Exhaust guillotine body Rotax Max (7)

The guillotine body is not just a support, it fills three vital mechanical functions for your engine Rotax Max :

1. Precision guidance: Its main function is to keep the guillotine (valve) in a perfect axis. For the valve to mount and descend instantly depending on the engine speed, the body 7 offers a machined micron sliding channel. Fluid guidance is the key to prevent "holes" with acceleration.

2. Pneumatic compression chamber: It is in this body that the magic of the system takes place Rotax. It comprises an internal conduit which routes the pressure of the exhaust gas to the bellows. This pressure is used to remove the valve automatically as soon as the motor reaches its power speed (about 7,500 rpm).

3. Regulation of gas flows: By acting as a waterproof barrier, it forces the exhaust gas to follow the main conduit when the valve is closed (promoting the torque at low speed), then allows their total release when the valve goes up (promoting advanced speed).

In summary, the guillotine body is the mechanical "brain" that allows your engine to be both flexible on a tight and ultra-efficient turn in a straight line.

? Michel's trick

"Attention guys, number 7 is the problem nest if we do not care! When you go back the body on the cylinder, always check that the small depression hole is not clogged with old oil. If it's clogged, your valve will never open, even if all the rest is new. A little brake cleaner and a blower is the minimum at each revision! "

? TUTO: mounting of guillotine body

1. Cleaning the seal plan: Before setting the body (N ° 7), make sure the support face on the cylinder is perfectly clean.

2. Installation of the seal: Place the new paper seal between the cylinder and the body. Do not put a joint dough, it might clog the ducts.

3. Tightening: Attach the body with the two screws M6. Tighten uniformly (recommended torque: about 10 nm) to avoid veiling the room.

4. Verification: Insert the naked guillotine inside. She must fall deeply by her own weight. If it hangs, clean the inside of the body with very fine steel wool.