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The new type “995” engine, or more commonly known as the Rotax 1000 SDI, may use two different piston sizes. Each cylinder and pistons...

The new type “995” engine, or more commonly known as the Rotax 1000 SDI, may use two different piston sizes. Each cylinder and pistons is identified with either an “A” or a “B” designation. This identifier is found on top of the piston crown, and off to the side of the exhaust port on each of the cylinders. A cylinder block may use two different sizes of pistons, and you MUST match piston “A” with cylinder “A” and piston “B” with cylinder “B”.

When a cylinder needs to be replaced, the cylinder block comes as an assembly with two pistons if you order the cylinder block from Ski-Doo. Even if only one cylinder is damaged, you replace all of them together.

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