Jetting anyone?

[Justin330ex]

i got a t-4 for my 300ex and i would like to know what main jet size i should use? Does anyone know could anyone help me
im thinkin 5 sizes up

[43atv]

i doubt you need to go up 5 sizes. just try one or two sizes and then check your plug if its white you need to go up.if its black you need to go down. if its lite brown your good.

[jb400exxx]

go up 2 or 3 sizes, try 3 sizes first to be save. always start rich, then fine tune it from there.