Bogging

[Agile-lety]

I have recently changed my main jet in the carburetor from 80 to 88 and when I am at max speed I feel a bog or sputter when I release then throttle again. Every thing on the bike is stock. Can I get some help.

[blue]

if it ran ok with the old jet put it back in.

[codger78]

I guess that I am as confused as every one else. For example:
Why did you make the change?
What other modifications did you make to the scooter?
How fast is max speed?
So it sputters, then what happens?
You need to explain in more detail all that might help to pinpoint the problem so that the possibilities will become clearer.

[blue]

I cut the cdi box.and replaced all the gas lines with new and stronger ones. the stock gas lines sometimes closeses up and that well make the bike bog down,

[chubbyrockstar]

if you raise your jets you probably need the aftermarket air cleaner because your bike is getting more fuel than air.
try removing the stock air cleaner and putting a sock over the carb and see if this makes a difference before you buy the air cleaner.