Quote:
Originally Posted by motolab
If you don't have a way to measure CO%, lower the idle speed below the factory spec. Starting from a setting that is known to be lean (1-1/2 turns is likely but not guaranteed to be), adjust the fuel screw to obtain the highest idle speed. Adjust to 1/8 - 1/4 turn richer than that. Then, adjust the idle speed back to 1500 rpm.
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This procedure will work for most other bikes but on the DR650 setting the mixture screw this way will often result in a slight "rich bog" just off idle. If you aren't going to make other changes to avoid the rich bog most riders have good results turning the mixture screw about 1/4 turn
leaner than the highest idle.
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