Riding a 750 K3. Replaced rear chain April of 2017 with a cheap standard non-o-ring chain off Ebay. (Yeah, I know.) Running standard sprockets and a 100 link chain. Have 2900 miles on the chain and have faithfully, about every 300 miles, waxed the chain. Also have adjusted for stretch, which I think has been significant. In that time adjusters at rear wheel have gone from all the way in, or the zero mark, out to the second.
Most of my searches, here and elsewhere "chalk" this red dust up to chain rust. First time I noticed this was about a month ago after riding a dirt road. Cleaned chain and front sprocket well. Finished 700 miles just recently over 4 days and had 2 days of rain and noticed the red dust again when I got back.
Can you confirm (cheap) chain rust and nothing else going on? (When I had the chain oiler opened up she was throwing way too much so closed it down entirely.) I have no problem buying a quality chain, just want to be sure that is the cause. Pics attached.
Thanks.