It would be best if we could hear the sound. Posting a video would be very helpful.
It shouldn't be anything with the belt clutches themselves as they are not rotating when at idle rpm.
Could possibly be the wet clutch shoes dragging on the drum...but it's only a guess without hearing the sound in person.
It shouldn't be anything with the belt clutches themselves as they are not rotating when at idle rpm.
Could possibly be the wet clutch shoes dragging on the drum...but it's only a guess without hearing the sound in person.