Brake fluid reservoir vent.

From time to time the question has come up weather the brake fluid reservoir is vented. I think this picture will show how it is vented to the atmosphere.  Howard

https://goo.gl/photos/pLd4m3Q9eWyHFkVX8

Your link doesn't work unless you have a Google account which is something I don't have or want.

I'd argue that the Silverwing as well as the Goldwing do not have direct atmospheric venting. There is a flexible diaphragm on top of the fluid that prevents contact between the brake fluid and the air. The diaphragm follows the surface of the fluid in the reservoir as it drops due to brake pad wear with out allowing vacuum to built up on the fluid in the reservoir.

The reason is that brake fluid is highly hygroscopic. It will absorb moisture from the air. Most service manuals will say only to use fluid from unopened containers of brake fluid to insure no moisture is introduced into the system. Water will cause corrosion in the brake system.

http://www.motogrid.com/OEMpartfinder.htm?aribrand=HOM#/Honda/FSC600AAC_(07)_MOTOR_SCOOTER,_JPN,_VIN%23_JH2PF014-7K400001_TO_JH2PF014-7K499999/FRONT_BRAKE_MASTER_CYLINDER_(FSC600A)/FSC600A-07-JPN-AC/2Y14MCT601AMCTAF0400AD

exavid wrote:

Your link doesn't work unless you have a Google account which is something I don't have or want.

I have a google account & it doesn't work for me