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2008 YZ250F Stock Jetting - Set for what temp

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I would assume close to sea level and 60-70 degrees as I run pretty close to stock jetting here in Western Wa and am at about sea level. I just drop the stock #70 leak jet to a #40 to give the carb a bit more squirt on the accelerator pump circuit and do the o-ring mod. Bikes run great. 👍

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OT but whats the o-ring mod. Sorry just got the bike and starting to learn all about it!

Look at the "stickys" at the top of this forum. It will give you detailed instructions on how to do it with pics. 👍

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ok call me dumb but I don't see the o-ring mod in the sticky's. All I see is the FAQ's, peep's jetting for certain areas, which bike should I get, a stolen bike and who has the nicest bike sticky?

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