high alt jetting for 520 mxc>

I ride at 4,000 to 5,000 feet, 520 MXC with an ECM needle in the middle and 162 main. Works very well.I also added air holes in the sidecover to let it breathe better. 10 1 inch filtered holes made a noticeable difference.

01 520 mxc

98 200 mxc ( going away!)

Are there any guys out there ridin in high alt '7000 plus on a 01 520 mxc.what are you using for the main jet.I put a 162 in but have not going ridin yet.

THANKS SCOOT,WHAT IS AN ECM NEEDLE .WHAT DO I ASK FOR AT MY PARTS STORE.(NUMBER ON THIS NEEDLE?

From Sudco@ 1-800-998-3529. The needle is a OCEMN. Same taper as Yamaha needles. Gives more bottom/mid.

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