Been researching how to jet my carb. Was wondering if I am heading in the right direction.

2000 400EX bone stock.

Elevation 761 ft

Adding a HMF performance slip-on, UNI air filter, and will be leaving the lid on.

I ordered a bunch of Keihin main jets. 160, 165, 170, 175, 180

And two pilot jets 40, 42

From what I have found I think I should start with the 165 main. 2.5 – 3 turns out on the fuel screw. Should I just go with the 42 pilot to start?

Leave the needle in the stock position. I have a few new plugs to do a chop test. HMF says to use a 160 and 42 for a slip on with lid on. Any help or suggestions are appreciated. Thanks