pulled lid

[tnc110]

pulled lid on air box and it wont rev now...it idles, but wont rev. like the rev limiter is kick in...whats up here?

[Duf6]

you need a bigger main jet in the carb

[tnc110]

are you telling me that taking the lid off lets that much more air into the motor???? I find that hard to believe!!! not doubting you, but that is a big difference!!! Thats a pretty poor airbox design if it chokes the motor that much!

[Duf6]

yeah their all that restrictive it to make sure water dose not get into the intake unless you completly submerge it

[cataway]

to get it to run with the lid off your going to have to rejet ,i sujest you get a 142.5 main jet if your using the stock muffler .
and wile your at the steallership get a #25 pilot jet to ,its to save your self a trip. the more mods you do the more jetting your going to have to do

[tnc110]

ok guys...jets on the way...just never thought a gutting job would result in such drastic results...i could see a piston getting burnt out from being too lean , but for it to be so lean that it cuts out after removing the air box lid that is crazy...I guess after it is properly jetted you really see a difference over stock!!!

[cataway]

yep and for a few more HP units try replacing the stock air boot with one from a trx400ex , got me almost 3 hp

[tnc110]

wow!!! 3hp! i lined up my stock 05 with a stock 08 ex and beat it by a good bit...hate to see what 3 or 4 hp wld do...

[cataway]

hp is addicting and i can see you have got the bug.

before i did any, what i call major mods, i had gotten 40 hp from my z ,(mostly because i do my own work )after that it really starts to get expensive to get more HP

i hope to be up over 50 by this spring