When I open the gas completely, it loses power. As if it were choking. What Can It be?

Are you pulling the choke lever towards you for OFF? Common mistake to think you push it away for OFF!! Ron

email (option): ronpier@talk21.com

No Ron, i did that mistake years ago 🤣 the lever is towards me. I had problems last month and I disassemble the carb and cleaned it. Then she runs well, starts at the first kick but we I ride her and try to go full speed, I get this problem. ?

When you cleaned the carb, did you remove the jet block and poke out the tiny drillings in the jet block and the throat of the carb body. Just blowing it through with an air line is not always sufficient.

I've put some very thin wire in the drilling to show what I mean, Ron

email (option): ronpier@talk21.com

I see you cleaned the carb, but maybe look at the main jet again?

I would check to see that the throttle needle is still attached to the slide and moves up and down. If it has come off it will allow it to run at low speed only.

Thanks guys, will check it again following your tips

Thanks Ron, very helpful as always. That was the problem 😊👋