EVO All Evo Model Discussion

Carburetor problems please help

Thread Tools
 
Search this Thread
 
Old Oct 28, 2021 | 05:33 PM
  #1  
Softail1992richie's Avatar
Softail1992richie
Thread Starter
|
3rd Gear
Joined: Oct 2021
Posts: 7
Likes: 0
From: Plymouth Massachusetts
Default Carburetor problems please help

Hey guys I have a 1992 harley davidson softail heritage classic. 27000 miles on it ran great the other day our of the blue when it gets warmed up the idle goes high and it over heats real quick because of it . But no problem just out of the blue . I have sprayed around the intakes to see maybe a vacuum leak there but nothing. It's a regular cv carb . I personally have never messed with them .
 
Reply

Popular Reply

 
Oct 28, 2021, 07:50 PM
Dan89FLSTC's Avatar
Dan89FLSTC
Seasoned HDF Member
Veteran: Navy
Active Streak: 30 Days
Top Answer: 3
Top Answer: 5
Joined: May 2008
Posts: 21,143
Likes: 12,706
From: South Carolina
Default

Originally Posted by Paintslinger16

It’s 30 years old, I wouldn’t mess with rebuilding it when a S&S is infinitely better
Seriously, you are advising the OP to spend over 600 dollars on a new carburetor (which is certainly not infinitely better), instead rebuilding a CV carb (a rebuild kit is about 20 bucks).

Again, ridiculous.

The OP can decide who is giving the best advice here.
 
Old Oct 28, 2021 | 07:23 PM
  #2  
Paintslinger16's Avatar
Paintslinger16
Stellar HDF Member
Active Streak: 120 Days
Joined: Aug 2018
Posts: 2,392
Likes: 2,628
From: Milwaukee, WI
Default

Nothing binding the grip or cables?
the CV,s are rebuildable, but going with a S&S super E will give you less headaches
 
Reply
Old Oct 28, 2021 | 07:32 PM
  #3  
Dan89FLSTC's Avatar
Dan89FLSTC
Seasoned HDF Member
Veteran: Navy
Active Streak: 30 Days
Top Answer: 3
Top Answer: 5
Joined: May 2008
Posts: 21,143
Likes: 12,706
From: South Carolina
Default

Disconnect the throttle cables from the carb and then check the movement of the throttle to see if there is any binding in the cables.

The carb is right at 30 years old, it wouldn`t hurt to disassemble it and clean it.

You can get rebuild kits from several online sources such as CV Performance.

https://cv-performance.com/brands/CV-Performance.html


Originally Posted by Paintslinger16
going with a S&S super E will give you less headaches
That is a ridiculous statement.

The CV carb is as dependable, and easy to work on as any carburetor out there.
 

Last edited by Dan89FLSTC; Oct 28, 2021 at 07:45 PM.
Reply
Old Oct 28, 2021 | 07:39 PM
  #4  
Paintslinger16's Avatar
Paintslinger16
Stellar HDF Member
Active Streak: 120 Days
Joined: Aug 2018
Posts: 2,392
Likes: 2,628
From: Milwaukee, WI
Default

Originally Posted by Dan89FLSTC
That is a ridiculous statement.

The CV carb is as dependable as any carburetor out there.
don’t think they are junk, by any means, but not user friendly or have the built in adjustability a E has.
It’s 30 years old, I wouldn’t mess with rebuilding it when a S&S is infinitely better
 
Reply
Old Oct 28, 2021 | 07:40 PM
  #5  
mike131's Avatar
mike131
Road Warrior
10 Year Member
Liked
Loved
Community Favorite
Joined: Dec 2012
Posts: 1,539
Likes: 692
From: magnolia tx
Default

CVs are great carbs, sometimes intake manifold vacuum leaks are hard to detect, sometimes you just have to take apart and inspect, the enricher "choke" plunger maybe wore out, check vacuum hose to voes switch and voes switch itself for vacuum leaks, if you have one on your bike
 
Reply
Old Oct 28, 2021 | 07:44 PM
  #6  
mike131's Avatar
mike131
Road Warrior
10 Year Member
Liked
Loved
Community Favorite
Joined: Dec 2012
Posts: 1,539
Likes: 692
From: magnolia tx
Default

Also check the enricher cable itself for proper adjustment and rubber boot
 
Reply
Old Oct 28, 2021 | 07:50 PM
  #7  
Dan89FLSTC's Avatar
Dan89FLSTC
Seasoned HDF Member
Veteran: Navy
Active Streak: 30 Days
Top Answer: 3
Top Answer: 5
Joined: May 2008
Posts: 21,143
Likes: 12,706
From: South Carolina
Default

Originally Posted by Paintslinger16

It’s 30 years old, I wouldn’t mess with rebuilding it when a S&S is infinitely better
Seriously, you are advising the OP to spend over 600 dollars on a new carburetor (which is certainly not infinitely better), instead rebuilding a CV carb (a rebuild kit is about 20 bucks).

Again, ridiculous.

The OP can decide who is giving the best advice here.
 
Old Oct 28, 2021 | 07:59 PM
  #8  
mike131's Avatar
mike131
Road Warrior
10 Year Member
Liked
Loved
Community Favorite
Joined: Dec 2012
Posts: 1,539
Likes: 692
From: magnolia tx
Default

I would have to agree with Dan, S&S are good carbs but the suffer from the same limitations any butterfly carb suffers from with a fixed venturi
 
Reply
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 Oct 28, 2021 | 08:04 PM
  #9  
Tommy C's Avatar
Tommy C
Seasoned HDF Member
10 Year Member
Joined: Oct 2015
Posts: 13,491
Likes: 34,589
From: Pine Flat Dam/South Bay Area, CA
Default

Originally Posted by Dan89FLSTC
Seriously, you are advising the OP to spend over 600 dollars on a new carburetor (which is certainly not infinitely better), instead rebuilding a CV carb (a rebuild kit is about 20 bucks).

Again, ridiculous.

The OP can decide who is giving the best advice here.
By design the CV is a great carburetor because it can compensate for altitude better than a simple butterfly carburetor such as the S&S. The S&S is simpler to work on, but as far as performance goes, a CV can easily feed a 100 horsepower EVO engine.
 
Reply
Old Oct 28, 2021 | 10:19 PM
  #10  
Firedude2's Avatar
Firedude2
Tourer
Liked
Loved
Community Favorite
Joined: Jun 2021
Posts: 303
Likes: 146
From: Az
Default

I got to go with put a kit in it and seal the intake like mentioned above. CV is a real good carb and easy to work on.
Make sure you check for ignition melt before you dig in. Very common with evo’s.
 

Last edited by Firedude2; Oct 28, 2021 at 10:38 PM.
Reply



All times are GMT -5. The time now is 06:06 PM.

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