I have a 1999 Kawi 900 STX which I purchased used.. I just put in a fresh SBT engine (runs strong) and would like to replace the impeller with something that will give me back some top end speed. I not looking for a rocket miracle....i'm only to maximize what is possible with the current setup (stock).

I am told the 900 STX should do in the neighborhood of 50-55 mph but i'm only getting 40 mph due to a damaged Solas X-prop KF-SC-X (pump bearings broke and impellers outer edge was shaved down)

Can anyone recommend an impeller that has more top end speed???