Pw 50

[Rus01]

My son has an older pw 50 1981 yamaha. It runs prety good but it dosn't rev like it should. I think its over fueling and i've had carb apart 100 times. Just wondering if somebody could help get this thing reving up properly

 

[Yz-85]

air fule mixture

 

[adallm]

check the exhaust i had the same problem i took the head apart and found the exhaust port was almost closed off

 

[Rus01]

wich one is the air fuel mixture, i'v been playing with just about all the screws and it didn't seem to make a diffrence.
And if take the head off is the head gasket going to be screwed or is it reusable?

 

[mikieobryant]

make sure the gasket from the carb to the head isnt sucking air.