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end of dual underseat rear exiting exhaust

The drone is from the exhaust resonating in full face helmets. If you mostly lead don't ride in groups in the middle or rarely get stuck behind slower sleds on crowded trails you may never notice it. Also not sure if EXUP helps mitigate it.
Right. The drone has nothing to do with the track. It's from the exhaust and only appears at constant throttle around 40ish mph give or take 10mph. It may be that certain windshields, riders sizes change the airflow around the sled and reduce the drone. Not sure. Exup sleds have it too.
 

Screw the rear exit exhaust. I loved it at first but now I hate it. The ice build up sucks and the exhaust parts can't take the abuse when ridden hard. I like it under the hood with the Skidoo 1200 and the SR Viper!
 
One of the reasons i bought the machine years ago is because of the exhaust . as for the drone noize ,i really dont recall hearing it when i stand up at that moment>? need some snow to verify .

What if you move up or back on the seat.? standing up or crouching down low? your head that is ,a couple feet to see if X is the spot.Drone.many variables ,this maybe why some hear it and some dont??
 


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