T Mack 1 - FSO
Serious Thumper Alliance Member
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sold 2001 LS650 for a 1986 XLH1100
Posts: 2919
Emmaus,Pa
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In theory, when adjusting the idle mixture screw, you should be able to get the idle to drop on both the rich side and the lean side. If you can't, then the jet may need to be replaced.
If you can't get it to drop on the rich side, you need a bigger jet. If you can't get it to drop on the lean side, smaller jet. BUT>>>>>>> the sprkplug color should be checked after running on the adjusted setting.
On mine, the 55 was too big. I could bottom out the screw and the idle didn't drop. With the stock jet (52.5), I'm real close to 3 turns out. ( I could use a 53 or 54 jet)
My bike: stock air box & filter, White spacer mod, Dyns Screaming Eagle turn-out (clone, w/ baffle added), elevation approx 500 ft above sea level. 152.5 main.
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