first failure on the HP2, and i'm glad to say it wasn't because of anything I did. The gear indicator in the instrument pannel and the netural indicator light both went out. the neutral indicator wouldn't work at all, but he gear would show during up shift and crusing, but as soon as the clutch was pulled, or downshift, the indicator would go blank.
took it into Sierra BMW, and didn't want to press them, but instead of demanding immediate service ask to schedule a time to take the bike in. they had me wait a few minutes and then hooked it up to the machine. while they played with it I shopped for tires. $350 for tires.... ouch.. including mounting. i REALLY hope I can coax these tires to 6000 so I can get the next ones brand new for alaska. i'm going to go to something a little less agressive to ensure I can do the full 6000 to alaska without any trouble.
turns out, the failure was a loose electrical connection, probably both at the sensor and into the main computer. they have some name for it.. something like hspk or something.. can't remember. but they cleaned it with air, put dielectric griese on it and relearned the potentiometer settings for gear positions and its fine.
took about 1.5 hours from the time I pulled up because they were finishing some other work before they got going on mine. also got the factory update tire size sticker installed.
one other fault in the computer, something about loss of speed data, probably in line with the intermitten wiring contacts. that was cleared and i'm sure won't be a problem.
either no one noticed, or no one cared I patched the side of the valve cover with $2 epoxy. I was kind of wondering what they would say but no one mentioned it.