A friends 450... Need help with jetting

[Livingmylife93]

He doesnt understand the whole idea of jetting.

He now has a full Yoshimura exhaust and some type of aftermarket foam filter. Its a 2007.

Tell me everything that he needs to buy.

And then all the settings i will need to do when i do it for him. Like how many turns on the mixture screw and the clip postition and stuff.

He says it just has no power now that he put the filter on.

Thanks guys, its much appreciated.
I need to get him riding again

[kyledvor61]

go to yfzcentral they will be able to tell you alot better there

[Livingmylife93]

You should post this up for me over there  :grin_nod:

I went over there but couldn't find anything, and dont want to sign up  :'(

[Livingmylife93]

 

Just need numbers 

[SanDbUm]

Is the lid also off the bike or just a high flow filter?

What does he have for jets currently??

[Livingmylife93]

The lid is on.

And he has NEVER jetted the bike, so its still the stock jets.

[SanDbUm]

The lid is on.

And he has NEVER jetted the bike, so its still the stock jets.

I would say...

170-175 main...
45 pilot...
2 - 2 1/2 on air screw....

Should be pretty Close there...

[Livingmylife93]

Thanks

[SanDbUm]

yessir...

[Livingmylife93]

anybody have a link to a detailed walk through on yfz jetting?

or if anybody is good enough and can tell me off the top of there head...



im afraid of carburators 

[kyledvor61]

anybody have a link to a detailed walk through on yfz jetting?

or if anybody is good enough and can tell me off the top of there head...



im afraid of carburators 

http://yfz450.theatvchannel.com/atv-tech-articles/6-tech-reviews/48-changing-the-pilot-or-main-jet

[Livingmylife93]

Thanks kyle.

Do i need to move a clip or anything?

[kyledvor61]

hell i dont know i just posted a link


now sign up for vip so you can give me your karmas

[Ridenfast03]

go to yamaha get the dirt bike needle. 170-170 main and 45 pilot.i put a 35 leak jet in mine.9 dollars at yamaha.like the other guys are saying hit up yfztech or yfz central their are tons of jetting threads.it is pretty easy take the carb off and take the bottom off and thier are ur jets.main is the hex looking jet. and the pilot u are gona have to have a small screw driver to remove.also ur gona have to turn the air screw out a bit or that thing is gona pop and sputter and back fire all the time.it takes some time yfz's are real touchy but when u get it right they run their balls off...