Greetings Ducatistis, I'm looking to do a brake fluid change on my Sf V4 however there is an additional step that I haven't done before and I can't find detailed run down of how to do it, so I was hoping to get some advice on it here. The step is compressing the pistons to remove any old fluid from the callipers. Here's my plan... 1. Starting with the furthest calliper from the brake lever. Follow the usual compress the lever, undo the screw on the calliper, bleed, tighten etc. etc. for several reservoirs to flush the main part of the line. 2. remove the calliper, place the cap back on the reservoir, and using a piston compression tool inserted between the pads, widen the gap (being careful not to fully compress the pistons?), open the bleeder valve, bleed fluid out, close bleeder valve. 3. Using the brake leaver and still with the pistons compressed and the calliper unmounted, bleed a little more out in case any old fluid has gone higher up the line than the bleeder valve. 4. Remove the tool and remount the calliper. 5. re-pressurise the system with the brake lever. 6 Bleed the nipple at the top, next to the brake lever. 7 Top up the reservoir. 7. Repeat for the other front calliper and the rear brake. Does this sound reasonable? Perhaps unmounting and compressing the pistons before bleeding anything might be more effective, but I was thinking an unmounted calliper might be more difficult to operate the bleeder valve on, and I was trying to minimise any potential damage to the brake pads when they have the tool, rather than the disk between them. Any thoughts greatly appreciated.
I usually crack and then nip the bleed nipples up with the calipers still fitted. Remove the calipers, remove the pads and then pump the pistons out slightly. Clean the calipers and pistons, fit the bleeder then push the pistons in by hand. Piece of wood between the pistons and then bleed the calipers as normal. Om some bikes you can activate the abs pump using Texa software but I seem to remember the last ducati I did required the back wheel to be locked to activate the pump and get the fluid moving inside
Forgot to say I usually syringe the reservoirs out and clean the bottom with a lint free cloth. Then put new fluid in before starting. Saves moving all the old fluid down the lines. You shouldn't get any air in the system if you are careful
