Rear master cylinder help GL1100 - Steve Saunders Goldwing Forums

 
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post #1 of 7 (permalink) Old 02-20-2010, 07:08 PM Thread Starter
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Hi,finally startedrestoring a 1980 GL1100 that sat for years under a tarp; imho first place to start is the brakes.Have newrebuild kits for the calipers and master cylinders, however the rear master cylinder piston assembly, primary cup & spring will not budge. Have used compressed air and am soaking it with Kroil for now;there was muchrust on the piston & circlip. Am thinking it might just be better to ordernew master cylinders but would like an opinion or two first please.
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post #2 of 7 (permalink) Old 02-20-2010, 07:17 PM
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Hi Iz,

This one may break loose but if the walls are rusty...well you know. Those can be had used, from e-bay or your local junkyard. I usually opt for local so I can see the part before I commit. But since you already have the rebuild kit...

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post #3 of 7 (permalink) Old 02-20-2010, 08:28 PM
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If you can plumb in a grease fitting, you can use the hydraulic force of a grease gun to push it free!

If ya cant fix it with a hammer, it's prolly lectrical
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post #4 of 7 (permalink) Old 02-20-2010, 08:38 PM
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What hatchetman wrote, a 1/8 NPT grease fitting will screw into the banjo bolt hole good enough to hold the pressure of a grease gun. Don't screw it in tight, just snug and it won't damage the threads.

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post #5 of 7 (permalink) Old 02-20-2010, 08:41 PM
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i had to soak my rear master cylinder in pb blaster and diesel fuel for 4 days to get it to move if you could find one used that was in good shape carefull cuz the housing is aluminum if the cylinder had siezed to the housing it could ruin the housing

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post #6 of 7 (permalink) Old 03-27-2010, 11:34 AM Thread Starter
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Anyone know if the rear master cylinder is common to other Honda models?
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post #7 of 7 (permalink) Old 03-27-2010, 12:28 PM
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Go to oem honda motorcycle parts on the internet and look up part number of your rear caliper. On that same site, then punch in your part number and all the different bikes that came with that rear caliper will come up.

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