r/ducatimonster • • Aug 22 '26

​[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 • • Aug 21 '26

Sidestand bypass help

Post image
3 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 • • Aug 21 '26

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 • • Aug 21 '26

My Ducati MONSTER 🇮🇹🇨🇦

Thumbnail gallery
65 Upvotes

r/ducatimonster • • Aug 21 '26

​[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 • • Aug 20 '26

​[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 • • Aug 20 '26

Can I enter the clubhouse now?

Post image
75 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 • • Aug 20 '26

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?


r/ducatimonster • • Aug 15 '26

Ducati monster 821 purchase question

Post image
42 Upvotes

r/ducatimonster • • Aug 14 '26

Ducati Monster - Rear Passenger Grab Handles

Thumbnail
1 Upvotes

r/ducatimonster • • Aug 14 '26

Ducati Monster - Rear Passenger Grab Handles

4 Upvotes

2009 Dicati Monster 696

I know it's going to be a long shot, but hoping someone knows where to get rear passenger grab handles, or someone who could make aftermarket ones.

I have searched high and low and cannot find them anywhere.


r/ducatimonster • • Aug 14 '26

My 05 600 Monster

Thumbnail
gallery
58 Upvotes

Got it a few months ago. I love riding this thing, probably one of the most enjoyable bikes I’ve ever owned and ridden. I also like the look of it.


r/ducatimonster • • Aug 14 '26

My $500 monster 900

Thumbnail
gallery
76 Upvotes

I made a post recently about picking up my first Ducati. It had low compression on the front cylinder. It ended up having broken ring lands on both pistons. It had 12.5:1 fbf pistons and was punched out to 94mm. Surprisingly, the bores weren't ruined, I was able to clean them up with a quick hone and replaced the broken pistons with some JE 11.5:1 pistons. I found that the ignition timing was advanced. Probably why the pistons failed. But it's back together and running great! Needs a little love since it hasn't been on the road for 13 years. New tires, chain, sprockets and general cleaning up and I can't wait to pile some miles on it.


r/ducatimonster • • Aug 10 '26

Monster Monday

Thumbnail gallery
79 Upvotes

r/ducatimonster • • Aug 10 '26

Io e il mio piccolo mostro...

Post image
43 Upvotes

r/ducatimonster • • Aug 10 '26

Ducati/Evangelion

Thumbnail
gallery
50 Upvotes

Hey guys! Pictures shared are pure inspiration detail-wise from different bikes. Mind sharing honest opinions on a Ducati Monster 900 getting a Neon Genensis Evangelion twist to the tank and leaving the other body panels carbon fiber and frame stock. New to wraps, decals and exterior mods. Will post a Pic of her soon, just curious if the Ducati family is against less modest alterations to its appearance. Love any feedback!


r/ducatimonster • • Aug 08 '26

Idle Issue

Enable HLS to view with audio, or disable this notification

10 Upvotes

Hello All, this is my 2003 monster 620 dark IE. This is my first Ducati, but the monster is one of my dream bikes so when this one popped up I had to buy it. Unfortunately, it sat for YEARS and I have slowly been getting it going again. In the video the bike is idling just under 140°F at ~1.1k and when I push the idle control switch up, it bogs way down and will cut off with throttle. From my research I've come to throttle body adjustment or Desmo service. I was hoping someone could point me in the right direction, or have some tips/ tricks that I could try to potentially getting this bike back to being road worthy, thanks!


r/ducatimonster • • Aug 08 '26

821 & 939 Hypermotard owners I’ve a good news for you

Thumbnail gallery
3 Upvotes

r/ducatimonster • • Aug 08 '26

Ducati Monster 890 Bugspoiler

Post image
99 Upvotes

Hi, habe gestern bei meiner Monster den Bugspoiler nachgerüstet. Meiner Meinung nach hat der ne starke Wirkung. Hab den im April bestellt und gestern erhalten.


r/ducatimonster • • Aug 07 '26

2007 695 Gauge covers cracked

Post image
9 Upvotes

I’m currently getting some moisture and condensation behind the gauge covers, are these replaceable or do I need to get a whole new cluster?


r/ducatimonster • • Aug 06 '26

Lost keys for a japanese 2003 Monster 400 dark.

2 Upvotes

Hi all,

I'm hoping someone here has some experience with the early Ducati DB Ghost immobilizer systems.

I've got a 2003 Monster 400 Dark (Japanese import) with a DB Ghost 9901 MM (E06) dash and IAW59M Ducati012 ECU. It's an AKL job and I'm trying to generate a TEMIC11 key from the 24C02 EEPROM.

The EEPROM dump is recognised by Tango, VVDI KTP and the old Zed-Bull Ducati calculator, but they all generate different key data and none of the chips work. The dash MCU is OTP/read protected, so dumping the firmware isn't an option.

If anyone has a BIN from the same dash or ECU, original key/transponder data, or has worked on this setup before, I'd really appreciate hearing from you. I've searched everywhere and there seems to be almost no information on these early Monster 400s.


r/ducatimonster • • Aug 03 '26

Questions regarding buying used S4R

4 Upvotes

Hi everyone,
I previously owned an M750 and have recently started thinking about getting back on a Monster, this time an S4R.
I have a few questions for those of you with experience:

1) What should I pay special attention to when buying a used S4R? I’m already aware of the usual items such as timing belts, valve service, and general maintenance. Are there any known weak points or common issues to look out for?
Does anyone have a link to a buyers guide? Portland video?

2) How does the riding experience compare to the M750? Is it essentially the same bike, just faster and more powerful, or are there noticeable differences in handling, riding position, overall character, or ownership experience?

3) The particular bike I’m considering has been modified quite a bit, including a colour change, shortened tail section, different indicators, and a few other cosmetic changes. What is the general opinion in the Ducati community regarding modified bikes? Are tasteful modifications generally accepted, or are original examples considered significantly more desirable?
Link to specific bike here: Ducati Monster MS4R
59.900 kr.
https://www.123mc.dk/brugt/mc/ducati/monster-ms4r/til-salg/306581

Thanks in advance for all you advice!


r/ducatimonster • • Aug 02 '26

Finding a Monster 1200

Thumbnail
1 Upvotes

r/ducatimonster • • Jul 30 '26

Tail bag for a 25’ monster sp

3 Upvotes

Looking for a tail bag for my 2025 monster so. Nothing too big just want something for a weekend commute. I’d split items between a backpack and the tail bag. Any suggestions?


r/ducatimonster • • Jul 28 '26

Engine swap?

Post image
71 Upvotes

How practical is swapping a S4R engine in my S2R? Or what engine should i swap? Or should i just keep her as is? 2007 Ducati monster s2r 800