Bikes been running a bit ropey lately ... So commenced the usual checks and everything seemed to be OK but bike still running bad.
So opened up the air box and cleaned everything .... Still Bad.
Out with the spark plugs ... Cleaned and checked ... Still Bad.
Hmmmm .... Didn't want to open up the fuel tank for the filters so thought sod it.
New cans arrived so I bolted them on, grabbed my laptop and went to load up the new PC2 map ... thought I would save the old one just in case ... When I tried to download it .. No Map

.. Everything was zeroed.
Seems the PC2 has dumped its map somewhere along the way. Anyway, fit new cans, load new map and bingo .. Bike running like new - Oh and that noise

.
So from now on .. 1st thing to check if the bikes suddenly starts running garbage is the PC2 map.

TLR's