What fell off my Scrambler? - Page 2 - Triumph Forum: Triumph Rat Motorcycle Forums
Air Cooled Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, Bobber, T100, Speedmaster, America, Thruxton, and Scrambler.

Sponsored by: Triumph Twin Power Ltd

LinkBack Thread Tools Display Modes
post #11 of 12 (permalink) Old 12-01-2012, 03:48 AM Thread Starter
Grand Prix 500
Main Motorcycle: 2012 Scrambler
Senior Member
tvscum's Avatar
Join Date: Dec 2011
Location: San Diego
Posts: 143
Other Motorcycle: 1997 Honda XR400
Yes, I removed the Arrow baffle. It can be quite a bitch to pull out, especially the first time. You have to remove the end clip first. I ended up putting it back in because it was too loud. I am going to replace it with this baffle as soon as it arrives in the mail:


The AI and the O2 systems are completely different systems. The AI can be removed without remapping. I removed the O2 sensors because I am installing a performance tune map that requires the O2s to be removed:

I am installing Tune #2 here:

The AI removal helps with eliminating he popping on decel. The O2 removal helps with eliminating throttle snatchiness.

Current: 2012 Scrambler, Bitubo forks, YSS shocks, Arrow 2-to-1, 33mm DB killer, TTP tune #4, Breathe, DNA filter; O2, AI, Airbox baffle, EVAP removed, Up-N-Over, Pivot Pegs, Ventura rack.

Past: '83 Honda XR500; '84 Honda XL600; '86 Yamaha XT350

Last edited by tvscum; 12-01-2012 at 04:03 AM. Reason: added last line
tvscum is offline  
Sponsored Links
post #12 of 12 (permalink) Old 12-01-2012, 01:01 PM
Main Motorcycle: 2010 Triumph Scrambler
Senior Member
Join Date: Oct 2010
Location: San Jose, CA
Posts: 290
Yep, the performance tuning on the flat maps is done without the aid of the O2S. As soon as you exceed 50% load (MAP) or 70% throttle (TPS), the ECU goes into open-loop. The open loop operation ignores the O2S, and uses flat maps.

The O2S, in this sense, is only really checked when cruising, deceleration, or low throttle usage. The stock maps are poorly tuned enough once you start making changes, the throttle response gets really snatchy, and the low throttle usage performance is quite... Unimpressive. This, too, could be tuned, but it very fiddly and the O2S response sampling is slow enough that it's not going to react fast enough to facilitate smooth throttle response.

With regard to Cali emissions things, if they start integrating them in they'll either start at a) just ECU checks (I'll pass, no sensors to make me fail!) or they'll have a grandfather clause. Think about how many Harley owners (and there are a LOT out here!) would be up ****'s creek without a paddle if they don't do anything like that. =)

Overall, legislation is focused on other issues right now, since the last push for motorcycle regs didn't really go anywhere. And 'doing it right' is a reasonable risk in my eyes. But these are all just my considerations. =)
casida is offline  
Sponsored Links

Quick Reply
All posts must adhere to Forum Rules

Register Now

In order to be able to post messages on the Triumph Forum: Triumph Rat Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter your valid email address, that can receive an automated confirmation message. Otherwise, you won't be able to gain full access.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
07 TBA Fell Over....Looking for TIPS BCTriumph Air Cooled Twins Technical Talk 12 12-07-2012 12:32 AM
What fell out of my Scrambler headlight? tvscum Air Cooled Twins Technical Talk 2 08-24-2012 11:56 PM
Ouch I fell down... yakoo11 Triumph SuperSports 14 10-27-2009 02:32 AM
Bike fell over!!!! Duality Street Triple Forum 0 04-01-2009 02:09 PM
Damn! She fell over.......! dubvmv Sprint Forum 13 08-03-2008 11:55 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

For the best viewing experience please update your browser to Google Chrome