OK, I've got 40,000 + miles on the K1 sidecar rig, with the original BMW rear shock. I removed the spring during a driveshaft overhaul, and was pleased to find the shock still full of fluid and with good damping resistance. But scuttlebutt is that BMW original equipment shocks only last about 35,000 miles. I suspect I'll get maybe one more season out of the stocker, but I'm considering it's replacement.
What's your experience with aftermarket shocks, including Ohlins and Works Performance? Is the Ohlins that much better or easier to set up than the WP, considering the outlandish price difference? How long do the aftermarkets last, and can they be rebuilt?