Question about 1977 Suzuki GS 750

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1983 suzuki gs 750 New airpods and jets. Bike not running right

I have a 1983 suzuki gs 750. I replaced my airbox with single airpods and also put in larger jets. The bike still isnt running correctly. I checked the plugs and theyre clean so I think that there isnt a proper air to fuel mix. Also, the bike jerks when I get up to a certain point of throttling and it chugs then bursts up to speed. My jet sizes are Main 122.5 and Pilot 42.5. This is larger than the original jets. Do I need to go larger and if so does anyone know exactly how much bigger so that I dont keep wasting money on jets that dont work because you cant return them.

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  • Anonymous Mar 14, 2014

    main jet for suzuki gs 550 1979 pods



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You are dealing with Suzuki vacuum carbs, you cannot just replace the air box and re-jet. What you are running into is there is no pressure to raise the diaphragm because there is no restriction to create such vacuum. Either put the stock box back on or go to the biggest main jets you can buy. Sometime even when you get stage 3 jets you still have issues. Vacuum carbs are not made to run with no restrictions.....putting aftermarket exhaust on it will make things much worse.

Posted on Sep 30, 2009

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You have an improper fuel/air mixture. what were the stock jets & pilots? Go up about 4 sizes on the pilots and 2 sizes on the mains

Posted on Aug 04, 2009

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If you increase fuel you also need to increase air flow and possibly exhaust flow

Posted on Jul 25, 2009

  • john_and_pen Jul 25, 2009

    if you increase fuel you also need to increase air flow and possibly exhaust flow

  • Gogoplata Jan 18, 2012

    I have a gs 750 and swapped out to pod filters... I forget the exact size but they were as large as I could go... It runs great really woke the bike up it's a dam beast... I'm sitting on my girls couch so I can't just go look into my files for the exact number.. But I remember it being the largest available.. Another thing to watch out for Is tiny pin holes in your diaphragm of the happens over the years and is a pricey fix.. But it can also cause sum funny hard to diagnose carb problems... But now sweat get bigger jets ... However I do have a yoshi pipe on it as well of luck!!


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I took off air box added airpods with stock exhaust on a 1981 suzuki gs 650 what size main jets should i replace with

Richard, I would suggest you go with a stage 3 jet kit for improved air flow. Ebay has them for a great deal. I'll post a link. Good luck. ^^
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I have a 1978 gs 750. I have had the bike for three weeks now. Put new coils , cleaned the carbs (new gaskets) I have taken apart the carbs 5 times now. Had it running for a bit but would bog out pretty...

Could be a number of reasons
1-your main jets are too big
2-float level to high
3-blocked exhaust
4-points or CDI(please confirm)
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Please get back especially No4*

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I have Suzuki gs 750 e, model 1979. The engine is an air-cooled, 4-cylinder,4-cycle model equipped withdual overhead camshafts. I am looking for new camshafts for the engine. Do gs 1000 and 1100...

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Proberbly the easiest way to more power is to fit the barrells and top end from the GS850. This will fit straight on. Ideally, you will need the 850's carb, but the 750s could be jetted to suit. The exhaust is the same fittings, so you could retain the gs750 exhaust as well. They also share the same airbox.

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Nov 12, 2009 | 1977 Suzuki GS 750

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Fuel diagram ...where hoses go ...for a 1978 gs

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2 Answers

Suzuki gs 750 getting a constant flow of fuel out of crank vent

The breather tube may warrant re-jetting but not re-syncing.

A “very helpful” rating for this answer? Thanks!

Jun 11, 2009 | 1977 Suzuki GS 750

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