| I thought it may be the pipes touching the subframe, as they are pretty close, but even with a pillion on the back, the subframe doesnt move nor to the pipes.
I reckon its a radiator / motor vibe thing just around 4000 rpm, sounds a bit like goosed main bearings (which is what i thought it was at first till i worked out it only does it 2 up) | 
Hybrid Mode
