I have a suzuki intruder vl 125 and recently when waiting at a junction the engine has just died i have to keep the revs up to avoid stalling. also sometimes whilst moving the engine sounds like it dies. any idea where to purchase an exhaust for this model.

The stalling is due to the rectifier (its a box under the plastics on the bike and has fins on it) if not this then possibly an air/fuel mixture problem but as with my old vl it was the rectifier

Before chasing down carb solutions, get your choke mechanism checked, they have a tendancy to get stuck slightly on just enough to cause problems after a few miles (ie stalling when idling and stutering power). If this doesn't help then go for the carb check