1981 Suzuki GS 650 GL jet size?

[bthomas]

I just bought a 1981 Suzuki GS 650 GL. It ran fine when I bought it but has slowly declined to the stage it's in now. I've been messing with it for a couple weeks and have changed the spark plugs, new air filters, new battery, oil change and cleaned the carbs it's at the point now were i can get it to start but after a couple seconds it dies abruptly. I've been trying to figure out the original jet size, but have had no luck right now I have 132.5 on the main jet. If anyone knows the original jet size or has any ideas what could be wrong it would be greatly appreciated.

[Steve]

You said "new air filters". That sounds rather plural, hinting that you might have pod filters intsalled?

How about the exhaust? Is it stock or is it a header?

Both of those will affect your jetting requirements.

The STOCK main jet size is 110, assuming you have a US model. Installing pods can raise the requirement to 120-122.5, installing a header can easily take it up to the 132.5 that you have installed, but only plug chops or a dyno run with an air/fuel meter will tell for sure.

.

[BassCliff]

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Hi Mr. bthomas,

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