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Makes And Models => Zero Motorcycles Forum | 2013+ => Topic started by: Say10 15FX 16FXS on November 06, 2018, 02:53:14 PM

Title: Filling the rear master cylinder on the FX/FXS.
Post by: Say10 15FX 16FXS on November 06, 2018, 02:53:14 PM
After switching my rear pads to EBC FA208HH on my ‘16 FXS, after some miles I noticed that the rear master cylinder level was low. I was going about filling it but it is not easily accessible and quite small on the FXS (FX is even smaller). Spent a while thinking about different methods of trying to fill it, tiny funnel, tiny funnel with a long hose, granny’s thimble, etc. The best solution I came up with was as follows. Found a piece of clear tubing approximately 1/4” I.D. (was a left over battery drain hose left over from the dark ages of ICE machines), cut an 8” long piece. I dipped it into the DOT 4 container, capped it with my finger, removed it, wiped down, stuck it through the bodywork into the reservoir and released my finger. Repeated 4 times or so until the level was at the upper line. Not sure if this will work on the other models but hope it helps.
Say10
Title: Re: Filling the rear master cylinder on the FX/FXS.
Post by: Curt on November 06, 2018, 03:55:25 PM
I recently changed my '16 FX brake fluid. Your method sounds good for topping it up, but for replacing it, a lot of fluid needs to be run through.

After considering tube/funnel hacks, I found it easiest to detach the reservoir from the frame (one screw) and pull it out from under. It stood propped up by itself. In retrospect, I probably should have temporarily taped it to the frame to reduce the chance of a spill.
Title: Re: Filling the rear master cylinder on the FX/FXS.
Post by: BrianTRice@gmail.com on February 17, 2019, 06:05:01 AM
I'm flagging this for the unofficial manual, because Zero does make this difficult with the cramped layout in this area.