I swapped the 440 muffler for an 044 muffler (much larger outlet), leaned it out a bit, added the big dogs and tall clutch cover, and I've got an HD-2 in the shed for it.... But after running it today I think it's gonna need a bit more power! This saw is much nicer than the 044 I'm putting together, so it seems like a good candidate for the Mastermind jug I've been saving!
Both my 044s have the old "large hole" muffler, but the dp cover still wakes them up, I would add that also.
Usually U have to make it richer with the filter & muff mods. Make sure she 4 strokes.
I'm sure that jug will make a big difference, but put that HD-2 & a dp muff cover on it first and U will see a nice improvement.
Sorry to hijack UR thread John, but I hope U enjoy the info!