84 Aspy. I think he had to upgrade the fuel pump to an 87, also. It can be done with good results.
 

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Discussion Starter · #14 ·
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Thanks to everybody that replied. The info is very helpful. I have not had a chance yet to try any of those things bu will start tonight. All of you are great, hope to be riding soon the weather here this week is wonderful. I have been doing mechanic work all my life on cars but just started on bikes and thought i would have no trouble but they keep tricking me up with the 4 carbs and all it just seems like I cant get it all right, kind of frustrating when I have no trouble with cars and trucks.

Thanks Again

Roger
 
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