Diffrent size front brake pistons side to side?


Information and questions on GL1100 Goldwings (1980-1983)
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Fetasigma
Posts: 19
Joined: Tue Sep 04, 2018 8:36 am
Location: United States
Motorcycle: 1981 gl1100, 2005 ultra classic

Diffrent size front brake pistons side to side?

Post by Fetasigma » Wed Sep 05, 2018 9:14 pm



I am pretty sure I already know the answer but are the pistons on the left and right front calipers diffrent sizes on a 81 Gl1100? I think the pervious owner had put on a caliper from another model Honda on the right side(looks very similar but not exactly the same, has Allen screws and comes apart, plus stamped on the back is a l for left). He used the stock backplate and it did work but the rebuild kit I bought for it from parts and more doesn't match



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Wilcoy02
Posts: 954
Joined: Sun Nov 21, 2010 11:37 pm
Location: Marengo, Ohio
Motorcycle: 1983 GL1100 I purchased 3/16

1983 GL1100I frame with an 80 engine. poor boy installed with C-5 ignition--DIED in Grande Prairie Alberta Canada 8/15


98 valkyrie sold 8/16

Re: Diffrent size front brake pistons side to side?

Post by Wilcoy02 » Wed Sep 05, 2018 9:49 pm

Honda part # 45107-415-006 is for the 81 front piston. Google the number and it will tell you a lot of info.
The parts catalog shows only 1 piston is required on 80 and 81
Last edited by Wilcoy02 on Wed Sep 05, 2018 10:01 pm, edited 1 time in total.

Fetasigma
Posts: 19
Joined: Tue Sep 04, 2018 8:36 am
Location: United States
Motorcycle: 1981 gl1100, 2005 ultra classic

Re: Diffrent size front brake pistons side to side?

Post by Fetasigma » Wed Sep 05, 2018 9:58 pm

Yeah according to everything I read all front and rear should be the same size piston

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Wilcoy02
Posts: 954
Joined: Sun Nov 21, 2010 11:37 pm
Location: Marengo, Ohio
Motorcycle: 1983 GL1100 I purchased 3/16

1983 GL1100I frame with an 80 engine. poor boy installed with C-5 ignition--DIED in Grande Prairie Alberta Canada 8/15


98 valkyrie sold 8/16

Re: Diffrent size front brake pistons side to side?

Post by Wilcoy02 » Wed Sep 05, 2018 10:03 pm

you are correct the same on f & r on the 80 & 81

Fetasigma
Posts: 19
Joined: Tue Sep 04, 2018 8:36 am
Location: United States
Motorcycle: 1981 gl1100, 2005 ultra classic

Re: Diffrent size front brake pistons side to side?

Post by Fetasigma » Wed Sep 05, 2018 10:09 pm

Off to ebay to find a new caliper that's correct, Thanks



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