Originally Posted by dh79
The question I'm most interested in, which hasn't been answered yet: can there be too much difference between the primary and secondary jet sizes? If not, then I'll just lean out the primaries and richen the secondaries until I get my desired ratios.
Your in the tuning circle, there isn't any exact ratio between primary and secondary jets, you have to tinker your way to a solution the engine likes for the installation of the vehicle its in and your local environment.
Get a bowl fuel drain kit, keep a roll of aluminum foil around to catch dumped fuel and some rags to mop up with, a stack of bowl and metering block gaskets and a bunch jets about 5 ranges up and 5 ranges down from what you've got, . Don't smoke, but gasoline flavored coffee is OK.