I've seen a few reed valves here and there including the forums, and the 2 weedies I currently have stripped in my shed.

The engine I'm working with is from a Lawn Boy brand weedie and has an odd reed setup (see pic).
The reed is mounted on an arc and is rather short. The lash stop is also oddly shaped.
I'm getting almost 7500 RPM, with the carb tweaked, on an 18x6 prop, single ring, and a stock flywheel.

Has anyone else seen a reed like this? How do they compare (performance) to the normal flat set up?

Also, my Ryan Brand back plate is slightly smaller in diameter. The screws holes line up and I'm sure the gasket will seal if I use it in the Lawn Boy Block, but the opposite would not work because the Lawn Boy piece is too large.

Unfortunately, I didn't get the pics very clear but I think you'll all see what I mean.