Rear brake issue
 

Made a ride to a memorial down in NC last weekend. Bike ran and stopped perfectly. Got home Sunday and parked the bike in the garage. Didn't move it or do anything to it until Thursday. Go out, get on the bike and start out for some chow. Hit the rear brake as I eased down the driveway and the pedal went to the 'floor'. No stopping was had. Tried pumping it, no dice. Rode to dinner anyway since the front was still fine. Friday after work I checked for leaks at all the major junctions, none to be found. Pulled the read caliper, no signs of a leak anywhere. Changed the pads while I had it off, reinstalled and then bled the line. Few big air bubbles came out and a few worked themselves out of the master cylinder as I pumped the pedal. Once I was satisfied there was no more air coming out, buttoned it all up and took it for a ride. All worked well. Yesterday took a ride down to southern Maryland for a shindig and the brakes worked great down and back. Parked the scoot in the garage yesterday afternoon and it sat. This morning, drag it out to take a ride to a party and poof, no read brake again. I'm puzzled.....

What I know....I still need the recall performed as I've never had the rear brake light switch (which doesn't function) replaced.

My current plan is to bleed it again and take it in to get the switch replaced (which means they replace the line and will bleed it themselves).

Any ideas as to what may be causing my issues?

Thanks for the help!

ABS on the bike?

Maybe a "bleed" shuttle valve in the HCU (hydraulic control unit) is hanging in the 'Bleed Off" position?

Thus no pressure is applied to the rear brake, can you pull codes via the odometer trick?:blink:

The master cylinder plunger seal is bad. You have to replace it. It's a fairly easy job, BUT..... You MUST bleed the master cylinder PRIOR to reattaching the brake line. I think your scoot uses DOT 4 brake fluid, which means do NOT let it drip on any painted surface. IF it does, wipe immediately.

The cylinder rebuild kit is available from HD, and if I remember it costs like $85 bucks. It's ALMOST more cost effective to buy an new rear master cylinder!

PM me your addy again. I have the master cylinder bleed adapters you'll need.

I just came in from checking it out, the switch did have some evidence of a small leak on it. It'll be in the shop tomorrow for the replacement switch and then I'll see about the master cylinder. I'll letcha know once I have it back tomorrow evening.

So, next yime you are coming to SOMD let me know.

@$^&#/(*^#^43> 41

Droid Galaxy SIII is pretty nice

No kidding. When I was bleeding the lines, I spilled a teaspoon of DOT 4 on the table lift top. When I wiped it up, the paint underneath was all clean and no oil stains... I'm thinking about spilling it on the whole top.

:whistling:

WILCO!

Got the bike back today, and it was clean! They actually washed it!

Brake feels good. Will know after it sits tonight if the issue is gone. I now have brake lights when I hit my rear brake. Hopefully it's all better!

Hope the problem is solved!

Problem solved! Well mostly. Got the bike back the same day I dropped it off. Took it for a spin, I'm pretty sure they did a shitty bleed job because the pedal is mushy. Didn't have time to fix that before my trip this weekend, and I wanted to see if I'd have no feel in the pedal afterward. Still have brakes, although mushy, as they were when I picked it up. Headed out Thursday evening for Augusta and she rode fine the whole way. Nice to have brake lights with the rear pedal again. Will have to bleed them when I find time after I get home.

Thanks y'all!

Glad they got it.

Did they check your speedometer

Lets just mention here, I saw many a brake light switch recall preformed on Lincoln's and Mercury's.




Not once did I witness the tech doing the job bleed the brakes.

They didn't bleed mine when they did it

For?

Just kidding
Reference to Russ's bike