Just got my V65 SP delivered from Kansas on Wednesday. Was a bit disappointed to find the brake pedal did absolutely nothing to help stop the beast, on my initial ride. I guess that's the price you pay for buying sight-unseen, but I'm happy to have another project as it's been too long. I also wasn't getting the rear brake light when pushing the pedal.
I decided to try pumping fluid through the system as an initial experiment to see if it helped, as it couldn't get any worse, even if there was a little air left in the system. So I hooked up a clear bleed line to the rear caliper nipple, cracked the nipple and proceeded to pump with the foot brake. I managed to expel some dark, nasty looking brake fluid about an inch past the nipple, but whenever I released the pedal, it would simply suck it back in. I had topped up the fluid reservoir, but saw zero evidence of the fluid level dropping or mixing of dirty fluid with clear new fluid.
In frustration, I unscrewed the flexible line at the caliper, and when I disconnected it ,I barely got 2 drops of dirty fluid. Even lowering the end of the line below the master cylinder resulted in no more fluid coming out. I then disconnected the flexible line at the back of the m/c and there was a small amount of fluid, but that was it. I assume that's why I wasn't getting the brake light to work as there just wasn't enough fluid to activate it?
Next day I got a big syringe and attacked the front left caliper. I started but trying to pump fluid out of the system using the pedal - same result with nasty, dark fluid only moving an inch or so up the bleed line and then being sucked back in when the pedal was released. Moving on to the syringe, I tried to push fluid back to the m/c but all that happened was fluid peeing out of the nipple. I just couldn't get it past the caliper. Finally I disconnected the static line from the front caliper where it joins the back of the m/c and pushed clean fluid through using the syringe. Not much of the dirty fluid came though.....so a lot of air in there.
I then tried to push fluid from the rear caliper, using the syringe, but same issue - I just got massive pressure and couldn't get it past the m/c. Absolutely no movement of the fluid in the reservoir either. So I disconnected the fluid supply line from the reservoir, where it enters the m/c and it was full of fluid.
Why can't I get the m/c to suck in fluid from the reservoir, or push fluid past the m/c? Is this just due to too much air in the system. Would sticking pistons mean fluid wont make it past the calipers? The rear caliper does have the new anodized pistons, so it's had work done on the brakes at some stage. I'm wondering if the m/c was rebuilt incorrectly hence these issues...
Any input gladly received!
I decided to try pumping fluid through the system as an initial experiment to see if it helped, as it couldn't get any worse, even if there was a little air left in the system. So I hooked up a clear bleed line to the rear caliper nipple, cracked the nipple and proceeded to pump with the foot brake. I managed to expel some dark, nasty looking brake fluid about an inch past the nipple, but whenever I released the pedal, it would simply suck it back in. I had topped up the fluid reservoir, but saw zero evidence of the fluid level dropping or mixing of dirty fluid with clear new fluid.
In frustration, I unscrewed the flexible line at the caliper, and when I disconnected it ,I barely got 2 drops of dirty fluid. Even lowering the end of the line below the master cylinder resulted in no more fluid coming out. I then disconnected the flexible line at the back of the m/c and there was a small amount of fluid, but that was it. I assume that's why I wasn't getting the brake light to work as there just wasn't enough fluid to activate it?
Next day I got a big syringe and attacked the front left caliper. I started but trying to pump fluid out of the system using the pedal - same result with nasty, dark fluid only moving an inch or so up the bleed line and then being sucked back in when the pedal was released. Moving on to the syringe, I tried to push fluid back to the m/c but all that happened was fluid peeing out of the nipple. I just couldn't get it past the caliper. Finally I disconnected the static line from the front caliper where it joins the back of the m/c and pushed clean fluid through using the syringe. Not much of the dirty fluid came though.....so a lot of air in there.
I then tried to push fluid from the rear caliper, using the syringe, but same issue - I just got massive pressure and couldn't get it past the m/c. Absolutely no movement of the fluid in the reservoir either. So I disconnected the fluid supply line from the reservoir, where it enters the m/c and it was full of fluid.
Why can't I get the m/c to suck in fluid from the reservoir, or push fluid past the m/c? Is this just due to too much air in the system. Would sticking pistons mean fluid wont make it past the calipers? The rear caliper does have the new anodized pistons, so it's had work done on the brakes at some stage. I'm wondering if the m/c was rebuilt incorrectly hence these issues...
Any input gladly received!