BQ50QT11 low revs & power

[dave7923]

I recently had starting problems with my BQT11 and got that fixed by replacing the side stand switch.
Now I have a problem getting the scoot moving! If I use full throttle for more than a few minutes, the power drops really badly and I can't get the scoot to rev up. If I leave it for a few minutes it returns to normal. If I run the scoot at 3/4 throttle then it seems to be OK...ish.
I'm suspecting the auto choke or something like that so can anyone help with suggestion what to check and how?
Thanks
[e-mail]

[hypojam]

Carb issues

Strip and clean the carb(including the jets), that should fix it, and then adjust the fuel mixture screw to 2 and half turns out from in.

[hypojam]

Might also be worth to check your valve clearances

Hope this helps

[Macrofeet]

It will be

blocked main jet
Jet to small
broken fuel valve

had same problem replaced fuel valve and carb

if you can unscrew the underside of your carb should be an easy fix if you follow guide