The Screw th m8x30mm (n ° 22) is a high-quality hexagonal head screw used to bridge the cylinder on the motor housing of the Rotax Dd2. With its length of 30 mm and its thread M8It ensures a solid grip in the low engine nets. She works in pairs with the stop washer (n ° 21) to ensure that the cylinder remains perfectly motionless despite repeated explosions.

The Circular membrane spring (70 x 1.7 x 0.3 mm) is the metal voltage ring that ensures the maintenance and tightness of the orange bellows base on the valve body. Its precise dimensions ensure a uniform pressure on the entire circumference of the membrane, condition sine qua non to the proper functioning of the pneumatic system.