Thanks Box-a , i ended up e-mailing Siebenrock and they got back to me with the 5.6kg.
I have picked up a stainless 100mm round can 420mm long that i will use for now then go with a set of stainless headers and 'Y' pipe from moto-bins i think. For now i have been doing all the oils, cleaning, ordering service parts, had to clean and seal the tank. Got a new solo sear and PD rear rack now am building panniers and pannier frames. next thing to make is the new better side stand and i may machine up a alloy shift leaver. I have new led tail light and blinkers coming that i will try and fit into some hand guards. I will price up some alloy stock and may machine up a sump extenion to get a bit more oil in there with out the oil cooler.
No big hurry.