Hi,

I just bought a brand new Novarossi IDM engine for a VERY good price for my son as a practice engine.

I've been trying to find out on which Nova engine this one is based.
I tend to the RX 321, but I am not sure.

I would appreciate as much information about this engine as possible, so I'll know what spare parts will fit.

Also, how does this engine compare to the current breed of .21 onroad engines.

Thanks!