Originally Posted By Phil Bleazey
What the clonks are, in reality, caused by is the winding up of the NVH kit which, when you go over a bump, unwinds suddenly to bring the bevel box down with a clonk against the chassis. Tightening the belt pulls the bevel box back and up at the front and so relieves the problem but only temporarily.


Mine is pre NVH but tightening the drive belt seems to have cured the recent clonks smile

They only occurred at 3,000 rpm and felt "lighter" than the bevel box knocking which still occurs very occasionally when going on/off power.

Red Leader drive