Yuku free message boards

Don, a good and very valid question, if you have the tank too high yes, the bike will be top heavy. I can't answer for Davo's setup accuratly, but the weight is less then that of a pillion passenger, 1/2 the weight really, mine will come in under 30Kg.
My tank does look big and high, it is a big tank really at 25Lt, but there is approx. 16Lt of that fuel sitting where the pillion seat was.
see accompanying photo of the inside of my tank without baffles:


As you can see where the tank steps down is where most of the fuel is, and that was where the pillion seat was. the height of the floor there is about 1.5" above the height where the fuel line taps into the stock tank in the riding position, ie, heading down the road.
So, to answer your question simply is that yeah you will notice the weight there when the tank is full, and as it drains into the main tank it will disappear. I built and tested a steel mockup of the tank at approx. 20Lt, strapped a cement bag onto it and rode it for 3 wks up to some very high speeds and it really was just like having a pillion passenger on the back.
Hope this helps
Cheers
Thommo

ready for darwin