10-01-2023, 08:18 AM
This may not relate directly, but I think should be considered. Here on the west coast of North America(Washington State) I rode a Velocette. It had a straight intake with no filter. I didn't have an issue for several years. I then took a tour which included a trip to a friend in northern California. I rode about five miles on a dusty road to his home. On the way back to Washington, I had so little compression it was hard to start. When I got home the intake valve was badly pitted. I think it depends on the environment. A few miles of dust can impact an engine. I would not be averse to carrying a detachable filter for those potential times when I would encounter dusty conditions. This may not be an issue in most environments but something to consider.
Erich in Mukilteo
Erich in Mukilteo