Will,

great info.

Size aside, the version we designed isn't quite conceived for a full blown 2-stroke tuned pipe. The model does present plans with a small tuned pipe on a 120 4-stroke. I'm not sure how well the larger and longer 140 pipe would fold into the design. Any thoughts?

What dimensions are you thinking of? I assume we're talking 2x2? 78" span? That would be only ~9% larger...

David