What main jet should i be using?

[Blaster350]

Ok so i have a fmf fatty/ powercore two combo. A uni pod airfilter with foam vents and the snorkel removed.
Stock oil injecion still. Its running a 230 right now (I know i know) Owner before me didnt even jet it.
About what size main should i use? Eleavation is 3500.

 

[Blaster200boy]

Ok so i have a fmf fatty/ powercore two combo. A uni pod airfilter with foam vents and the snorkel removed.
Stock oil injecion still. Its running a 230 right now (I know i know) Owner before me didnt even jet it.
About what size main should i use? Eleavation is 3500.

Where I'm at it is at 900ft and my friend ran a 280 main...i'd start at a 300 main....then plug chop

 

[98gtp98]

I:I yepppp yepppp^^^^^^^^^ all was go big then lean out

 

[xjma]

I would just remove the airbox cover all together, and yeah, start big and go down.

With airbox off, FMF setup, good filter, and the oil injection still there I was running a 260 to 290 depending on temp and it was running good. I'd occasionally mess with the needle too just a tad. Keep in mind that this is at ~400' elevation though, so you won't have the same jets.