Hi,

Will be going to the St. Anthony Dunes in Idaho in June. I was wondering if I could get some help with rejetting the carb.
What I have is a

2005 Yamaha Yfz 450 Atv (All stock- No Mods Yet)
The Stock Main Jet is a 158
The Stock Pilot Jet is a 42
Not sure on the needle clip position

I live in Minnesota with a elevation of 1100', was told the elevation is 5500'.
I believe that I need to lean it out a bit for the higher elevation. What do most people run for a stock machine like this?
Thanks
Tim

 

i cant answer you question...but just remember the yfz's are jetted very lean from the factory....