Helix jetting @ sea level?? By badharmonics (Read 192 times)

[badharmonics]

hey guys, 2013 jonway yy250t 244cc...
My jetting was too lean, and I'm not wanting to weld an 02 bung or make a sample pipe to hook up my wideband 02 sensor...(I'm a forced induction engine builder/tuner)
What is the preferred jetting at sea level in humid Florida?
This is my current daily driver ,and I've been STRUGGLING!
Thanks so much in advance guys.

[ellpee]

I should think standard jetting out of box should be fine for sea level, if it's for sure running lean maybe just a wee turn on the mixture screw? I had a similar scooter that didn't like high altitude, never could get it leaned out enough for that with just the mixture setting and had to switch jets, but your problem surprises me.