After riding the Empulse for one year now, rain, snow or shine, and 17,000 km on the odo. the chain and sprockets are still OK.
17K by itself is not a noticable performance for an O-ring chain, but I only had to adjust it once, half a turn on the (shortened) bolts.
Apart from that, there is virtually no maintenance on the chain.
The wheel bearings failed at some point, that illustrates the harsh conditions the bike went trough.
Also a luggage strap caught the chain guard and ripped the end off. Luckily the dual nozzle from the chain oiler stayed intact.
The Pro-Oiler chain oiler system never failed to pick up satellite signals and adjusted the oil flow very economically accordingly, I topped up the system twice with about 100ml. 5W30 engine oil (left over from my car)
