This reminds me of a time about 55 years ago when local member, Paul Champion, made his own 'silencer'.. From memory it was a bit of 2 inch pipe welded into a silencer body. He came to see me one evening, me living out in the country several hundred yards from a main road. He wanted my opinion as to whether it was too noisy. It was a quiet evening with little traffic and no wind. In all honesty it did not sound too bad. When he left I could hear him ride up to the main road, go along the main road for a couple of miles, go through the local market town of Hailsham, pull out on to the dual carriage way the other side of Hailsham and accelerate up to his house about half a mile up the road. Due to the modern wonders of Google Earth I have just measured the straight line distance from where I was to where he lived. 4.26 miles. Be warned