Advice Needed concerning Decatting
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Cruiser
Joined: Oct 2008
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From: Indiana
Advice Needed concerning Decatting
I have a 2016 Ultra Limited with Vance and Hines Monster Rounds slip-ons with stock air filter. I am experiencing that dreaded heat on the right side and would like to remove the cat. Will I have to do anything else? I'm concerned that the pipes may discolor or it may run to rich. Thanks!
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
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From: Phoenix '53, '88, '09 Big Twins
you will likely run lean due to the increased air flow through the motor ( the 2014+ air cleaner flows more than the previous air cleaners).
so look into tuning compensation
it'll also be noisier
and you will pick up 7 to 10 horsepower
and it'll be hot, sitting on a motor is hot. the best defense is thick boots and jeans- if you keep your thighs to the tanks you will get better flow of the hot air past your legs.
about 105ş here today
mike
so look into tuning compensation
it'll also be noisier
and you will pick up 7 to 10 horsepower
and it'll be hot, sitting on a motor is hot. the best defense is thick boots and jeans- if you keep your thighs to the tanks you will get better flow of the hot air past your legs.
about 105ş here today
mike
Last edited by mkguitar; Sep 1, 2016 at 04:37 PM.
Road Warrior
Joined: Aug 2014
Posts: 1,937
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From: Vancouver, WA
I have a 2016 Ultra Limited with Vance and Hines Monster Rounds slip-ons with stock air filter. I am experiencing that dreaded heat on the right side and would like to remove the cat. Will I have to do anything else? I'm concerned that the pipes may discolor or it may run to rich. Thanks!
Club Member
Joined: Sep 2014
Posts: 7,618
Likes: 10,437
From: Des moines IA
The bike will not run any leaner without the cat. As a matter of fact, it will probably run a little richer without the cat. The O2 sensors will detect the higher flow, read it like a lean condition and richen the fuel. The ECM will compensate for the increase in air flow. They are not like a carburetor. Until you get outside of the ECM limits you are good.
Not that doing a tuner wouldn't increase the overall performance. A tuner will help not only help a modified bike, but will help even a bone stock one.
Not that doing a tuner wouldn't increase the overall performance. A tuner will help not only help a modified bike, but will help even a bone stock one.
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Ultimate HDF Member
Joined: Jun 2010
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From: OH, USA
If the heat from the cat don't discolor your shields. Gutting it will reduce the chance. Mine is decatted. No issues except my leg is cooler. I have a FP3 on mine. I had it in when the bike was bone stock. And yes. It will likely run richer. Not leaner as was said.
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Road Warrior
Joined: Feb 2016
Posts: 1,354
Likes: 399
From: Vancouver, BC
I've a '15 Ltd with a decat stock header (did it because of the heat) and those Monster Rounds. Also did the FP3 and I will say to me it made the most difference (maybe you don't "need" it but...).
So my observations were that the heat felt on the right leg was not reduced as much as I thought it would be by decating the header (I think the richer tune from the FP3 may have made a more noticeable change in reducing heat actually). The other thing I noticed was that the combo of the decat and those slip-ons was just too loud for long tour days (does sound nice though). I ended up putting Hard Kore Quiet Baffles on and these things REALLY made a big difference in noise levels at idle and cruise (still a nice bark when under throttle though). So not sure what you will think of the noise levels after doing the header decat and those V&H Monster Rounds but if you also find them too loud this is a good solution (or was for me anyway).
So my observations were that the heat felt on the right leg was not reduced as much as I thought it would be by decating the header (I think the richer tune from the FP3 may have made a more noticeable change in reducing heat actually). The other thing I noticed was that the combo of the decat and those slip-ons was just too loud for long tour days (does sound nice though). I ended up putting Hard Kore Quiet Baffles on and these things REALLY made a big difference in noise levels at idle and cruise (still a nice bark when under throttle though). So not sure what you will think of the noise levels after doing the header decat and those V&H Monster Rounds but if you also find them too loud this is a good solution (or was for me anyway).
Last edited by hamah; Sep 1, 2016 at 11:32 PM.
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