Whatever event that $43 motor fits in.
Well, your modified motor wouldn't work for Sportsman GY as it's been defined.
"Engines must be of stock configuration only. No material may be added or removed (except through
normal wear and use), except the engine mounting holes may be enlarged or elongated. No non-stock
parts may be substituted except for the glow plug, venturi, needle valve assembly, ball bearings,
gaskets, screws, prop washer and prop nut."
And that, after all, WAS the context of the OP.
But I WOULD like to know what mod you mean. Care to share?