Thunder 4 SV
27
1
Unscrew the 2 screws located on the inner front part of the helmet using an Allen
key No.2.
2
Push the ventilation piece from the exterior of the helmet to release it
from the anchor.
1
Slide backwards the air intake lock mechanism to expose the two screws.
2
Unscrew the screws located at the rear of the ventilation using a Allen key No.2.
1
1 2
2