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2003 drz400s jetting w/rs-2 system

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looking for feedback on this setup.

2003 drz400s w/yoshi rs-2 full system

3x3 mod w/uni filter

stock motor

dj kit spring and needle set on 4th position

150 main jet

22.5 pilot with keintech ext.fuel screw 2.5-2.75 turns out

install 14 tooth cs sprocket

riding @100-3500/4000 ft.

50's-90's temp,dry to moderate humidity

40%street,60% trails/f.s.roads

If I kept the stock exhaust,would that change the jetting recommendations?

4 db diff between stock and rs-2?Thanks.­čĹŹ

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