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Front Brake Caliper leaking after 3 attempts to rebuild
Hey Forum Gods -

I have resurrected an 85 GL1200 Interstate. It really didn't need much work, except for carb cleaning and rebuilding, and rebuilding the brake and clutch hydraulics.

The rear and right front caliper system rebuild worked perfectly on the first attempt. No leaks. Good stopping action.

The left front caliper/front brake rebuild is giving me fits. I've purchased three sets of caliper seals (at about $75USD each!). I cannot get the left caliper pistons to seal up. It's definitely leaking from one of the pistons. I've replaced the pistons too.

I have read the sticky threads in this section, but the website tells me the attachments no longer exist.

Does anyone have any suggestions? The front brake system works, but it seeps when parked, and slings brake fluid all over the disc and front wheel. I'm open to suggestions!


Joe C in NorCal
#1 03-15-2022, 07:56 PM,
Maybe you could try to find a complete new or secondhand caliper to replace the leaking one.
Jan Krijtenburg, a Dutch Winger
My bikes: Honda GL1200 Interstate and a BMW R1200GS
My personal Homepage:
Motormobilist website:
#2 03-16-2022, 12:24 PM,

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