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dr650 Idle Speed

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Shop manual for a 2004 dr650 says 1600 to 1700 RPM for Idle speed. With a two brothers aftermarket pipe, air box mod and jetting that seems really high. When i checked it with the aftermarket vapor tach i have connected it seemed to run really smooth around 1100 or 1200. Any comments??

Also whats the correct way to adjust idle speed?? from the extended fuel screw or the adjuster that's on the carb??? I ended up leaving the carb throttle adjustment the way it is, warming up the bike really good and adjusting the fuel screw until it almost cut the engine out and then turned it back out till it was just running smooth. Ended up about 2 or 2.5 turns out.

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