If it hasn’t loosened/stretched, and when you rotate the rear wheel, there are no tight spots, then why change it? An SV650 simply by being a twin, is a little harder on chains than an equivilent il4.
It’ll let you know when the chains knackered anyway, you’ll feel when it starts to get loose through he pegs with a mild grinding sensation anyway, and you’ll see it “sag”, when parked. If it’s done 6k, you’ll be lucky to get 20k out of a chain on an SV anyway, so you’ll be changing it sooner rather than later, if you do 1k miles a month like I do.
And don’t forget, when you change the chain, not changing the sprockets is a false economy. ONly time I did this, it literally halved the length of the life of the new chain. Unless you’re a handy diy’er, get the chain and sprockets both done together, when you have a service due anyway. And do join sv650.org – thats a great forum for sv owners.