KTM 990/1190/1290 RC8 fuel pump filter checking/cleaning
How to clean EFI pump fuel filters?
The procedure of KTM fuel pump filters cleaning is pretty simple, but there are three factors to evaluate:
1) Status of the filters: colour will not tell you much, pigments are far smaller than what the filter is supposed to block, you have to check the pressure drop or resistance of the media itself, simply put the filter in a glas jar ( I prefere the big ones from carciofini alla romana haahah) and blow in the plastic adapter, the air should come out like a fine cloud, if not the filter is blocked. same procedure with the paper filter,
2) If the paper filter exploded, there is no way to cure it and so you will have to buy a new complete kit
3) If you were prefiltering at fuel cap, there will always be the chance to save your fuel filters
Take the jar and put one cm of fuel injector cleaner solution at the bottom, fill up with fresh petrol until the lower lip of the plastic adapter and let it soak for some time. As for the paper, just let it sink and gently shake it :)
Then, blow the prefilter gently from inside and repeat the procedure until you will see if it is clean and air passes fast and easy.
They will come back as clean and free as new :)
DO NOT GO SO FAR, check it and clean KTM fuel pump filters before.
And... prefilter at neck with GUGLATECH !!!