Hey Monty,
I've got an N21BF Limited (fully broken in), and running an ODO100 plug, O'Donnel 20% fuel and Dynamite 086 pipe set.
Do you know the HSN and LSN settings that would put me in the ballpark for a reasonable tune?
Thanks!
20% will be a little diff. but hold slide barrel out screw in all the way then back out 3.75-4 turns , high speed about the same or just about flush with brass housing .
run engine at about 250 and it will be great .
adjust idle to appropiate idling rpm