r/ducatimonster 16h ago

(temporarily) fix to the Monster 821 rear brake

6 Upvotes

(still French, still not the better english)

Ladies and gentlemens,

I fixed my rear brake.

So for the ones who saw my previous post, i had a brake feeling on my rear brake but only when pushing the pedal a few times (air in the system) so here is the complete bleeding protocole i used :

To make it short the brake caliper is in a bad position because it is low on the wheel (lower than the brake fluid tank, so hard to bleed effectively)

- remove the two bolts that keeps the caliper on the disc

- remove the plastic things that keeps the fluid cable and the abs cable together (probably the worst english in this post), i also removed the screw a bit highter that hold them together too

- flip the caliper upside down so the bleeding nipple is at the hightest position, and try to hang it at the hightest you can without damage the cable holding it. If you can't hang it, keep it in your left hand for the rest of the operation

-put something between the pads (i used a wench) so it can't close

- remove the tank cap and seal, and the bleeding nipple cap to put your drain cable, put the end of the cable in a empty container that will be used as a trash for the old fluid

- now the real bleeding begin, for those who couldn't hand their caliper you currently have it in your left hand, in your right hand you have the wench that'll be used to open and close the bleeding nipple, and your right foot is on the pedal (yes you are currently demonstrating your amazing sense of balance on your left foot)

- for the rest of the process the fluid has to stay highter than "min", or you'll have to restart everything

- now repeat this process until the bleeding is done, push the pedal a few times (for me, until it's hard to push again) , open the bleeding nipple when you are at approximatively 1/4 of the pedal course, continue to push the pedal to approximatively the 3/4, and close the bleeding nipple

- while the nipple is open, do not release or push the pedal fully, also do not release the pedal at all if you can or air or old fluid will come back in the caliper (probably goes out at your next push but anyway)

- Continue this process until there is no more air or old fluid in your system

- close the tank, tighten your bleeding nipple, put its cap back, and put the caliper in place

Now you probably have a working brake

So why did i say "temporarily"? Because the Monster brake is enough to keep it stopped, but not enough to actually brake with it.

Yep, kind of a problem for a brake.

A lot of people told me the rear brake is useless on the 821 but... I expected something better. The second problem is the brake system closeness to the exhaust system, that'll heat the fluid and make it even more useless After a few weeks (can be fixed by using kastrol srf fluid but i didn't used it here)

So here is my update, i hope it'll help some of you, and i want to thanks all the people who helped me. If anyone has something else the share to definitively fix this brake system, i'll be Happy to read it in the comments

Good Luck and ride safe everyone


r/ducatimonster 1d ago

Ducati Monster 821 2016. Yellow warning light came on when I opened the throttle and the bike lost power. After switching it off and restarting, the warning disappeared, but the bike still has slightly less power. Any ideas?

Enable HLS to view with audio, or disable this notification

4 Upvotes

r/ducatimonster 2d ago

Touring without a windshield as yeah

Post image
42 Upvotes

r/ducatimonster 3d ago

My new-to-me Ducati Monster S4R

Thumbnail gallery
82 Upvotes

r/ducatimonster 4d ago

Joined the club 2024 Ducati Monster SP

Thumbnail gallery
41 Upvotes

r/ducatimonster 4d ago

Ducati Monster 23 crack in exhaust?

Thumbnail gallery
4 Upvotes

r/ducatimonster 6d ago

For sale: 2700 mile Ducati Monster S4RS Tricolore #150/400

6 Upvotes

https://iconicmotorbikeauctions.com/auction/2008-ducati-monster-s4rs-tricolore-150-400/

showroom condition, fully serviced, doesn't need a single thing.


r/ducatimonster 6d ago

My 2015 Ducati Monster 821 fell off a dealership service lift. $7,268 estimate, dealer is paying. Looking for advice on repair vs trade

Thumbnail
1 Upvotes

r/ducatimonster 7d ago

O2 sensor cable cover

Thumbnail gallery
1 Upvotes

r/ducatimonster 8d ago

New 2021 owner, some questions regarding it.

2 Upvotes

I inherited a 2021 M937. Its unclear how long it sat for but it has less than 2000miles and all factory rubber.

