Concours- Thanks for the replies, yes, the carbs are clean and the idle circuit is functional. Also, I did not know what to look for to see if I had the balancer adjuster fitted to my bike. Looks like it do ;-)
Thanks to SOS for asking that question as I did not know....
I have uploaded a picture of the adjuster and a picture of the bike.
Here is one of the 1974 TX750 - http://img840.imageshack.us/img840/1...cture001vq.jpg
and another of the adjuster for SOS - http://img200.imageshack.us/img200/2...cture004hy.jpg