ASK THE MXPERTS: Can You Tell Me The Best Jetting For My 2003 SUZUKI RM250?

June 2, 2009
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Dear MXA,
   I bought a used 2003 Suzuki RM250 and the jetting is awful. Can you help me?

   Suzuki’s box stock jetting in 2003 left a lot to be desired. Here is what we ran on our sea-level RM250 race bikes back in 2003. We went down to a 165 main from the stock 175, leaned out the 48 pilot to a 45 and replaced the stock 6.5 slide with a leaner 7.0 slide.

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