Full description: why an original seal?

When opens a motor, the central seal is the part to never neglect:

1. Pneumatic sealing: The low drinking of a 2-stroke works like a pump. The slightest leak at the central seal plane causes an air intake, impoverishes the mixture and can cause motor tightening.

2. Calibrated thickness: The thickness of this seal is calculated by Rotax To guarantee the correct "lateral game" of the transmission and crankshaft trees. An adaptable seal too thin or too thick can bride the engine or create an excessive game.

3. Chemical resistance: The material is treated not to disintegrate into contact with the gasoline / oil mixture and gearbox oils (XPS).

4. Precision cutting: The passages for studs and transfer ducts are perfectly aligned, avoiding any restriction of gas flow.

💡 Michel's trick

"The guys, the central seal, it's 'One Shot'! Once the housings are tight, the seal crashes to take its shape. If you reopen, change it systematically. My old wolf board: Prohibition of putting the dough seal everywhere! If you put too much, it will overflow inside, plug the lubrication ducts or finish in your transfers. If your seal plans are clean and smooth, the paper seal is self-sufficient. A slight grease or oil film on the seal before laying it is all it takes for it to place well. "

🎓 TUTO: mounting and closing

1. Surface preparation: Clean the seal planes of the two half-caders using a plastic scraper (not to scratch the aluminum) and drop them out perfectly to the brake cleaner.

2. Positioning: Place the gasket on the left crankcase by helping centering pins. The seal must adjust without forcing.

3. Closing: Present the right housing. Make sure all trees (crankshaft, pendulum, transmission) are aligned in their respective bearings.

4. Tightening: Tighten the crankcase screws in "Cross" to distribute the pressure evenly on the seal. Respect the recommended tightening torque (about 10 nm).

✅ Features

• Reference Rotax : 250512

• Material: High strength seal paper

• Compatibility: Rotax 125 Max, Junior, Senior, Master, Micro, Mini and DD2.

• Usage: Sealing between the Motor Carters.

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