ok then, so I am one f them fools with a gk71 with the dual twin carb things

I have the bottom to mid sorted and running sweet, but lean at the top end, trying to get bigger mains, but no joy, the threaded portion of the jet is around 8mm, far larger than any jets that my local bike shop have in stock.

any suggestions where I might be able to get some?

failing that its out with the drills and start the long process of strip drill rebuild test

You could try NRP or Allens.
http://www.allensperformance.co.uk/mikjets.html" onclick="window.open(this.href);return false;

thanks I will drop them an email, but none on any sites are large enough

the threaded portion is 8mm dia, biggest I can find are 6mm thread with 8mm head

this damned bike has fought me all the way