I am preparing an Atlanta 60 with a new inverted YS61 AR. The carb is only a few inches from the ground and I fly at a grass(with occassional small sandy spots) flying field. Does anyone have suggestions on whether to use an air filter and if so, which one? I have a Bru Line on a Rossi 61, however, the carb on the YS has a larger intake diameter. I'm not sure if it will stretch enough to fit the YS. Just curious if you guys have a suggestion. Thanks

Try Central Hobbies or Radio South for a filter, I believe they are made by Tettra. I'm sure they still sell them for the YS 4 strokes,
and you might luck out and find they have some on hand that were made for the YS 61.