HI
I started noticing this sound this morning, and I'm sure it's new (and not good) and it seemed to get worse though my riding today.
It is slightly hard to describe but I shall try.
- It does not happen when simply revving the engine in neutral.
- It seems to happen around 3k rpm when pulling away, just after the clutch bites and it starts to move.
- It sounds a little like one cylinder is 'stalling', a sort of knocking tapping sound.
- In general is sounds/feels a little 'rough'
- Seems fine at revs higher than 4-5k
I recently had a simple service: spark plugs, oil and oil filter.
Any ideas?