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Discussion Starter #1
Have multiple Goldwings, but having issues with my 1980.
Need some assistance from the experts.

Brakes were very spongy and not effective.

Rebuilt both calipers:
  1. Removed and cleaned caliper
  2. Honed caliper
  3. Cleaned piston
  4. Replaced o-ring and pads
  5. Rebuilt main master brake cylinder
  6. Bleed both calipers utilizing suction bleeder at caliper
  7. Worked well to start with a little spongy feel
  8. Over night, the caliper totally leaked empty.
  9. Ordered new caliper pis

  10. question: Will honing out the caliper cause leaking? Original caliper
  11. Do I need to replace the caliper, if available? Where can I find any NOS units?
 

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If the piston is clean & smooth and the seal groove is clean & the proper seal it shouldn't leak.
 

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Honing is not a good idea but shouldnt cause a leak, more likely seal was damaged fitting the piston
 

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Discussion Starter #5
If the piston is clean & smooth and the seal groove is clean & the proper seal it shouldn't leak.
The piston and caliper had some rust. Cleaned well, cleaned seal grove, new seal. Ordered new piston and new seal. Hope this will work
 
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