2019 Series 2 rear brake caliper mystery.

[Aussie19Busa]

Hey Guys, hoping you can help.
I just pulled and refitted my rear wheel to allie a repaint. I removed the caliber hanger etc in the process to clean. I was fastidious in laying parts out as they came off ( or so I thought). During the reinstall I found a little red spring that I’m hoping is from another project or something random. I have noticed a little knock from the Caliper mount as I apply the rear brake while it’s still on the stand. I’m thinking the spring may be designed to stop the “slap” as I apply the rear brake but even after finding the spring I could not locate where it belongs.
I have attached a couple of pictures of the spring with the last giving an idea of the actual size.
Any help would be appreciated.

Brett
Wollongong
Australia

[Berlin Germany]

as far as i remember no rear caliper has such a spring (just like the front) neither gen 1 nor 2 .
so i guess it is from somewhere else

lill hint aside - clean all the bottom of your work area before you start a new project.

i clean my bike bench everytime with a broom when a bike is ready and goes finally off the bench.

[Hayabusa Wannabe]

@Berlin Germany do you have an opinion on the problem the brake is experiencing?

[Berlin Germany]

@Hayabusa Wannabe

sorry i don´t understand your question.

but for understanding what pieces the gen2 rear caliper has see the pic below

there is def. no spring like shown from @Aussie19Busa

and i guess he has no manual for his gen2

and sorry dear australian never fumble around at the brakes without the associated manual.

no matter what bike / car / truck or else you wanna fix !

[Hayabusa Wannabe]

I have noticed a little knock from the Caliper mount as I apply the rear brake while it’s still on the stand.

bump

[Bumblebee]

bump

Without actually being there listening and actually feeling the rear brake when it does this, it's a hard thing to diagnose..

These are floating brakes so there is always a little thump if you grab the brake like that...if it is heard out on the street under regular use, I'd be more concerned...

[dave s]

Rear caliper mount slots into swing arm so that is probably the slight Knock , check it on the road and report back

[HayaWakened]

ABS activating cuz bike's on a stand??

[Aussie19Busa]

Rear caliper mount slots into swing arm so that is probably the slight Knock , check it on the road and report back

All good. After an extended ride I am unable to hear any knocking noise whatsoever so it would appear I have a spare part without a home

thx for the help.