*** No Spring in my Secondary Master Cylinder? ***

[Lake Cle Elum]

So, last week I'm returning home from a 5 day trip in the rain and snow, still 200 miles from home when I slowed for a school zone using front brake only. W/O warning, my SMC didn't release and my rear wheel won't turn........So, long story short I limp home by pulling over and cracking the bleeder each time I need to use the brakes.

Get home, no movement at all on the SMC shaft connected to the piston. Bike is an '04 non-ABS with 87,000+ miles that I've owned since 6,800 miles in 2005. Yes, this bike has been in the rain a lot.

I pull the SMC apart, full of crap and crud.....What I find strange is: My shop manual shows a spring under the piston. Mine did not have a spring in it?? Did some come w/o, or was this left out on the assembly line? I have a rebuild kit on the way, will the kit include a spring? Thanks........

 

[ChucksKLRST]

yes it comes with a spring. It is on the bottom of the piston. Check and make sure it is not stuck in the bore of the smc. I rebuilt mine at 90K miles and 8.5 years.

 

[Lake Cle Elum]

Thanks Chuck, you were right, it was stuck in there. I have a big mess.....Bought an Ebay LF Caliper last night in case the bore on mine is too far gone.......Appreciate it........

 

[sennister]

Mine got stuck last summer at about 78,000 miles. Same deal but I caught it before it was ad bad as yours. I ordered a rebuild kit for something like $50. However it was on nation wide backorder. After a couple weeks I ordered a complete assembly. This doesn't include the caliper but was about $120. The bore looked fine it was an availability issue for me. The piston swelled up to the point that it offered too much resistance for the spring to push back.

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