I cannot change the jet needle according to the guy at Sudco as they cannot tell what is lean and what is rich. The needle is obviously my problem as I do not live on my bike at WFO.......but that would be fun.
You may not be able to tell rich or lean but the larger the diameter the smaller the annular ring will be between the needle and the needle jet.
Look up your needle jet and get a fatter one. That will make it run leaner.
I'd still suggest what I'm running in my VM38s because I'd think that the smaller flatslides aren't far off in airflow to the larger VMs.
I'm jealous about Barber, I've never been there.......