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Old 01-30-2013, 02:45 PM   #8
ALinUTAH
Studly Adventurer
 
Joined: Apr 2011
Location: Wasatch county
Oddometer: 612
I ride an XT250 in the mountains. I wanted a compromise between desert at 4-6k ft and mtns up to 10k. I jetted the main down two sizes, which is about right for the lower end, and I open up the air box when I'm up in the mountains. You might want to rejet 3 sizes and also open up the air box. I don't know the details on the 225, but on the 250 you can flip the filter cover over and it leaves a sizable gap to let more air in. You might have to cut some holes. Leave the pilot alone, but you might want to lean out the pilot screw a little, and might have to bump the idle speed up as well. The XT will do just fine after being properly jetted. Just don't ride it like that down in the flatlands. Al
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