scooter bugs down after 10 minutes ride.

[amador48]

My scooter runs good for 10/15 minutes them acts like is choking and hesitated, slows down them few seconds later catch up speed again, this happens all the times after awhile will do it again.
I do have some upgrade in my gy6 Chinese scooter.
-85 main jet
-Have a cone air filter not the original box
-High performance exhausts


Just need some ideas with this problem because sometimes there is heavy traffic behind me, thank you everyone for you help.

[amador48]

I was hopping somebody may give me some ideas about my problem, anyway my scooter is 4 Stokes, thanks.

[yosemite]

I think your flooding the poor thing. An 85 main jet is usually run with a BIG BORE KIT.

But to check if it is running RICH OR LEAN try this:

When it JUST starts to act up BACK OFF THE THROTTLe about 1/4 of an inch AND HOLD IT THERE and see what the motor does.
A. If it speeds up it is LEAN
B. If it hesistates sputters or whatever BUT SETTLES DOWN it is RICH.
Sam

[Pony66]

Your fuel petcock could be sticking. Blow and suck on the vacuum line and it will usually free itself.

Also those are the symptoms of needing a valve adjustment.