I think just the opposite...
i guess ill give some new ones a try. Im almost ready to just buy a new motor! Cant figure this friggin thing out!
I think they would make it lean... the pulse line would not be working very well.....thus not pumping the supply of fuel the motor needs.
my stance on the issue is that the reeds can not atomize the fuel so it is just poured into the engine which makes it look like it is running rich but the pulse line is making it put less fuel in it then it would normally have.
hence one of the reasons there is no bottom end.. the pulse signal is so weak it doesn't start pulsing slightly until the higher RPMs
atomization happens in the carbs not the reeds. Pulse signal is created for pressure differences in the engine case. Reeds do not effect this.
.. same reason you ruff up the intake....
tried many different jets already even a different set of carbs w fatter jets. changed my cdi, and put my motor in my brothers ski to eliminate fuel lines that are bad. It ran just as lean in his ski. The motor has new seals in it and the case has been pressure tested/ no leaks. And the motor is pissing out water good! Getting ready to tear it apart and build it up with more H.P.