Hi Fooks, Can somebody help me to find out what it is? When i ride slowly on my Dyna 99 i hear a strange sound from inside the engine. It is the same sound when you riding backwards with a car, it is a kind of screaming. (not that loud ) It comes only when i slowing down to my 2e or when i ride over a knob that is on the road (the ones you'll find on the road for slowing down car drivers). When i get over these knobs i hear a little screaming, not very loud. A friend of mine told me to inspect the primairy chain, it has a little too much play so i corrected this with success. It helped a little but not enough so thats not the problem i guess but probable it has something to do with it. Can somebody help me on this, thanks in advance Ruud Some bike details: Dyna Wide Glide customized to a kind of street bob, year 99 and 30.000 Km .