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Sisu guy · 06-12-2012, 05:50 PM

The "drone" is actually a resonance in the exhaust system. Depending on the model it seems to occur between 2500-3000 rpm. My 2000S is very bad in the 2600-2800 rpm range and it is totally gone by 3000rpm. Hope this helps....

06-12-2012, 05:50 PM	#11
Sisu guy Registered User Join Date: Sep 2011 Location: Michigan Posts: 61	The "drone" is actually a resonance in the exhaust system. Depending on the model it seems to occur between 2500-3000 rpm. My 2000S is very bad in the 2600-2800 rpm range and it is totally gone by 3000rpm. Hope this helps....