100% warranty. If you look at the warranty details it excludes 'wear items' but then goes on the describe items considered wear - bearing are not. I have had rear bearing and soon headstock b airing under warranty.
My inner bearing went. But the outer bearing sprocket side could be prematurely worn if chain to tight - only get out I can think of.
For my head bearings I did have to quote the warranty terms, especially when they started questioning the 40k miles the bike had, but that closed down the conversation quickly - Honda terms infer unlimited miles warranty,by s