GL1200 Front Caliper Rebuild question - Steve Saunders Goldwing Forums
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post #1 of 6 (permalink) Old 08-27-2019, 09:12 PM Thread Starter
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Howard Allen's Avatar
Join Date: Aug 2019
Location: Limington, Maine
Year: 1985
Make: honda
Model: GL12001
Posts: 9
GL1200 Front Caliper Rebuild question

OK, so I took my LH caliper apart and found the pistons are bad. I ordered the rebuild kit and it came today but the rubber O rings are the wrong size (about 28mm) The originals are 33mm. In researching what is going on it almost looks like the LH and RH pistons are different sizes. Can someone confirm this?

Second question - is there a good source for quality replacement pistons, both of mine have lateral corrosion which is probably why it was leaking. I cannot buff it out, it is too deep.

Help! Want to get this bike on the road for fall riding season

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post #2 of 6 (permalink) Old 08-27-2019, 09:19 PM
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Location: Maumelle, Arkansas, USA
Year: 2004
Make: Honda
Model: , 1982 GL1100 Standard, 2004 GL 1800
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try David Silver Spares.
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post #3 of 6 (permalink) Old 08-27-2019, 10:02 PM
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Location: Glendale, Arizona, USA
Model: 1987 GL1200 Interstate 290,000 miles
Posts: 21,836
Yes, left and right are different. The correct rebuild parts, including pads, can be purchased through your local Honda dealer. I wouldn't use anything else.

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post #4 of 6 (permalink) Old 08-28-2019, 09:49 PM
Mike Myers's Avatar
Join Date: Jun 2014
Location: UFO's R Us, North Mexico
Year: 84 GL 1200
Make: Honda
Model: 84 Aspencade
Posts: 356
so L hand brake side caliper is BIGGER than R side (combined brakes) caliper? right side/rear are same size caliper pistons?

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post #5 of 6 (permalink) Old 08-28-2019, 10:10 PM
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Location: Chilliwack, British Columbia, Canada
Model: 1984 Interstate "Canadian"
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The rear and left side pistons are the same size.

Advise given here is free and comes with no warranty "Caveat emptor"

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post #6 of 6 (permalink) Old 08-29-2019, 07:59 PM
Join Date: Jun 2019
Location: Gloucester, England
Year: 1988
Make: Honda
Model: GL1500
Posts: 64
Dont forget to polish the sliders to within an inch of their life and the bores they slide in, use lots of copper grease on assembly and replace the rubber boots if any damage at all.
Rebuild is an anual jod with road salt here in UK
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