After renewing the pads and bolt pins on my rear caliper last winter, I notice weak function of the rear brakes. 2003 model ST1300 ABS with around 70k miles.
When driving, the rear brake doesn't bring much deceleration, some slight diving of front fork. Front brake results in good deceleration combined with diving of the front fork. Pedals feel solid (don;t think air is the issue).
I thought the rear caliper may be seized mechanically, but all is free to move smoothly. When testing the functions on the center stand, I found following:
- When applying rear brake, rear wheel not turning. Front wheel has resistance, but I wouldn't say the brake is firmly engaged.
- When applying front brake, rear wheel is completely free to move. Front wheel locked firmly.
- Front left caliper : All moving freely.
- SMC : Seems seized, even when removed from the caliper.
I had a similar issue 3 years ago, where it seemed the SMC was locked, but when I removed the hoses and cleaned it, it was working fine.
Before ordering parts and taking everything apart, I wanted to consult the collective wisdom of this forum. Does it sound like a SMC issue ? Should I look at other parts (e.g. PCV or delay valve) as well ? I have more money than time, so like/need to get everything fixed correctly in one go..
When driving, the rear brake doesn't bring much deceleration, some slight diving of front fork. Front brake results in good deceleration combined with diving of the front fork. Pedals feel solid (don;t think air is the issue).
I thought the rear caliper may be seized mechanically, but all is free to move smoothly. When testing the functions on the center stand, I found following:
- When applying rear brake, rear wheel not turning. Front wheel has resistance, but I wouldn't say the brake is firmly engaged.
- When applying front brake, rear wheel is completely free to move. Front wheel locked firmly.
- Front left caliper : All moving freely.
- SMC : Seems seized, even when removed from the caliper.
I had a similar issue 3 years ago, where it seemed the SMC was locked, but when I removed the hoses and cleaned it, it was working fine.
Before ordering parts and taking everything apart, I wanted to consult the collective wisdom of this forum. Does it sound like a SMC issue ? Should I look at other parts (e.g. PCV or delay valve) as well ? I have more money than time, so like/need to get everything fixed correctly in one go..