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Elaboration on serval cylinders


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There web site is way out of date. They do make the cylinder

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The cylinder may not be on their site or updated due to the unfortunate health problems including the eventual death of CP Calvin Pollet who started the company. The port layout on a serval is different than a stock cylinder by having 6 transfer ports instead of 4 , a main exhaust port with two added auxillary ports instead of just one exhaust port and a much better layout. It is basically what we would love to have in a factory cylinder. Remember 800cc twin cyl pumpgas snowmobiles commonly have 160hp, yet we were given 30-40hp 350s. The serval in every way looks like a cub but the serval has much more rounded power delivery with much more useable power in the lower rpm ranges. A 100 hp cub for normal riding is very flat down low and then the power slams on very hard. The serval would be much more rideable in the range under say 5000 or 7000 rpms where a cub would be gutless. Hope that helps.

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