Installed HEL banjo bolts with bleed nipple on Bosch ABS unit
I could hear air passing through the valves in the ABS unit again when applying the rear brake and didn't want to make a mess following the MV bleeding procedure where you untighten and tighten the banjo bolts on the ABS unit several times. This is not what you would call good engineering practice as the copper washer will strain harden and get damaged and at some point may not seal anymore.
I replaced the existing banjo bolts with 4 HEL banjo bolts with bleed nipple, part number H160-31BNC with new copper washers. Thread size is M10 x 1. See picture. If others want to do the same here are some of the things I did. If you now better don't bother me, you probably do.
I removed the passenger footrest on both sides. Removed the plastic cover around the ABS unit (three screws, one at each side and one underneath). Don't forget to place a rag/cloth or something underneath in case the small screws fall down. You can move the ABS unit down a little and have just enough access to the banjo bolts (12 mm socket).
Before you unscrew a banjo bolt make sure you put some rags/cloths underneath to make sure you don't get any brake fluid on painted surface. If you do clean immediately.
The HEL banjo needs a 14 mm socket and the bleed nipple is 11 mm. It takes a bit of feel and make sure not to cross threads in the ABS unit. Make sure you can screw them in by hand and torque the banjo to 18 Nm to 20 Nm (do not apply this torque on the bleed nipple itself of course!). I did them one by one. Take out the existing banjo bolt and washers, screw in the new banjo bolt with new washers, leave the bleed nipple out, tighten it and then install the bleed nipple. Some brake fluid will leak but mainly from the line coming from the front brake reservoir.
When everything is done you you can bleed the system, starting with the ABS unit.
Bleeding will never be easy because each time you have to get acces to the ABS unit but it will be a lot easier and not so messy and time consuming with this arrangement.
I have added some picture. It all fits with clearance.............no luck, just checked it before I started.