Ducati Hyperstrada Forums Ducati Hyperstrada Motorcycle

Go Back   Ducati Hyperstrada Forum > Ducati Hyperstrada Forum > Ducati Hyperstrada

Ducati Hyperstrada Ducati Hyperstrada Motorcycle Forum: 2013-2015 Hyperstrada and 2016-2017 Hyperstrada 939


Reply
 
LinkBack Thread Tools Display Modes
Old April 6th, 2018, 01:46 AM   #1
Member
 
Hyperstrada66's Avatar
 
Joined: Aug 2017
From: Cheshire
Posts: 34

De-cat

Iíve removed the cat out of my standard exhaust using a drill hammer and chisel and some long pliers the power gain is good and well worth doing


Sent from my iPad using Tapatalk
Hyperstrada66 is online now   Reply With Quote
 
Old April 6th, 2018, 06:08 AM   #2
Senior Member
 
monocog007's Avatar
 
Joined: Oct 2015
From: Minnesota
Posts: 508

I Ride: 13' Hyperstrada, 00' M900Sie
How's the noise? Any difference?
monocog007 is offline   Reply With Quote
Old April 6th, 2018, 06:30 AM   #3
Member
 
Hyperstrada66's Avatar
 
Joined: Aug 2017
From: Cheshire
Posts: 34

Quote:
Originally Posted by monocog007 View Post
How's the noise? Any difference?


I would say almost the same perhaps a little bit deeper but not much


Sent from my iPhone using Tapatalk
Hyperstrada66 is online now   Reply With Quote
Old April 8th, 2018, 11:22 AM   #4
Member
 
Joined: Sep 2017
From: Lansing Mi
Posts: 78

I Ride: 2013 hypermotard/hyperstrada, 2005 zx6r, drz125, crf50 crf70
Was it one worth the effort? Did you keep the exhaust flapper valve?
Araitim is offline   Reply With Quote
Old April 8th, 2018, 11:36 AM   #5
Member
 
Hyperstrada66's Avatar
 
Joined: Aug 2017
From: Cheshire
Posts: 34

Quote:
Originally Posted by Araitim View Post
Was it one worth the effort? Did you keep the exhaust flapper valve?


Well worth the effort and still running the flapper


Sent from my iPad using Tapatalk
Hyperstrada66 is online now   Reply With Quote
Old April 16th, 2018, 01:57 PM   #6
Senior Member
 
Joined: Jun 2014
From: Boston
Posts: 753

Hard to see how power is better with the lack of back pressure. Without a remap you're mistaking sound for power.
appliance821 is offline   Reply With Quote
Old April 16th, 2018, 11:37 PM   #7
Senior Member
 
gatdammit's Avatar
 
Joined: Mar 2013
From: Naples, IT
Posts: 1,901

I Ride: 2013 White Strada
Back pressure. I learned this lesson the hard way as a kid when I straight piped my GTI.
gatdammit is offline   Reply With Quote
Old April 17th, 2018, 05:22 AM   #8
RSL
Senior Member
 
RSL's Avatar
 
Joined: May 2015
From: Dallas, Texas
Posts: 838

I Ride: 2013 Hyperstrada
I don't follow bikes without a catalytic converter because of the dirty exhaust. Stinks and irritates. Toxic really.
RSL is offline   Reply With Quote
Old April 17th, 2018, 09:19 AM   #9
Member
 
Hyperstrada66's Avatar
 
Joined: Aug 2017
From: Cheshire
Posts: 34

Quote:
Originally Posted by appliance821 View Post
Hard to see how power is better with the lack of back pressure. Without a remap you're mistaking sound for power.


Do you know this for fact or just guessing the noise levels havenít changed!


Sent from my iPad using Tapatalk
Hyperstrada66 is online now   Reply With Quote
Old April 17th, 2018, 05:39 PM   #10
Senior Member
 
Joined: Jun 2014
From: Boston
Posts: 753

Quote:
Originally Posted by Hyperstrada66 View Post
Do you know this for fact or just guessing the noise levels havenít changed!


Sent from my iPad using Tapatalk
Not sure what you mean - pretty sure it's louder.

The main point is that exhausts are tuned so the the pressure wave resonates in a specific way. This bike generates the most power somewhere in the 5 - 8 k range - that's where your most efficient scavenging was happening. Where your power is being generated now is unknown.

Also - as RSL mentioned - you ain't doing anyone riding behind you any favors.
appliance821 is offline   Reply With Quote
Reply

  Ducati Hyperstrada Forum > Ducati Hyperstrada Forum > Ducati Hyperstrada

Tags
decat



Thread Tools
Display Modes



Ducati Hyperstrada Facebook Ducati Hyperstrada Twitter Ducati Hyperstrada RSS Feed



Ducati Hyperstrada Motorcycle Forum
Copyright © 2012-2014 HYPERSTRADA.COM • All rights reserved.