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I was looking at the rotor housing plate of my rotax 650 seadoo engine and noticed something , Why has it the aluminium to put two extra nippels on it as shown in pictures . Is this for oil or some vacume or presure to manipulate the rotor disc , or other future plans . Can some one...

To keep it short I am used to work on yamaha and kawasaki this is new to me On the picture is a rotor cover/manifold of a 657 650cc seadoo engine it feels and looks like the rotor plate has digged it self into. The top cover for about 0,7 mm and left a upstanding ledge . In my opinion this...