The carburetor might be out of sync assuming that your carbs are clean and your valves are in spec. Also, you might want to check for vacuum leaks by spraying water after the engine is warmed up. Could be the hoses or around the air box. Hopefully you find out what it is and let us know.
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94 900RR
04 BMW Z4 2.5 M Package
01 R170 AMG Sport Package
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