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suggestions
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Posted by: 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-

Posted by: 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.