rear master cylinder compatability


Information and questions on GL1100 Goldwings (1980-1983)
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pschweitzer
Posts: 74
Joined: Mon Jun 10, 2013 6:03 pm
Location: Warrenton, Virginia
Motorcycle: 1983 Goldwing Interstate GL1100I

rear master cylinder compatability

Postby pschweitzer » Sun May 29, 2016 10:12 am



I have an 83 Interstate. My rear master needed to be unclogged and probably rebuilt. I was able to find and pick up a rebuilt one on e-bay for an '82 before I realized there was a difference in the lines. The '83 has hardlines and a flare nut to the proportioning valve. Can an '82 master still work on the '83 (i.e. will the flare nut fit where the banjo bolt goes)? If not is there an adapter option. The other option is to resell this master and get a rebuild kit. I was hoping for an easier way out.



4wred
Posts: 151
Joined: Sat May 17, 2014 8:42 pm
Location: lancaster pa
Motorcycle: 82 goldwing aspencade
82 aspy turned naked (sold)
89 suzuki gsx 1100F

Re: rear master cylinder compatability

Postby 4wred » Mon May 30, 2016 7:24 am

I think the 83 has linked brakes.Don't know if you can use that master on your 83.

User avatar
redbug
Posts: 256
Joined: Fri Sep 30, 2011 8:22 am
Location: Broken Arrow,Ok
Motorcycle: 1983 Gl1100I
1986 Harley FLHT

Re: rear master cylinder compatability

Postby redbug » Mon May 30, 2016 8:34 am

The easy way out is to rebuild the master cylinder. 83 master cylinder is a one of a kind as it operates one rotor up front as well as the rear. You can use the 82 but...you loose a rotor up front unless you change the system and tee off the front master cylinder for both front rotors. It has been done. I would rebuild the original master cylinder and go on . There are articles on this in the 1100 area reference. Hope that helps you .
" Ridin on Tulsa Time "

pschweitzer
Posts: 74
Joined: Mon Jun 10, 2013 6:03 pm
Location: Warrenton, Virginia
Motorcycle: 1983 Goldwing Interstate GL1100I

Re: rear master cylinder compatability

Postby pschweitzer » Mon May 30, 2016 10:11 am

You wish if Honda made a change like that would at least make the part look different. From my research the only difference other than the connection is the bore size. The '82 is 14mm and the '83 with linked brakes is about 15.7mm most likely for the extra volume for the front and rear. Oh well, I've rebuilt the master before and it wasn't bad. It was only a couple of years ago so everything should come apart pretty easily. A couple of nights of small parts cleaning and fixing in the RV for me I guess.

Anyone need a rebuilt rear MC for an '82?




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