Here's a pic of the big end bearings that show signs of slight wear through to the lower layers of material (copper, i think?) on the thrust side of the bearing.
At 240k kms, I dion't think this level of wear is beyond what could be expected.
However, I am wondering if the uber-high compression ratio (approx 12:1) might contribute to accelerated bearing wear as it must certainly increase bearing pressures - especially at low revs when oil pressure is not particularly high.
The bike, in this engine configuration, will idle up just about anywhere it'll get traction. Hmmmn, maybe I should check the new shells every 20 or 30k kms just to see how they hold up?