Harley Davidson Forums

EVO All Evo Model Discussion

running rich... CV Carb

Thread Tools
 
Search this Thread
 
Old Jun 5, 2018 | 07:31 PM
Share
  #1  
elmo4fun's Avatar
elmo4fun
Thread Starter
|
Advanced
Joined: Apr 2014
Posts: 81
Likes: 5
From: upstate NY
Default running rich... CV Carb
does anyone have pics to show me how to make my CV carb run leaner? im running way too rich right now. im told there is not an air screw but instead a fuel screw that has to be adjusted. bike runs awesome above 600 RPM. below that it spits and sputters and backfires. took the plugs out. they were dark black but not wet. any help would be appreciated.
 
Reply
0
Old Jun 5, 2018 | 09:46 PM
Share
  #2  
Mattbastard's Avatar
Mattbastard
Grand HDF Member
Veteran: Air Force
15 Year Member
Liked
Top Answer: 3
Joined: Nov 2009
Posts: 4,315
Likes: 1,663
From: Tampa
Default
You really love your potato-potato don't ya?
 
Reply
0
Old Jun 5, 2018 | 10:22 PM
Share
  #3  
0maha's Avatar
0maha
Seasoned HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2012
Posts: 6,555
Likes: 4,805
From: Omaha
Default
Go to the CV Performance web site. They've got videos and various instruction sets that cover all of it pretty well.
 
Reply
1
Old Jun 6, 2018 | 03:35 AM
Share
  #4  
Kingglide549's Avatar
Kingglide549
Banned
Joined: May 2018
Posts: 4,576
Likes: 978
From: Viet Vet, crossroads
Default
How rich are ya and how do you know?
Where are you rich,? low, mid, or WOT?
Cold or hot?
Check the float level is mandatory
 
Last edited by Kingglide549; Jun 6, 2018 at 03:37 AM.
Reply
0
Old Jun 6, 2018 | 06:38 AM
Share
  #5  
elmo4fun's Avatar
elmo4fun
Thread Starter
|
Advanced
Joined: Apr 2014
Posts: 81
Likes: 5
From: upstate NY
Default
decel pop. black plugs, super sooty exhaust. runs rough off of idol, once above about 600-800 RPM runs great other than decel pop. the exhaust smells rich
 
Reply
0
Old Jun 6, 2018 | 06:44 AM
Share
  #6  
0maha's Avatar
0maha
Seasoned HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2012
Posts: 6,555
Likes: 4,805
From: Omaha
Default
Did it run well previously? Did you change anything, or did it just start acting up on its own?

Give your exhaust headers a good look. An exhaust leak can cause this.
 
Reply
0
Old Jun 6, 2018 | 06:56 AM
Share
  #7  
elmo4fun's Avatar
elmo4fun
Thread Starter
|
Advanced
Joined: Apr 2014
Posts: 81
Likes: 5
From: upstate NY
Default
plugs looked good until i put new head gaskets in. im fairly confident it was sucking air before i did that. im finding the previous owner wasnt the brightest with some things and my guess is he adjusted it (the carb) to compensate when it was. now that its sealed up properly, its in a rich condition. and yes i changed the exhaust gaskets when i did the head job. lol
 
Last edited by elmo4fun; Jun 6, 2018 at 06:59 AM.
Reply
0

Trending Topics

Old Jun 6, 2018 | 07:38 AM
Share
  #8  
0maha's Avatar
0maha
Seasoned HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2012
Posts: 6,555
Likes: 4,805
From: Omaha
Default
That makes sense. (PO over-richened the carb to compensate for an air leak)

I'd go back to where I started: Go to CV Performance and review the documentation. Get a jet kit. I'd go ahead and get a rebuild kit, too. Pull the carb, find out what jets you're running. I'd put everything back to stock and then work from there.
 
Reply
0
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Jun 6, 2018 | 08:10 AM
Share
  #9  
Kingglide549's Avatar
Kingglide549
Banned
Joined: May 2018
Posts: 4,576
Likes: 978
From: Viet Vet, crossroads
Default
My truant answer-install an AFR unit and know whats what and stop guessing.
 
Reply
1
Old Jun 6, 2018 | 08:19 AM
Share
  #10  
elmo4fun's Avatar
elmo4fun
Thread Starter
|
Advanced
Joined: Apr 2014
Posts: 81
Likes: 5
From: upstate NY
Default
AFR unit?
 
Reply
0



Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 02:12 AM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE