Where should I start with jets?

[Pellethuntr]

I bought my Warrior with a DG slip on, modded air box and aftermarket filter. I have been monitoring my spark plug for signs of lean condition and it appears that it is indeed a little lean. I opened up the carb today and found it had stock jets still installed.

What jets should I buy? My elevation is 900-1,000ft. Because of my open air box should I skip the 147.5 and jump to the 150/+?

Looking for some input from guys who have more experience than I.

 

[Yamafreak]

Just buy both and and find which works best. Buy spark plugs and plug chop

 

[Pellethuntr]

Just buy both and and find which works best. Buy spark plugs and plug chop

I am not asking how many I should buy. I am asking if I should skip the 147.5 and go right to the 150+ size jets.

Not sure if the 147.5 will be enough of an increase to even bother?