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GS400L / GS450L 1980 carb parts
I think many of you are far more familiar with these bikes/carbs than I am. If you have the time I would like to tell you what I have done with them. The bike is in Canada and Suzuki Canada did not bring in the 450 bikes for a few years after they did so in the USA. I am assuming there is little difference from the 400 to the 450.
When I took these GS400 carbs apart the main jet needle was corroded badly and could not be reused. I could not find replacement needles anywhere. I have 4 pairs of Yamaha XS400 carbs and I replaced the needles with the Yamaha needles. However... the Emulsion tubes of the 1981 Suzuki GS400L are much smaller in diameter and would not allow the Yamaha needles to bottom. So I replaced the emulsion tubes with Yamaha so they would fit. I used the same original Suzuki main jet and the same original pilot jets and the same original air metering jets. The bikes does run now, and reasonably well... at least on initial fire up. I will hopefully take it out tomorrow to see if it runs well through all throttle positions. It seems there are no new main jet needles available for this carb. I think the Suzuki idle pilot jets should not have that much effect on the bike...
So I was wondering if this sort of swap in/out of other bikes and other Mikuni carbs is common? and if I actually need or want to get the proper Mikuni Suzuki main jet needles, where are you guys getting them? I kinda think I am ok swapping jets and needles and emulsion tubes as the Yamaha XS400 and the Suzuki GS400 cannot be far apart in the requirements of metering/feeding of gas....
Mike..
mikestp@yahoo.com
When I took these GS400 carbs apart the main jet needle was corroded badly and could not be reused. I could not find replacement needles anywhere. I have 4 pairs of Yamaha XS400 carbs and I replaced the needles with the Yamaha needles. However... the Emulsion tubes of the 1981 Suzuki GS400L are much smaller in diameter and would not allow the Yamaha needles to bottom. So I replaced the emulsion tubes with Yamaha so they would fit. I used the same original Suzuki main jet and the same original pilot jets and the same original air metering jets. The bikes does run now, and reasonably well... at least on initial fire up. I will hopefully take it out tomorrow to see if it runs well through all throttle positions. It seems there are no new main jet needles available for this carb. I think the Suzuki idle pilot jets should not have that much effect on the bike...
So I was wondering if this sort of swap in/out of other bikes and other Mikuni carbs is common? and if I actually need or want to get the proper Mikuni Suzuki main jet needles, where are you guys getting them? I kinda think I am ok swapping jets and needles and emulsion tubes as the Yamaha XS400 and the Suzuki GS400 cannot be far apart in the requirements of metering/feeding of gas....
Mike..
mikestp@yahoo.com
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