This is my first post here and hope you can help.
Recently bought a K1200GT 04 ( my first bike in 12 yrs and first BMW )
I thought I would replace the brake fluid but am not used to ABS etc.
see below for more facts but the basics are.
When I pull the brake lever ( front or back ) I hear what sounds like a motor whirring away in the ABS unit. (The noise you hear when the ignition is turned on.)
This continues to whir away all the time the brake is pulled and only goes off when released.
When the engine is running it is the same, and loud enough to hear. But I cannot hear it with the engine running and helmet on.
IS this NORMAL. I don't recall hearing this before but as I said I wasn't looking out for it.
Or could there be air in the ABS unit.
Reservoir did run dry.
Breaks seem to work fine and no lights on.
Break bleed did go a little wrong.
I started with the front L/h caliper and started bleeding.
Had some dramas but eventually realized that it works better with the ignition on
Anyway I inadvertently drained the reservoir under the seat. ( don't know how much it drained from the lines though. )
Once I realized this I filled it up and pulled fluid through on both calipers until all air had gone and the fluid was solid.
Have I pulled enough through is the question or could there now be air in the ABS unit.