97 SD GSX 787 Top End Rebuild help needed! - Blogs - PWCToday

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97 SD GSX 787 Top End Rebuild help needed!

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Good Morning Everyone,

I have a SD GSX 787 that I am rebuilding the top end on due to a cracked jug in the outside of the water jacket. I figured F&&k it Iím here so letís do it! I have noticed that my pistons and rings are different between my PTO and Mag cylinders as well as the rings. The front cylinder (PTO I believe) has standard rings and piston. The rear (Mag) the top ring appears to be stepped and the rings I bought both came with a stepped ring. Is this setup supposed to be correct or not? My apologies if I mixed up some information or my explanation was difficult to understand! I am a newbie to PWCs, with some mechanical ability/ understanding.

Thank you!


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