08 yz 450 stock jetting

[Big Black]

anyone know what the stock jetting is for 2008 yz 450, is every 08 yz 450 jetted the same from the factory? A local dealership made it sound like not all are jetted the same from the factory??

Thanks

[grayracer513]

The stock jetting is listed in your manual in section 2. They are all the same unless the dealer swapped jets before selling it, which is, um, unlikely.

[wolfie12]

anyone know what the stock jetting is for 2008 yz 450, is every 08 yz 450 jetted the same from the factory? A local dealership made it sound like not all are jetted the same from the factory??

Thanks

Off the top of my head, the US spec bikes came with a 42 pilot and 160 main. Im not sure about the needles or leak jet. I just changed my main to a 165.

[Big Black]

Thanks for the info.

Brian

[dirtbikeaddikt]

My 08 yz450 came with a 45 pilot and a 160 main. I swapped the 160 for a 155 and its runnin pretty good.

[Big Black]

My 08 came with 45 pilot and 160 main also, a local dealer here suggested i try a 48 pilot for the poppping etc.. Has anyone done that or what do you think, i'm gonna give it a shot

[MX926]

My 08 came with

160 main

45 pilot

55 leak jet

ncyr needle 3rd position

I am currently running

168 main

45 pilot

55 leak jet

nflr neddle 3rd position

I live in south eastern minnesota, and I am running Power110 fuel mixed with pump gas. I run 1gal power110 with 4 gal pump gas. And the bike rips.

[todds924]

Off the top of my head, the US spec bikes came with a 42 pilot and 160 main. Im not sure about the needles or leak jet. I just changed my main to a 165.

That is the wrong info. US spec bikes come with this: 160 main/45 pilot/NFLR needle,3rd posistion/55 leak jet.

[mxracer206]

My 08 came with 45 pilot and 160 main also, a local dealer here suggested i try a 48 pilot for the poppping etc.. Has anyone done that or what do you think, i'm gonna give it a shot

I have had a 48 pilot in mine all season and it run's fine and start's easier. It was in the 70's this weekend and it was still ok but if it gets much warmer I will probably go back to a 45. I don't think I get it on the main jet much but on my son's it seems better with a 165 year around.

[todds924]

I have had a 48 pilot in mine all season and it run's fine and start's easier. It was in the 70's this weekend and it was still ok but if it gets much warmer I will probably go back to a 45. I don't think I get it on the main jet much but on my son's it seems better with a 165 year around.

I think you may have problems with the 48 when it gets warmer. When i tried that my bike was very hard to start if i stalled it. I go down to a 42 pilot in the summer.