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The Vintage Japanese Motorcycle Owners Group: Discussion Forums

Vintage Japanese Motorcycle Owners Group :: View topic - 80 GS750L carburetors


80 GS750L carburetors

 
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Kenjobb
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Joined: Jun 07, 2017
Posts: 3

PostPosted: Sat Jun 10, 2017 9:06 am    Post subject: 80 GS750L carburetors Reply with quote

Is there a trick to getting the carbs seated back into the air box? I can get the outside carbs to seat decently but the middle two are really giving me problems, especially on the bottom.
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dorT500
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Joined: Jul 10, 2008
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Location: Galveston County, Texas

PostPosted: Sat Jun 10, 2017 9:52 am    Post subject: Reply with quote

Is it a spanning problem, or hard, misshapen/shrunken boots?

If it might be just a procedural 'trick', you might check over at GS Resources website for some quick help.

If the latter.......Been there. Rant Not on that particular bike but the todays gasoline seems to contribute to the dismise of less modern rubber engine components. I suppose you could try boiling the boots that are giving you trouble in plain water one at a time for twenty seconds or more and see it that will help..........or you might enter keyword 'wintergreen' into the VJMOG search engine for some more info.....seems to be mixed results.

Life is too short for this kind of frustration and though I have been known not to practice what I preach once in a blue moon......and used Gorilla brand black duct tape Embarassed in the interim until I come around and fork up the money for new vintage rubber that will have to be replaced again in a year or so because of the ethanol. Maybe this is the best way for you Smile Arrow http://www.ebay.com/itm/Air-box-to-Carburetor-Carb-Boots-GS750-GS1000-GS1100-See-Notes-Airbox-P121-/231975516674?fits=Year%3A1980%7CMake%3ASuzuki%7CModel%3AGS750L&hash=item3602d17a02:g:06YAAOSwvUlWs72a&vxp=mtr


Good Luck and Welcome to the VJMOG

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Kenjobb
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PostPosted: Sat Jun 10, 2017 10:48 am    Post subject: Reply with quote

The rubber is in good shape. It's an 80 with just under 17k on the clock and the carbs were nowhere near as dirty as I was expecting. She'll fire right up but with the slight air leak from the boots it won't stay running. If I got them mostly seated with the air filter on would that create the needed vacuum? I was starting it with the air box wide open.
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dorT500
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Location: Galveston County, Texas

PostPosted: Sat Jun 10, 2017 11:19 am    Post subject: Reply with quote

According to one of these replies at the GS Resources, vacuum for the vacuum operated fuel petcock is from the #2 carb vacuum port. I think a good inspection of this line and other lines for splits/cracks would be in order.

Read on....there may be something else in this thread that may help........

http://www.thegsresources.com/_forum/archive/index.php/t-190196.html

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Kenjobb
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PostPosted: Mon Jun 12, 2017 12:53 pm    Post subject: Reply with quote

The rubber and lines are fine. She is up and running and riding now but I'm having a slight issue with cold starts. She doesn't want to fire up but a little shot of starting fluid in the air box gets her going and it's fine. Then once she's running I hear a decent ticking coming from the right side of the engine. Valves out of adjustment? Lifter knock?
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