Hi Mike,
i don't have any experience with different carburettors.
I know that something from the SR500 engine ist similar to the TR1.
For the SR500 tuning the Mikuni TM36 is a standard option.
You can find carburettors and nozzle sets at
www.kedo.de.
The only way for a good adjustment is some measures on (in?) a test sation.
By the way, your blog is really exciting, i enjoy it.
Best regards
Thomas