[DesertVenom]

I just pulled my GS550ES outa the shed after sitting for a year and it does this every spring. The rear brake plunger always seizes, the rubber seals inflate and its no longer good, can press down but it dosen't come back up. I have replaced this for the last 3 years and now i wanna find the problem. Its a $75 canadian rebuild kit for that plunger or whatever its called. It runs fine no matter how many miles i put on it, i average about ~5000 ~ 8000 of riding a year, What is causing this? is there moisture getting in maybe? something warped and or wore out? anyone with a GS have this problem??
Thanks

 

[dirtyfingers]

I'm not sure what you mean when you say "plunger" Does it have drum or disc brakes in back? And are we talking about the master cylinder or the caliper?

 

[MR. Ice]

Is this like a slave cylinder down near the break pedal?