Headache with Brakes, any help appreciated

Gungurdin

Joined
Nov 3, 2025
Messages
2
Age
60
Location
Shropshire
Bike
ST1300
Hi All,
I have a 2007 ST1300A and recently had a problem where the front left hand caliper detached from the bike (dont ask) resulting in me having no breaks but having to use what i did have until they failed completely.... The result, rebuilt the SMC with new parts, the screen filter is clean and the port free of blockages, rebuilt the master brake cylinder fitted new pads and have bled the system according to the Honda process steps. The calipers were all serviced in December of 25 and were working perfectly prior to the event. When i was fitting the new pads i noticed that as i pushed a piston in (centre) the two outers on the rear caliper would come out and vice versa. Fitted the pads all round and both the lever and the pedal felt good. However, after depressing the rear brake pedal the rear wheel is solid and does not rotate, if i crack the outer bleed nipple the wheel will turn. the fronts wheel is also binding slightly. I have never experienced this with a bike before but have with a car where the flexible brake hose had failed and would allow fluid to go one way but not return creating the same issue. Any advice on how to identify which pipe could be causing this as im guessing it could be any given the interlinked nature of the system would be appreciated. Another thing to note is that when the brakes failed the front brake leaver went solid and the rear pedal just traveled to the lower point. I have throughly bled the brakes and am sure that there is no air in the lines.
Thanks in advance
Stuart
 
If a locked rear wheel can be released by opening the bleed nipple it is almost guaranteed that the itty bitty tiny port in the SMC is blocked. As @Sadlsor said, there have been very very few successful SMC rebuilds, and I remember at least one of these was reported to fail roughly 6 months after the rebuild. (That thread is long since gone in the big evaporation.)

Just one question, did you perform the 7 step brake bleeding procedure outlined in the Honda Service Manual?

You are not a likely candidate to get Larry's help via phone since you are across the pond, however, I suggest you go to Articles>ST1300 and search for @jfheath's dissertation on the 1300's brakes.
 
Google Meet is free, with the advantage of love video.
Apples Face Time may be an option, or even Zoom.
"We can rebuild it / him.
We have the technology."
Not referring to the SMC rebuild kit, but rather the 1970s TV show "The 6 Million Dollar Man."
 
SMSW said:
If a locked rear wheel can be released by opening the bleed nipple it is almost guaranteed that the itty bitty tiny port in the SMC is blocked. As @Sadlsor said, there have been very very few successful SMC rebuilds, and I remember at least one of these was reported to fail roughly 6 months after the rebuild. (That thread is long since gone in the big evaporation.)

Just one question, did you perform the 7 step brake bleeding procedure outlined in the Honda Service Manual?

You are not a likely candidate to get Larry's help via phone since you are across the pond, however, I suggest you go to Articles>ST1300 and search for @jfheath's dissertation on the 1300's brakes.
Click to expand...
Hi, thanks for the reply, i am sure as i can be that the SMC rebuild is good and that the port is clear. I have concluded from yesterdays efforts that i will go back through the calipers and ensure all is good with them and not assume that they are given the December work. I will be on that this evening.
I did follow the bleeding process to the letter. :)
 
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