They do charge for it, i bought a BMW S1000RR a few years back and when taking it for a service with the dealership they advise they charged if i wanted the chain adjusted on the service. I did complain saying i bought the bike from them and they did waive the charge. Have to agree though it should be done as part of the service, the other thing i used to do was take a can of Worth Dry chain lube as the stuff they put on was like splatter muck it got every where.
If they serviced it try saying surely it should be included....
