It’s not great. Really.
They all wobble and they all break.
That kind of weight, and kinda unbalanced weight has no business locked onto the hobbit gearbox shaft. Top speed sucks shit, you vibrate all over.
Better to stick with the stock pulley for now.
Have fucked with these things for a long time and decided they just cannot be good runners. Great idea and they work fine on a bearing shaft but lock it to a shaft with a taper and it’s going to suck once you get ripping