leak jet/needle

why does yamaha send a #90 leak jet with thier ais removal kit. and does anyone know what clip postion you need to use. i lost the paperwork that went with the kit.

WR's and YZ's are jetted for racing by upper B and A class riders. Because most of us are not that fast, the stock jetting does not suit us.

Start with the third clip (from the top/flat)

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