How does elevation effect jetting

[fruehjames]

I bought a used 2000 blaster in the phoenix arizona area which is around sea level and brought it back to where I live in southern Arizona. The elevation here is around 3500 to 4000 ft. What effect would this have on jetting? The current jetting in the bike is 240 and it has an fmf full exhaust, stock otherwise. Anyways the bike will sometimes bog out at high rmps or at wide open throttle, do I need to adjust the jetting to compensate for the higher elevation and might this solve my problem? Any suggestions on what size jetting to start with and adjust from there? Thanks for the help

 

[stephen12091985]

cuz there less oxygen the higher the elavation

 

[fruehjames]

yeah i know there is less oxygen with higher elevation, what should I do to compensate for the lowere levels of oxygen , lower the jetting?

 

[darealblaster]

Ok, easiest way to explain this. Just like the higher you climb a mountain(for example Mt. everest) you need more oxygen, well same for the quad.

 

[darealblaster]

yeah i know there is less oxygen with higher elevation, what should I do to compensate for the lowere levels of oxygen , lower the jetting?

yes, you need less gas.

 

[fruehjames]

I realize that the higher elevation affects oxygen levels, my question is what do I need to do to the blaster to compensate for the lower oxygen levels

 

[yb200]

try a 230 main......if it still does it do a 220 main