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ASK THE MXPERTS: 2004 Yamaha YZ250 Jetting Info
ASK THE MXPERTS: 2004 YAMAHA YZ250 JETTING INFO

Dear MXA,
   I recently bought a 2004 Yamaha YZ250. What are the best jetting specs?

   Swap the stock N3EJ needle for an N3EW needle. This is what the late-model YZ250’s use. Obviously, all jetting is variable with altitude, humidity and temperature. Go richer when it is cold and leaner when it is hot.



MARCH 2012, VOLUME 40, NUMBER 3
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WARNING: Much of the action de­pict­­ed in this magazine is potentially dan­gerous. Virtually all of the riders seen in our photos are experienced ex­­perts or professionals. Do not at­tempt to duplicate any stunts that are be­­yond your own capabilities. Always wear the appropriate safety gear.