Question about 1977 Suzuki GS 750

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What jet sizes would you recommend for pod filters on the gs750

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Its purely a matter of experimenting with jet sizes! as riding style & atmospheric conditions dictate this.
cheers Rob

Posted on Jan 13, 2010


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Ls650, S40, BS40 Mikuni carburetor, I want to fit a pod filter, but bike runs all funny ,even if i take side cover off the airbox?

If you fit a pod filter, or take the lid off the air box, you are allowing more air into the engine. Therefore, you must also allow more fuel to mix with the air. To do this, you must increase the jet size in the carburator. I recommend Dyno Jet brand jet kits. They will have all the parts necessary as well as tuning guidelines to follow.

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Hi, Jack if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" you're not getting enough fuel.
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2. 1/8 to 1/4 throttle is managed by the air-screw, pilot/slow jet, and throttle slide.
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4. 1/2 to 3/4 throttle is managed by the jet needle, needle jet, main jet, and air jet.
5. 3/4 to wide open throttle is managed by the main jet and air jet.
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For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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1 Answer

I have an 81 gs750 and I have pod filters shortened exhaust,

well you made 2 mistakes here.

1. pod filters
2. shortened exhausts.

These engines are designed and tuned specifically to run the best with the stock air filters as well as the stock mufflers and exhaust. Putting pods on and chopping off your exhaust pipes may look cool but it will cause the bike to run very poorly My advice would be to put it all back to stock and see how she rides and then change things one at a time.

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1 Answer

1983 ltd kawasaki 440 i put pods for air on carbs what sizes jets do i need.

If the "pods" are meant to be direct factory replacements, then no jetting is needed.
Filters like K&N will come with instructions if any jetting is needed for their installation.
You'll need to check with the manufacturer of the "pods" - since you didn't provide the make/model of them here, I can't say for sure if they require a jet adjustment, replacement, or if you don't have to do anything.

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Going to the manufactures specs or anybody's specs for that matter won't help you, you have interrupted the air flow, Get an adj jet from Dyna flow, I did the same thing, went back to the oem specs and still wouldn't run. Got a Dyna flow kit and off it went. Those things are expensive but worth it. Plus they are adj. And you get a free dyno check if you ever find somebody with a dyno tester. My Mikunis were a little newer, but I'm sure they got something. I found mine on Ebay. Hope this helps.

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its likley to be running a bit to week,, try opening up the fule mix screw just a bit to let in more fule

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i put 115 main jets in my 77 ge 750 and it will run but was told to jump up to 140 with pobs and 4into1 pipe (SM6) race pipe at the low side run 130 main and leave the stock pilot in. i rorde mine from NE to SD roude trip about 1300 miles got about 62 MPG with 115 jets jumping up to the 140 will drop the MPG but lets be real im not looking for MPG. hope this will help.

Jan 12, 2010 | 1977 Suzuki GS 750

1 Answer

Changed the pipe to a 4 to 1 and added pod filters now bike runs out of gas at hard acceleration..what jets should i use and will a hi flow gas valve solve this

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1 Answer

Air Filter Pods

Check the K&NFilters Website and you'll probably find the right size for your bike. Be aware, though, that changing air filters can lead to less performance as a result of carburetor jetting problems that can take some time to solve, and get your bike running well gain. Usually the manufacturer's set-up works better than home-fiddled-with ones.

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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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