Does anyone know what size the main and pilot jets are stock on a 05 trx450? What sizes do you think I need for 0-minus 15*C? Engine, filter and exhaust is all stock. Thanks.
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Junior Member
Does anyone know what size the main and pilot jets are stock on a 05 trx450? What sizes do you think I need for 0-minus 15*C? Engine, filter and exhaust is all stock. Thanks.
05 trx450r stock
Junior Member
Well, it looks like the main is 118??? and the pilot is 48? I thought the main would be bigger?
05 trx450r stock
Registered User
Stock 04/05 TRX450R.
Main = 118
Pilot = 48
A/F Screw = 2 turns out
For winter, I would richen the main to a 122 or 125, and take the A/F screw out another 1/2 turn IF AND ONLY IF you start popping on decel.
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Junior Member
Thanks ghott. I`ll get 122 and 125 tomorrow and try.
05 trx450r stock
Registered User
yep, thats it. the main jet will be a lot bigger if you take the air box lid off.
2005 450r
*sold* 2001 400ex
"If you think you can, you can. If you think you can't, your right."
"A leader will take you where you want to go. A great leader will not necessarily take you where you want to go but where you ought to be."
"If you want to do something, you will find a way; if you don't, you'll find and excuse!"
"Its not aptitude but attitude that determines your altitude."
Junior Member
How much bigger?Originally posted by cals400ex
yep, thats it. the main jet will be a lot bigger if you take the air box lid off.
05 trx450r stock
Registered User
many of times with a pipe and open air box lid you could be around a 180 or so.
2005 450r
*sold* 2001 400ex
"If you think you can, you can. If you think you can't, your right."
"A leader will take you where you want to go. A great leader will not necessarily take you where you want to go but where you ought to be."
"If you want to do something, you will find a way; if you don't, you'll find and excuse!"
"Its not aptitude but attitude that determines your altitude."
Member
i have an 06 trx 450er , had 118 main original, installed full exaust, k&n, filter sock, cut a 5" x 6" hole in lid and installed a 180 main jet runs great @ 1800 ft or so, before re-jetting ran wayyyy lean!
Registered User
an 06 will be different from an 04/05. a 180 seems pretty big for a 06, but that is just a guess.
2005 450r
*sold* 2001 400ex
"If you think you can, you can. If you think you can't, your right."
"A leader will take you where you want to go. A great leader will not necessarily take you where you want to go but where you ought to be."
"If you want to do something, you will find a way; if you don't, you'll find and excuse!"
"Its not aptitude but attitude that determines your altitude."
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