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).