Quote Originally Posted by geezer101 View Post
You 'can' tap and plug it but it's more of a safeguard to prevent coolant from backlogging under the carb base. The vast majority of the time nobody seals the coolant port up. Try adjusting the mixture screw first, then adjusting the idle speed screw.
Thanks, Geezer.

I got a 701-DGV4 jet kit from Carbs Unlimited and have been working through it. I blocked off the PCV and I think that's causing me Lean Best Idle tuning issues.

It was running great at 4-4.5 turns OUT from seated on the mixture screw. If I understand the LBI tuning directions, that would have me put larger jets in. When I was working on the jetting, I plugged the PCV, I think I messed myself up.

1. Am I understanding the LBI tuning right, where too many turns out means my idle jets are to small?

2. The carb came with 55 primary/50 secondary. Do I need to up both idle jet sizes?