Bull,, I tried a Zinger 20x8 on my MVVS 35cc gasser and I was not impressed,, so I tried a 3W 20x8 and I was very happy with it, the 3W loaded my motor more, (Zinger 20x8 7690) (3W 20x8 7370) "that was peaked RPMs,,

you said you were not happy with the 20x8,, well from all the RPM numbers I have read the Brison 2.4 is not a high RPM motor, it is a torquer !!, it does not turn a Zinger 20x8 any more than my MVVS 35 will, "somewhere around 7700",, for wood~ what makes the Brison 2.4 pull is a 20x10 at around 7000,,

try a 3w 20x10, or a 3W 22x8 I think you will be happy..

Jim