I don't seem to have much drone at all at 70-75 in 6th gear! In fact it's downright quiet! Are you sure all your clamps are tight, maybe a leak somewhere? The only time mine even approaches a drone is in 4th or 5th gear around 1800-2000 mainly when laboring the engine going up a slight incline or depressing the throttle lightly to gain a little speed, otherwise no issue with drone at all! I hope you are able to resolve the problem! Have you called Steve or Jeff at Solo?
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