Weird? Scooter bogs at mid even with multiple main jet changes

[Rhompin45]

I just looked at your filter. So it is a open filter is it straight off your carb or is there a hose in between to kick it off to the side?

[digginLA]

Originally Posted by Rhompin45

I just looked at your filter. So it is a open filter is it straight off your carb or is there a hose in between to kick it off to the side?

Hey Rhompin45, I'm right in the heart of Los Angeles and I think the elevation is 290 feet. So does that mean I need a smaller jet? I tried a 107 and got the same results. I have a 103 which is what was on the original carb.

My air filter is off to the side. I got a tube at Lowes because when coming off the carb there is a bracket that was in the way and I had to extend it past it and to the side was the best option.

Is off the side bad?

[gitsum]

The higher the elevation the less fuel the engine needs because the air is less dense.

If you significantly open up the airbox and exhaust, you will have to retune the carb.

This means adjusting the air/fuel screw, raising the needle jet a notch or two (or using shims), and going to a larger main jet. There are plenty of tutorials online that will guide you through the process.

Be prepared for a lot of trial and error, it is the only way to make sure the carb it tuned optimally.

Since you got the old carb apart, it might be easier to clean it up and try using that first.