Brake master cylinder question


Information and questions on GL1200 Goldwings (1984-1987)
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Taz1966
Posts: 8
Joined: Wed Apr 10, 2019 5:59 pm
Location: United States
Motorcycle: 1985 GL 1200I
1984 GL 1200I

Brake master cylinder question

Post by Taz1966 »



I've got a 1984 Honda Goldwing 1200, does anyone know if the little hole in the master cylinder for the front brakes has a one-way check valve in it or is it just a small hole that goes all the way through???



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oldishwinger
Posts: 414
Joined: Sun Jul 14, 2013 11:26 pm
Location: New Zealand
Motorcycle: 1986 GL1200 Aspencade

Re: Brake master cylinder question

Post by oldishwinger »

as far as I know, there is no check valve, its a return hole that goes through to the piston, when I put a new kit in, I was able to check the hole by blowing a little brake cleaner through it, and it showed up in the barrel.

there is a small baffle, that goes over the hole in the reservoir, i would assume this is to stop blow back.

Taz1966
Posts: 8
Joined: Wed Apr 10, 2019 5:59 pm
Location: United States
Motorcycle: 1985 GL 1200I
1984 GL 1200I

Re: Brake master cylinder question

Post by Taz1966 »

Ok thanks, I wasn't sure and needed to find out. Mines totally stopped up and was going to run a extra small drill bit (about a size 80) with my pinvise down it to clear it.

User avatar
oldishwinger
Posts: 414
Joined: Sun Jul 14, 2013 11:26 pm
Location: New Zealand
Motorcycle: 1986 GL1200 Aspencade

Re: Brake master cylinder question

Post by oldishwinger »

Taz1966 wrote:
Tue May 28, 2019 8:18 am
Ok thanks, I wasn't sure and needed to find out. Mines totally stopped up and was going to run a extra small drill bit (about a size 80) with my pinvise down it to clear it.
a can of spray brake disc cleaner with straw will clear the hole, dry quickly and leave no residue



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