suggestions

[ebo 4356]

My yoshimura full system on my 250ex, i need to know what size jets i need, i have uni filter, air box lid off. and If you put a bigger jet on does it use more gas. Is there anyway of noticing if it needs rejetted because i have a 105 main jet right now so what
should i do........






-Trx250EX-

[2muchquad]

go up 2 sizes on your main.yes it may use slightly more fuel but your also makin more power,theres no free lunch:) if it feels flat at high rpm and with your mods,chances are your lean.