Update:  XR6 has ordered a recon exchange 4 pipe series 1 ABS unit from me.  It's on it's in transit to him.

The day before his post an owner of a 2012 series 2 with similar issues contacted me for help.  He's removed the ABS unit and it's in transit to me from the east coast.  I'm on the west coast of Aus.  It will be interesting to see inside it as I've not had my hands on the 5 pipe unit.

On my Indian I predominately use the rear brake as it seems better than the front (which doesn't make any sense on any level).  The rear brake on my 2008 C14 was virtually useless as far as I was concerned.  The front warps rotors just as much as the C14 did..

ABS units are very reliable unless you never change the brake fluid.  I do it every year and then go out and stomp the heck out of the brakes to actuate the ABS function.  As Boomer said also there were issues with the rear brake master cylinder clogging up.

On my 08 it was congealed brake fluid in the rear Master Cylinder.
I ended up replacing the master cylinder.
I got lucky as it didn't affect the ABS pump.
It's my own fault as I rarely use the rear brake and hadn't bled it through with fresh fluid for 5+ years.
I now make a point of using the rear brake as often as I can and I bleed both brakes and the clutch through at least once per year.

GTR1400 2008

I have gone for a "Warrant of fitness" for my bike and the Rear Brake has stuck down and won't come back up. (There is no stone caught in the linkage.)

Can anyone help with the possible issue. A dealer that currently has the bike for "sale on behalf" recons it is likely the ABS pump. They have checked for seized piston and linkage and say its all free!!!???

I have changed brake fluid regularly but have never activated the ABS pump. Either riding the bike or activating it electronically. There is no ABS light on.

Thanks.