About how much would a Honda CBR 300 engine weigh?

I'm looking for a suitable engine for an APU (auxiliary power unit) for an EV (electric vehicle) range extender. I've came across some wrecked CBR 300's for cheap and they seem to be just what I'm looking for. I take it the engine and transmission are one unit which is ok. But about how much would one weigh? I'm looking for something that's light, low emissions, and with close to 20hp/15kW continuous power.

Thanks!

Read more: About how much would a Honda CBR 300 engine weigh?