Hey all, I'm going to give in at the season's end and finally replace the stock chain on the A bike (2003 R6). It still has the lightweight (chuckle) DID ZLV 532 on it. I run steel sprockets to keep wear and costs down. Front still has no wear 15k miles later and it gets a rear sprocket every 5k-6k due to wear (Renthal Ultralite until they became unavailable). There is something to be said for heavy duty/big chains and a low budget! Likely going to a 520 (I'm not sure there is an advantage to go with a 525, but I'd like to hear opinions) as strength and durability have come a long way since 2003. What brand/model chains last the longest, and from which re-sellers can I pickup a chain/steel sprocket set on the cheap. Light weight isn't important to me, but longevity and reliability are. Thanks all!