7 month old MT-07LA model with 6500 km. Chains been cleaned and greased every 500-700km. I have maintained chain slack to spec and to be honest after the first adjustment it's remained perfect on its own accord. I purchased the bike new and initially had some rather bad rattling which was serviced and mostly resolved when they replaced the chain tensioner at 1000km I noticed the first ring broken between 1-2000km on the dial but since then I've noticed more. The ride is fine but I'm new to riding/chains and so Ive got no idea if this sort of thing is a problem or normal progression for chain..?