Need CO reading as have a exhaust gas analyser, want to to get carb setting as close as possible to std setting before using the colortune, its at 3.5% at the moment

If U use gas analyzer, then REMEMBER close another muffler pipe with some stuff, like just right size wood, that it DONT TAKE air backwards from that pipe !!!! NEED to do so, if U want put analyzer to exhaust output. I have seen, what happens, if that is not done: There is some "pumping effect", what cause wrong display to analyzer. Such have happened to me.... If U tune same time, then U have to wait some mins, that analyzer start to function. That have some delay and remember adjust little by little. Anyway i dont trust so much to such analyzers. That function much better, if U put Your bike to Dyno and then adjust it little by little, then You can maybe find best adjustments, but surely much harder job with Weber, than with adjustable injection, like P7 with some adjustable FIM eprom, what U can remap in dyno with FIM software/pc...

thank you finnpaso, will take advice regarding blocking the other muffler when gas probe is being used

Simply some wood, etc. to end of another muffler and lambda probe to another muffler end. But remeber, that analyzer measurement is conclusion of BOTH sylinders. Better, if U can weld connectors for lamda sonds to BOTH headers, about 15-20 cm from cylinder heads, where is RIGHT temperature for "normal" lambda sond. I have welded connectors for both 750 and 907 and they NEED to be there, if You put your bike to very good dyno. U dont know difference between sylinders adjustments, if u have only one lambda.... SIMPLE, as U see!

You're doing a very good job! :thumbup:
Althought, I had no good result until I built my own vacuum balancer and had a complete tuning of the balancer
All my experience, is posted in 750 f.a.q digest, available for any skilled mechanic
have a nice work, and...