Hell yeah. Two stroke performance improvements on Victa's go back to the early 60's when they were first used in Go-Carts. The 125 engine started reaching the limits of reliability when power started climbing above 20hp I'm told.

[ummmmm, if you say so.]
I have a 125 Go-Cart engine with dual Tillotsen carbs, reed valves, magaphone exhaust, stuffed crankcase [using corks] & some cylinder & port mods that I could hardly believe. It also uses a flat top race piston with a modified special race head. It's fitted with high volume transfer port covers with external fastening [to remove the internal restriction of the original stud.]
One of these days I will get the right Mculloch chainsaw flywheel & magneto for it.
Aparently the Victa flywheels come apart rather badly at more than 10,000 rpm so i'm told.
I also built another 1956 model Victa 125 engine for mini bike use with single Tillotsen carb [Stihl chainsaw], modified race head, stuffed crankcase, enlarged ports & race type transfer port covers with waisted studs to hold them on.
These are both display-only engines these days. Photo's available on request.