Another tip I was given was to ram the piston in (and out) using a large screwdriver as this would give more oomph (better leverage) than relying on the brake lever.
This could prove difficult at 60mph IMO.
Another tip I was given was to ram the piston in (and out) using a large screwdriver as this would give more oomph (better leverage) than relying on the brake lever.
Well still no success bleeding the front brake. I have tried each and every method a number of times and still get air bubbles at first and when they go, no pressure at the lever. I wondered if I might have bought from Motorworks the wrong repair seals (kit) for the master cylinder so checked the number underneath the master cylinder (13) and yes, these were in fact what I fitted. Jim Cray suggested tapping the s/s lines with the handle of a screwdriver - I did but it no difference. Motorworks suggested my K1100 caliper was the problem as it's now fitted on the nearside ahead of the fork leg and back to front - but it worked OK before. He also suggested I undid the caliper and raised it a bit - I did but the s/s hose and steel brake pipe goes thought the mudguard and being rigid, I couldn't move it much.
It's getting very frustrating and whilst I've been successfully bleeding brakes on cars and bikes for years, I've never had this problem before. I know I'll go back tomorrow and find more air in the system. I always clamp the lever overnight too but with no pressure, that's bound not to work, and it doesn't.
But when the old rubber hose is replaced with the s/s one, air will get in and I'd be back to square one. I also thought about changing the s/s - steel pipe combination for a one piece s/s hose all the way to the caliper. This would at least allow me to swivel the caliper around a bit to extract that last air bubble.
I just can't believe that with all the pumping and various methods I've tried, there's still air in there. Perhaps as Motorworks said, "Non-standard fitment of the K1100 4-pot caliper, non-standard problems".
But thanks for your suggestion.
. I wondered if I might have bought from Motorworks the wrong repair seals (kit) for the master cylinder so checked the number underneath the master cylinder (13) and yes, these were in fact what I fitted. . .
You could try the caliper with another master cylinder such as the rear one or one off another bike - that way you would know whether it was the caliper or MC that was the problem.
Viv