I have also posted this to the trailriding group - but it (the group) does not seem much attended. .. .. My new XT600E is now run in (1250 miles) and I'd like to buy it a new exhaust. I think the original might be stifling it a bit. If anyone has experience of changing the exhaust system please let me know; what make and whether it made any difference to the bike. I imagine that in time the steel pipes and box will rust through and I'll end up with a stainless system anyway - it might as well be now as later. Thanks John