Well, here is a video of the engine setup on test stand, just after I cut the header down by 1 inch.
I forgot to re-adjust the needles after the header mod, both high speed and low speed needles were a little rich.
I know this is not the best video clip - with too much zooming and not focusing well.. lesson learned

[link=http://www.youtube.com/watch?v=k2jBulFVUmc]http://www.youtube.com/watch?v=k2jBulFVUmc[/link]

Oh and, Ive maidened the Spot On 120 and 160 FXG with 17x10 JXF. But this time I tried a new fuel mix - 8.5% oil.. Ran like a clock - no sagging or overheating.
This is probably the max safe zone for oil content - for this engine.

Now its time to complete the conversion of my other 160 FX to 160 FXG.. which will power a SebArt Katana..

thanks to all for the inputs and observance.!