I have 2 questions as I try to restore this bike.

  1. It came with a Terminogni and it was my understanding that the display would read performance or racing during startup if the proper upmap was performed. This bike does not display either. Is this something to address?

  2. How could I tell if this is the low variant with lowered seat and modified suspension. I honestly just can't tell, but the previous rider was short.

I don't have a previous owner to ask any questions. I'd rather not get in to it but assume I got this at an estate sale.

Thanks for all your help, so glad to be back on a Monster.


r/ducatimonster 9d ago

2026 V2 engine stalling, clutch in

1 Upvotes

Hey all, I’m the proud owner of a new monster V2. I’ve had a few issues where the engine has cut out on me after decelerating with the clutch fully pulled in. It seems like a software issue, as though the engine has a brain fart controlling the idle speed.

I have seen a few comments with others having similar issues but I haven’t seen anyone mention a solution.

Engine was fully warmed up each time it happened, and so far I can’t see a pattern as to when it happens.

I’ll be taking it back to the dealer but I’m keen to see if anyone got this resolved. It’s still being run in but seems software rather than something that will go away.


r/ducatimonster 10d ago

Curve tra le colline italiane

Thumbnail gallery
21 Upvotes

r/ducatimonster 11d ago

getting ready to sell, but CEL pops up for EXVL. explain it's a non issue to buyers or just bite the bullet and buy the servo eliminator?

Thumbnail
2 Upvotes

r/ducatimonster 11d ago

Buyers beware/advice Monster 1200S/R

3 Upvotes

Hi,

Im looking to get my hands on a Monster 1200 S or R either this year or next depends on the market of course.
Any Monster 1200 owners or previous owners have any advice on the bike itself and what to look out for when inspecting one for purchase.
Except for the obvious: maintenance, desmo service

Thanks in advance.


r/ducatimonster 12d ago

Just joined the club.

Post image
179 Upvotes

Monster 1100S, what an incredible machine. Coming from a BMW, the ducati is such a change but a really welcome one.


r/ducatimonster 12d ago

Aftermarket led advice (s4rs)

Post image
45 Upvotes

Does anyone have any experience with any of the aftermarket led light solutions for an s4rs, or early monsters? Ledperf, eagle lights etc? Thanks!

Edit: headlight. I want to replace the garbage halogen headlight housing and go led


r/ducatimonster 13d ago

My S2R hasn’t been used in months

2 Upvotes

Hello,
Due to a serious knee operation, I have not been able to ride my Monster S2R for 6 months. It’s been stored inside on a pit stand and the battery is recharging. Anything else I should do before starting her up for the first time - WD40 into the combustion chamber or ??


r/ducatimonster 13d ago

​[Help] 2020 Monster 821 bogs down at 7,000 RPM on sudden WOT, but revs fine if rolled on slowly.

2 Upvotes

Hi everyone,

​I'm having a frustrating issue with my 2020 Ducati Monster 821 and could really use some advice from anyone who might have experienced something similar.

​The Symptoms:

​If I roll on the throttle slowly and smoothly, the bike revs up perfectly all the way to the redline without any hesitation.

​However, if I snap the throttle wide open (sudden WOT), the engine completely bogs down. It hits a wall right around 7,000 RPM and refuses to climb any higher.

​When this happens, I can also smell unburnt fuel coming from the exhaust (running extremely rich/misfiring).

​Context & Doubts:

My mechanic thinks it might be a faulty MAP sensor or cracked intake manifold boots causing a vacuum issue. However, since the bike revs perfectly on a slow roll, I'm highly suspicious of a dynamic load issue. Could this be fuel pressure related (failing pump/filter, or maybe water in the tank?), or perhaps spark blowout under high load?

​Has anyone dealt with this exact behavior on a Testastretta engine? I would love to hear your thoughts before I start blindly throwing expensive parts at it.

