Edstar

Thanks for the reply TCat I changed the oil to a castrol 20-50 and it is quieter, but still there . I will ride it and see how it goes

The bike is a 2005 roadstar 1700. I bought the bike used, has 7000 kms, about 3500 miles. I've only had it for days, took my first good cruise on it when I noticed between 1500-2000 rpm's under light acceleration a light engine knock. It wasn't there when I started out, so it seems to happen only when the engine is warmed up. I use to dyno test engines for a living and am used to listening for all kinds of noises, maybe this is what it's suppose to sound like? It has cobra pipes and has been re-jetted. Any ideas? Sure do love the bike and am hoping this is nothing to be concerned about. Can any one help?