no power after starting

[zac7r]

Bought a 49cc Eton Alta 49. Put a new battery in and modified a few things. Nothing that should affect the way it rides. The other day it started bogging after you started it for the first 10 min then I would run fine. If you shut if off let it sit and go again it does the same thing. Let it run and it runs. Also has an after market air filter on it and now sure if the guy I bought it from re jetted it.

As of today I have bought a new carb changed it and bought a new air filter And its still doing it.

Can anyone helo

[90GTVert]

Even though it was rejetted, it could be a tuning issue. IMO there is no one-size-fits all with tuning. Maybe the jet in there isn't quite right. What kind of air filter did you replace it with? New carb may not have the right jet for it.

Another possibility is the CVT gets hot and the springs fade and RPM gets lower so it falls out of power.