Varaible displacement
Grand HDF Member
Joined: Jun 2017
Posts: 4,666
Likes: 3,964
From: Near Yosemite
Club Member
Joined: Apr 2016
Posts: 11,534
Likes: 8,369
From: Inland NW
It's been on the big twins since '07 I believe? The first time the 110 in my FXDLS dropped a cylinder at idle, I thought I had lost a piston. I had no idea the bike even had the feature LOL.
I turned it on one time on my cammed 128 in the SG, and man it is rough! My engine lopes so hard at an idle as it is.
I have always just left it off, not interested in whatever feature they claim it has, the harsh idle bugs me more.
I turned it on one time on my cammed 128 in the SG, and man it is rough! My engine lopes so hard at an idle as it is.
I have always just left it off, not interested in whatever feature they claim it has, the harsh idle bugs me more.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,893
Likes: 8,001
From: poway
My FXDX is variable displacement.. When the rod broke it went from 116 ci to 58 real fast. A few reves later it went to 0 when the motor locked up..
Seasoned HDF Member
Joined: Nov 2016
Posts: 7,697
Likes: 13,940
From: Northern New Jersey
Comfortable
.. Im from an era when men were men and mothers were tougher.
Common sense how can it be good to have an un-equal intentional load difference on the crank? Now one cylinder (wrist pin, barring s, crank, heck even piston skirt and rings) has twice the centrifugal weight to carry when running alone. Why dont we start installing wind sails while were at it. Maybe a toilet seat for the passenger.. They are motorcycles. Leave them manly and raw.
Common sense how can it be good to have an un-equal intentional load difference on the crank? Now one cylinder (wrist pin, barring s, crank, heck even piston skirt and rings) has twice the centrifugal weight to carry when running alone. Why dont we start installing wind sails while were at it. Maybe a toilet seat for the passenger.. They are motorcycles. Leave them manly and raw.
I give them credit for maintaining the air cooled V twin architecture for as long as they have.
Seasoned HDF Member
Joined: Jan 2007
Posts: 20,616
Likes: 4,440
From: anacoco, la
twisting the throttle forward is also one way to disengage your cruise control.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Tourer
Joined: Sep 2017
Posts: 459
Likes: 405
From: Albuquerque New Mexico
Grand HDF Member
Joined: Aug 2020
Posts: 4,798
Likes: 5,889
From: Knoxville
NO
He never mentioned EITMS, hes talking about variable displacement which if HD had, one cylinder would not fire while rolling down the highway. Amazing how easy information is to find these days and folks are still confused.
As an example of variable displacement, my V-8 becomes a V-4 at highway speeds.
EITMS shuts down one of the two cylinders while idling for air cooled V-twin. Both cylinders fire while rolling down the highway.
As an example of variable displacement, my V-8 becomes a V-4 at highway speeds.
EITMS shuts down one of the two cylinders while idling for air cooled V-twin. Both cylinders fire while rolling down the highway.
