ORIGINAL: Kaos
ORIGINAL: Artisan
Most of the newer .60 size two-strokes are built in larger crankcases than the old pattern engines that we remember. Especially OS and Super Tigre. These two manufacturers have one crankcase size for their .61 thru .91 sized engines. This makes the .61 heavy and large and the .91 weaker than the old .91 engines because of the smaller porting area (bypass port).
Maybe I did good in selecting a new Super Tigre G.75 for my new Killer Chaos
Kaos
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If you end up needing another .75, please consider the Tower .75. Lots and lots of glowingly good reports. Some say it dominates the .75 class in power and reliability.
Meanwhile, I'm sure you will be happy with your ST .75. Good luck.