Re: Installed adjustable prop. valve....same thing
Sounds like one I had today - front disc brakes, drums rear.
Not much pressure to the front - rear was fine.
Already had new hoses, new calipers, pads, everything,
he even blew the lines out.
He trailered it to me.
He'd been bleeding it till he was blue in the face.
Sometimes air gets trapped in the M/C. Bleeding at the wheels
doesn't get it out because it's not developing enough pressure
to force it out.
Try bench bleeding the M/C - even if you already did, try it
You don't have to take it out - put a fitting in the M/C
outlet so you can put a hose on it, preferably a clear hose
so you can see the bubbles. Run the other end of the short
hose back into the resavoir. Pump it slowly, watch the fluid
get sucked back from the resavoir into the cylinder.
It "primes" the cylinder so it can produce enough pressure
to bleed the system properly.
Parts houses have "kits" for bench bleeding, makes it easy.