<https://www.goldwingfacts.com/threads/1983-gl1100i-front-brake-caliper.334992/>
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"imported post\n\nI ran into a slight problem when performing a rebuild on both of my front brake calipers for my 1983 GL1100 Interstate. I ordered two caliper rebuild kits (one for the left, and one for the right caliper). Both caliper rebuild kits were the same.\n\nHowever, when I took off the calipers, the pistons are different sizes in both of the calipers. That means that my rebuild kits only fit one of the calipers. The caliper that fits with the rebuild kit is the right front caliper (the one that is linked with the rear brake). The left front caliper has pistons that are slightly larger than the right caliper, and therefore the rebuild kit seals are too small for these pistons.\n\nI was wondering if this piston difference between the front left and right calipers is standard, or if my bike has a caliper from a different year on it. Second, how do I go about buying a rebuild kit for the left front caliper?"
<https://www.goldwingfacts.com/threads/1983-gl1100i-front-brake-caliper.334992/#post-812528>