High-G FJR Junkie!
Join Date: Jan 2013
Location: Millgrove, ON, CA
It is a bit unusual to have blockage in the fronts, usually if there are ABS issues, it's the rears.....
Taking a wild guess that the ABS pump has not been cycled regularly to prevent issues, you have "clotted" old fluid in the ABS pump circuit, which you may have moved along to the regular brake lines when you did the ABS cycle. You may have a blockage (likely closer to the pump than upstream).
I'd say cycle that ABS some more (multiple times, attempting bleeds in between attempts), see if the blockage moves along and eventually makes it to a caliper. You CAN if you wish, loosen the fittings at the ABS pump, pump the brakes to ensure no air is trapped there and perhaps it will be enough to push things along. Other than that, I know of nothing else except to flush the lines with a solvent..... rubbing alcohol won't hurt anything but is the best thing to clean up brake fluid spills, etc. so should help dissolve a clot. You could try Seafoam (contains naptha as well as rubbing alcohol), as naptha is a mild slow-acting solvent. Acetone (or other harsh chemicals) to me seems a little harsh, may affect the linings of rubber brake lines or caliper seals or rubber bits in the master cylinder... last resort. If going there, I'd get a master cylinder kit and caliper seal kit and once you have everything flushed with new fluid, replace all that rubber stuff. Being an '06, won't hurt to do that anyway, it's getting old.
Be prepared to spend some time on this to give the solvents time to work. Another thought, remove the fittings at the ABS pump, including the proportioning valve and metering valve (which modulate fluid flow to the rear brakes), shoot alcohol in with a syringe via a bleeder screw one at a time until you have nothing but alcohol flowing in each line...... have lots of alcohol on hand, cheap at Walmart, use it to clean and rinse stuff off as you go.
All the brake lines lead to the ABS pump before they go to the calipers...... kee[ us posted on what you try, and what success if any you have, maybe we'll come up with something else.
Keep yer stick on the ice....
2014 FJR1300A - Root Beer