So when I purchased my bike it already had a yosh slip on. And was never Rejeted. I'm going to be purchasing a k@n lunchbox to instal and she's definitely going to need to rejeted after that. I just don't know where to start. I read the forum post of every ones jet sizing and stuff bit I'm still unsure of what sizes to purchase. And should I just swap the two mains? Or all of them ? From what I read I'm think 40, 150 but I want to be sure before actually going out and buying. I'm located in Portland oregon. Idk how much elevation affects jet size. I'm not sure where we sit according tosea level?

What size jets you see in my signature are what I have in my bike with my Yoshi and lunchbox.

What year is your bike?

It's in his sig. '95

40 pilots, yes.  Then pick a main. Any main. Install, run and check plugs. Change mains and washers as needed.

I totally missed that. The good thing though is dont those older carbs only have 2 jets in each bowl?

I'm pretty sure its two just per bowl main/idle correct? Idk I'm still learning haha. I've heard a few guys say theyre running that 147.5 main. I might just end up buying a set of those and a set of 150's. And comparing them. Good news is, is that I'm selling my integra shell tomorrow and will be able to some shopping this weekend and start getting at it

And probably a set of 145 just to be safe. I don't want to be stuck shooting unburnt gas out my pipe hahaha