I'm pretty sure I've seen Youtube videos of this in case you haven't seen/heard them yet.

 

I can speak from experience it's THE best thing you can do to your FT. I was freaking out about having to tune/remap and then spoke unofficially to some Duc mechanics who said just go for it. Took 30min to swap out and its like I'm riding a whole new bike!

 

To answer your questions yes it does run rich without the CAT, but RPM is fine and now there's lots of pops and bangs using the quick shifter up and down. Ride noise is not offensive with the db killer still in place.

 

Thanks for your input, I am glad to hear that "its like I'm riding a whole new bike".
In Japan, it's getting harder to modify motor bike. I will try to consult with my bike shop, but if they refuse to do that, I will try to do that by myself.

 

I asked my bike shop to deploy "CAT eliminalor" but they refused to do that. And also they strongly recommended that I should not do that by myself also, because the heat of the engine would be rise and the engine won't work well (like a overheating) and also I can not get the warranty from DUCATI.
These days in Japan, the restriction about modifying motor bike is getting strict. Most of bike shops refuse modifying motor bikes. I think I should follow the trend of the times.

 

Depends what's legal in Japan, though understanding the modification culture over there, I imagine aftermarket exhausts are not to difficult to get approved or fitted?

Fitting a decat exhaust obviously has some downsides when it comes to emissions. You will be emitting more carbon monoxide. If that bothers you, is a debate only you yourself (and the local laws) can answer. Here in the UK, removing the cat on a motorcycle in the after market is perfectly legal as long as the exhaust is type approved. The number of miles I cover a year by motorcycle compared to other greenhouse emitting activities, like heating my home and driving my car, I believe to be negligible but there are fair arguments both ways.

The standard tuning and exhaust note of the Scrambler is sub-par from factory. Changing the exhaust and getting a suitable remap done REALLY brings the bike to life. Benefits are numerous.
I would never recommend dramatically changing the exhaust on a naturally aspirated engine, without altering the ECU fuel maps to match. Many say the bike runs fine without but it's kind of missing the point and wasting the potential benefits, to save a little bit of money. The exhaust saves the weight, looks better and sounds better but the other benefits require a good ECU map or Power Commander piggy back.

Benefits of decat (or less restrictive cat) exhaust + ECU remap:

• Better throttle response
• Better sound
• Significant weight loss
• Less heat from the hot cat & exhaust
• Cooler running engine
• Smoother engine at low RPM (below 4000rpm)
• Stronger torque at higher RPM
• Better fuel economy

I looked a little into the exhaust modification laws in Japan. They do seem strict. +5db over factory sound rating is tight but since decibels isn't a linear scale, you could make a fair bit more noise without breaking the rules. Your best bet would be finding an exhaust that comes with a resonator, they make it a bit quieter than the majority of just straight pipes. Also don't modify the manifold/header pipes from the engine, as I've found that contributes quite a lot to making more noise.

MIVV do an exhaust with a resonator: Mivv exhaust X-M1 approved black steel Ducati Scrambler 800 Icon 2021-2022 | eBay UK
The factory option Termignoni "Race" exhaust does too but that is sold as not approved for road use, so could be problematic.
Termignoni Exhaust Ducati Scrambler 800 Low Titanium Silencer - Race Use | Conquest Racing Ltd

Both with the baffles in, would stand a decent chance of fitting within noise laws. If Ducati fit the race exhaust, it will also come with a factory remap to suit but you pay a lot for that setup.

 

Thanks for detailed comments.
Actually, what I would like to do is changing exhaust sound louder like a racing machine, so I don't want legal level sound.
In Japan, these days, they treat only regal muffler, but that isn't what I want.
Before there were some shops to do that, but now, there are a few.
My bike shop, they never do illegal modification.
So, I decided to ride my motor bike as it is.
Masaharu

 

good news is, you can do a lot yourself quite easily!

 

Hola, he puesto en mii ducati scrambler full trother de 2024 el descatalizador de leovinci. Y el sonido es tremendo. No he tocado la ecu. Por lo que si noto pedrida en bajos y muchos petardos. METROe gustaría poner una emu plug and play para cuando tenga que ir al concesionario. Poder retirarlo todo y poder seguir respetando la garantía.