f i get the YFZ the only part im prolly gonna get for it is nerf bars for a while, meaning couple months or more...just stock....will that be ok??? sounds too me people say that I should get a pipe and all this other crap...will i be able to ride it stock for a while?? and it will still kick butt?

those bikes run great right out of the box.

yeeeeep!!!

Dude you will be fine, I kind of want nerf bars since this guy i know just broke his ankle, but im im waiting for a skid for my bike

Ok, i was hearing about the free mods??

ahhhhhh....do i nec to do anything else to go along with that...like jet it differently?

shovelboy..

you can rip just fine with a very small investment. here's the basic recipie:

1. remove baffle/sparky from pipe (note the rangers may not look to favorably on this), cost is $0
2. remove air box lid, cost is $0
3. install yz450f bike needle on 3rd or 4th clip (aka NCVQ needle) cost is about $13 at the yamaha shop (yamaha p/n: 5TA-14916-V1-00 NEEDLE (#NCVQ)
4. install 45 pilot jet (stock is 42), cost is about $6 (yamaha p/n: 4MX-14948-05-00 JET, SLOW (#45)
5. install 165 main jet or so, cost is about $6 (yamaha p/n: 4MX-14943-40-00 JET, MAIN (#165)
6. set idle mixture screw to 2-2 1/2 turns out, cost is $0

ride and enjoy. you won't be the fastest, but you should notice a definite change in power. There might be some adjusment on main jet size, clip location, and idle mixture screw, but you should be close.

then when you get some spare change, call rocky mountain atv and get the yoshi slip on delivered for $299 and their TEC insert for about $30 more. This may not be the absolute "best", but it gets you spark arrestor and sound (I've been told this anyway..no tests to prove it) legal..don't want to have to mess with the revenuers when you are out having fun right?

damm good info right there!

Hey rivermobster, do you got pics of your nerfs?

yes..that's the spark arrestor too. That's why I would recommend the yoshi pipe, because you become "legal" again. There are other ways to go for sure, but if you follow this path, you'll have plenty of time to figure out exactly where you want to go, with only a small amount invested.

BTW, although I wish I was smart enough to have figured all of this out on my own, I've gathered this from various sources over the internet, who are obviously much smarter than I.. But I have done this to three different yfz's now, with very positive results..

takes about 10-15 minutes to open a YFZ up....then it rips

Hey SHovel, BeachHead has done this with my YFZ, and I am still running without the Baffle/sparky. It hauls butt (mine) for sure. It had been jetted and the lid, K&N filter outerwear, the Yoshi slip on will be next after this weekend trip so it will be legal again. THanks BeachHead for allthe help.....

thanks all !! ! ! i learned how to jet tonight!!! w00 w00!

***Printing complete***
Sounds like a good start to me......

All the free mods and you'll be very happy. With the cam mod, baffle out and no air lid and rejetting it's a whole nother machine.