I like either a Menz-S 22x8 or Mejzlik 22x10 for my Brison 3.2 and CH Double Vision. On the ground the rpm is in the range of 7200-7400 - Mejzlik is on the high side, Menz on the low side. The Menz wood prop is better for 3D and torque rolling. But, the Mejzlik has a little more speed and pull in the verticals. This is on a draggy 19 lb biplane. Since your Yak has one wing and should be considerably lighter, prop selection will not be that critical for blistering performance.
Others have mentioned MSC props, they have a very thick root and don't rev up like other brands of the equivalent size. A 20x10 MSC might be enough load for the Brison, but a Menz or Mejzlik require more diameter and/or pitch.