That's the pump I looked at.
My ears are not the best from spending my life around air tools and loud music. My pump sounds like a car with blower whine or gear drive when I stop, with my full face helmet on. I'm going to replace my fuel filter, since it's cheap enough and never been replaced during my ownership. My gas tank seal leaked water in last year and I think I checked the filter when I had the the tank off, can't remember. I ran water through the pump before I realized why it wouldn't start. Maybe it got noisier due to the intrusion. It doesn't seem likely, but it's certainly possible. My pump has always been noisy. I can live with an acceptable amount of noise, but the way it is now, I cannot see the first owner making it a few days without returning the bike. Of course, it is 2 decades older.