lowers and air flow
Thread Starter
|
Intermediate
Joined: Feb 2006
Posts: 26
Likes: 0
From:
lowers and air flow
Do the lowers restrict or improve airflow to the heads. We do alot of xcountry travel and would like to keep them if they dont hurt the motor in desert heat. I have a sert and a real good tune which seems to help engine heat quite a bit. some input from the experts would be cool........2009, FLHTCU bought new last fall...Thanks
Road Captain
Joined: Apr 2007
Posts: 549
Likes: 1
From: Wpg, Mb, Canada
I put lowers on my Glide 8 years ago and they've never been off ( except for painting stuff ) and the motor is perfectly fine. I think if it was a real problem, HD wouldn't be putting them on at the factory.
Airflow shouldn't ever be a problem on the highway especially if you've got a good tune that typically make the bikes run richer ( or so I'm told ). YMMV.
Airflow shouldn't ever be a problem on the highway especially if you've got a good tune that typically make the bikes run richer ( or so I'm told ). YMMV.
Road Captain
Joined: Feb 2008
Posts: 559
Likes: 0
From: La Vergne, TN
Do the lowers restrict or improve airflow to the heads. We do alot of xcountry travel and would like to keep them if they dont hurt the motor in desert heat. I have a sert and a real good tune which seems to help engine heat quite a bit. some input from the experts would be cool........2009, FLHTCU bought new last fall...Thanks
I cant see how the HD lowers could not restrict the air to some degree, but I dont believe enough to hurt the motor.
Now, air flow to your feet is another story.
Cruiser
Joined: Feb 2006
Posts: 143
Likes: 0
From: New Hampshire
I always thought the vents were to let more air onto the riders legs not for the motor.
Road Captain
Joined: Feb 2010
Posts: 522
Likes: 27
From: Glendale, Arizona
They actually direct air flow toward the cyl the way they are designed. I live in the desert and wouldn't ride without them on my last two Harleys.
Trending Topics
Account Retired
Joined: Oct 2009
Posts: 3,245
Likes: 12
From: Here
I asked the Dealer when I bought my UC. He said the lowers didn't restrict air to the engine at all. in fact it is designed to put more air on the engine. They are designed to keep wind and rain off the riders legs when closed. The adjustable air wings on the bat wing fairing is designed to put more air on the rider. Dealer told me this!!!
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
Cruiser
Joined: Apr 2008
Posts: 170
Likes: 9
From: Pittsburgh, PA
As long as you get vented lowers they are ment for all season riding, ive added them and havent noticed any heat difference. The non vented lowers HD recomends removing them in temps above 75* or so IIRC And in the HD accesory book it says vents are ment to be opened in hot weather to allow more air flow over the engine and to be closed in cold and rainy weather. my 2 cents...
