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Hi thanks for summing it up again, those 3 points can be it i have a few friends now who also have this grounding problem with the regulator, all solved for good with the switch to press at start. my other parts are still fine and i do this method now for 50hrs runtime. Best regards

https://www.motoxparts.co.nz/tech/what-is-the-difference-between-a-a-b-… this article claims that either size A or B will be fine the 0.01 doenst matter at all i will measure my old piston and bore as good as possible , ktm says max difference is 0.07mm

no, you really have to study the schematics to see that only the regulator provides the ground for the main relaydriving the pump. the startbutton has 2 pins and only closes the magnetizing path of the starter relay.

i dont think so, i tested the relais and with manual grounding they work just fine since 30h of running the bike

did you fix the issue?

thanks for your feedback, than i have those CCs and gonna buy the correct springs for winter and let a shop revalve them. normally i do everything on my own but i think working on the cartridge is something an expert should get his hands on

according to the pic, which do you think i got CC or 4cs?

this should be my fork internals and partlist according to the spare parts catalogue

How do i recognize the 4cs? can i post a picture of the spare parts section of the disassembled fork that you can recognize some internal part identifying the 4cs vs. closed cartridge bladder fork? Best regards and many thanks for all you answers

Ok, i am 95kg with clothing i think this is way to much for the stock springs.normally they work fine but when i jump on flats from jumps with high edges it bottoms out

Exactly, i ground the white wire of the regulator with a momentary switch, a quick tap is just enough, than the ECU does something and grounds the wire of the power relay(pump etc.) by herself holding this state for approximately 20 seconds, you can hear the power relay click again after 20 seconds like when you press the starter button...

i made a tap to the regulator wire which connects to the wh-bl on the KTM harness so i can make sure that there is no open wire in the harness from the bike itself. the wh/bl changes color at the regulator to plain white.there i have my ground switch. its so convenient to slightly press the switch and then...

maybe the cheap regulators havent implemented this grounding feature/switch when receiving AC and are just the basic 4 wire shunt R/R with 5 wires, one doing nothing... i hope not

Hi, i have the new regulator unit at hands but i never changed it out. i have a small wire which i just tap to ground/frame and the fuel pump starts moving and than i just press the starter and the ECU grounds the fuel relay itself. i think this is a good anti theft measure but it would be...

Hey guys, for anyone else who has this problem i solved it now temporarely by wiring a small piece of wire in parallel to the white wire on the regulator. I just have to touch a piece of frame and start the bike afterwards. then the ECU is somehow providing ground internally for the power relay, keeping it actuated. i...

i would be very interested which circuit is inside of the reg switching the whiteblack/white wire on regulator to ground to energize the power relay coil. normally the regulator would only need 4 wires, 2 yellow ones for AC and + and -. A schematic would be really helpful.

did you ride the bike with the shorting trick for a few hours or did you change out the regulator immediately?