http://www.jba-engine.com/showProduct.asp?id=223

size disp(cc) bore(mm) stroke(mm) output(Hp/r.p.m) crankshaft weight(oz) prop size practicall range
56F 9.15 23.4 21.2 1.50/17500 1/4*28 16.5 11*7 2600/14800

The weight is lighter than the evo .46 but puts out a bit more power. Hope it's going to be a good one.

Cobus