? Engine swap Rotax 100 for 80

[Av8r3400]

I understand the concerns for wt. Which means, I would be doing myself a favor to lose 20#'s, on so many levels.

My plane would be a rocket ship if I did the same thing...

In regards to the speed issue. I think the fella told me he was getting 80kts.@5400 rpm. And I forgot to mention, w/o whel pants.

Was that a model IV? I ask this because the older 1-3 models this would sound more accurate. The under-cambered, earlier, wing is very draggy and therefore much slower. I fly without pants, too.