Thank you guys. I did call Sargent and it'll fit all earlier M bikes. Sweeeeeet. Hopefully, this virtually new seat will solve my sore butt issue. "all day riding comfort"? We'll see. For $75 I'll risk it. I had purchased an older Corbin from a member here. It WAS a little better than stock but not enough. I had also tried a gel insert with a touch more foam padding on the stock seat. It was just as uncomfortable as OEM.
Signed,
Princess and The Pea
I really like the foam Sargent uses. I had one of their seats on my SV650 and loved it. I tried one on my Monster but unfortunately didn't like it. It must have been shaped a little differently because it put a weird pressure on the bottom of my thighs. I hope you like yours though! If not, I recommend trying Top Sellerie. It's the 4th seat I've tried on my Monster and absolutely love it.