08-04-2021, 05:02 AM
Thanks guys, this is just what i pieced together in my head from what i have seen done to these modulators, for some reason i have taken an interest in engine fault finding.
Gone i have seen this procedure on the bmw's done and it seems the thing to do, ironically they also seem to have the highest failure rate ( mostly from worn out electric hydraulic pump motors ) from what i can gather, no such procedure is available for most abs motorcycles or cars for that matter that i am aware of but it highlights the need to maintain the fluid especially on bikes with an abs system to protect the modulator from internal corrosive buildup as mentioned before.
and yes, i have measured the moisture content in the fluid from the calipers only ( by compressing the pistons after cleaning them and emptying the calipers ) and the content was just as high as in the reservoir, so it works it's way through the system
My feeling is that the manufacturers rely on the abs system to operate from time to time to exercise the modulator and keep things operational, apart from our two documented cases i have not heard of any others so there does not seem to be a pandemic of failing abs systems happening, if this was the case there would be a lot of recalls.
It is a bit of a long video ( 1,5 hrs ) but Martin from Zams channel in Germany explains and takes apart an abs modulator, it is from a cb1000 which has been standing idle for 6 years according to his description, i learned a lot from this guy and have just enough of a grip on the German language so i can follow what he is saying
;
https://www.youtube.com/watch?v=XIDuxA2cJiM
Gone i have seen this procedure on the bmw's done and it seems the thing to do, ironically they also seem to have the highest failure rate ( mostly from worn out electric hydraulic pump motors ) from what i can gather, no such procedure is available for most abs motorcycles or cars for that matter that i am aware of but it highlights the need to maintain the fluid especially on bikes with an abs system to protect the modulator from internal corrosive buildup as mentioned before.
and yes, i have measured the moisture content in the fluid from the calipers only ( by compressing the pistons after cleaning them and emptying the calipers ) and the content was just as high as in the reservoir, so it works it's way through the system
My feeling is that the manufacturers rely on the abs system to operate from time to time to exercise the modulator and keep things operational, apart from our two documented cases i have not heard of any others so there does not seem to be a pandemic of failing abs systems happening, if this was the case there would be a lot of recalls.
It is a bit of a long video ( 1,5 hrs ) but Martin from Zams channel in Germany explains and takes apart an abs modulator, it is from a cb1000 which has been standing idle for 6 years according to his description, i learned a lot from this guy and have just enough of a grip on the German language so i can follow what he is saying
;https://www.youtube.com/watch?v=XIDuxA2cJiM