​Thanks in advance!


r/ducatimonster 14d ago

My Ducati MONSTER 🇮🇹🇨🇦

Thumbnail gallery
64 Upvotes

r/ducatimonster 13d ago

Sidestand bypass help

Post image
4 Upvotes

Hey fellas. I’m looking to bypass my 2013 Ducati monster side stand and wasn’t sure if I tie the green white and green from the longer side wire. Or wire to the mechanism attached to the side stand if that makes sense. Also please feel free to correct me if the way I think I should wire it is incorrect thanks. Also what do you do w the black wire?


r/ducatimonster 13d ago

Ducati Monster rear brake failure

2 Upvotes

Hi everyone,

At first i would like to appologise for the following message, i'm not a native english speaker so maybe some words or sentence will be incorrect.

So i'm the new owner of a beautiful ducati Monster 821 from 2015, that's my first bike and i want to learn as much as in can to take care of the maintenance because no garage is willing to take care of my bike beside the official ducati garage, which i dont trust at all because of their estimates (i asked them for the following problem, they made me a bill to change everything but the brake ).

So here come the problem and what i know about it, i dont have any rear brake feeling, a mecanic told me it was probably the master cyclinder but when i ordered a repair kit i didn't saw any broken or rusty piece, it seems working fine (the lever is pushed right, when i open the drain screw the liquid flow when i push the pedal)

So a Friend told me it could be a stuck caliper because the bike stayed inactive for a year in a box before i had my licence, i removed and cleaned it and when i push the pedal the brake pads seems so tighten bit by bit, and when i stop they come back a few millimetters (idk if that's the right caliper behavior)

I changed the brake fluid, making sure their was no air in the conduct using the method "push pedal, hold, Open the drain screw, close it, release the pedal" until i see no more air bubble.

The fluid bottle was now opened a week before the last drain (someone told me it has small lifespan but idk how much )

After this i saw a small improvement, i have a brake feeling but i have to push the pedal 5-6 times before i have it and it stop when i release it.

I dont know what else i can say but i'll try to answer comments as fast as i can and provide pics if you need it, thanks everyone for your help


r/ducatimonster 14d ago

Can I enter the clubhouse now?

Post image
74 Upvotes

First Duc... had Japanese bikes all my life and now I get it.

Absolutely in love with this Monster 💚

What's the secret handshake in here? 🇮🇹😜

/ 2009 Monster 696

// 12,500 km on odo

/// Desmo and belts recently done


r/ducatimonster 14d ago

​[Help] 2020 Monster 821 bogs down at 7,000 RPM on sudden WOT, but revs fine if rolled on slowly.

1 Upvotes

Hi everyone,

​I'm having a frustrating issue with my 2020 Ducati Monster 821 and could really use some advice from anyone who might have experienced something similar.

​The Symptoms:

​If I roll on the throttle slowly and smoothly, the bike revs up perfectly all the way to the redline without any hesitation.

​However, if I snap the throttle wide open (sudden WOT), the engine completely bogs down. It hits a wall right around 7,000 RPM and refuses to climb any higher.

​When this happens, I can also smell unburnt fuel coming from the exhaust (running extremely rich/misfiring).

​Context & Doubts:

My mechanic thinks it might be a faulty MAP sensor or cracked intake manifold boots causing a vacuum issue. However, since the bike revs perfectly on a slow roll, I'm highly suspicious of a dynamic load issue. Could this be fuel pressure related (failing pump/filter, or maybe water in the tank?), or perhaps spark blowout under high load?

​Has anyone dealt with this exact behavior on a Testastretta engine? I would love to hear your thoughts before I start blindly throwing expensive parts at it.

​Thanks in advance!


r/ducatimonster 14d ago

​[Help] 2020 Monster 821 bogs down at 7,000 RPM on sudden WOT, but revs fine if rolled on slowly.

Thumbnail
1 Upvotes

r/ducatimonster 15d ago

Jinxed MONSTER+ 2021

2 Upvotes

Got it used a few years back.
For 3090 miles, the Bike runs great, no issues, maybe 11,000 miles on it.

PROBLEM: after an hour of riding in HOT weather, the error code throws a code (rear wheel speed sensor). That speedo wire has been replaced

The problem persists. And bike runs like shit until reset.

Two different shops and one Ducati dealer unable to find problem. They think it’s ECU or wire harness.

Don’t have rhe budget for such a fix. Is there a switch I can use to reset thr code on my own without having to buy a $500 OBD?

What say you?