Hi Cameron,

That weight is with the ignition module included.

About the soft mount, I would keep the same principle of the Hyde mounts, without the nose ring.
Just make the rear rubbered plate wider, with an incorporated carbon fiber flange suited for such engine.
With my soft mount design it's easy to make the carburettor fit through it.

About the pefa muffler, this is their web site:
http://www.pefa-modelltechnik.de/
but it is not updated since 2001...