Softail Models Standard, Custom, Night Train, Deuce, Springer, Heritage, Fatboy, Deluxe, Rocker and Cross Bones.
Sponsored by:
Sponsored by:

Big bang on start

Thread Tools
 
Search this Thread
 
Old May 19, 2020 | 09:28 PM
  #1  
stewd8's Avatar
stewd8
Thread Starter
|
Advanced
5 Year Member
Liked
Joined: Nov 2016
Posts: 72
Likes: 10
From: pemberton b.c.
Default Big bang on start

IM TRYING TO UNDERSTAND THIS,,, MY BIKE ,,,04 88 TC HERITAGE, SE 204 CAMS,, CAM PLATE, RYNHART, SHORT SHOTGUNS, K&N AIR FILTER,, I DO NOT KNOW IF ITS BEEN FUEL MAPPED AT ALL,,,,
--ROUGH IDLE, BUT STARTS RIGHT UP
--BIG POP OR BANG ON START UP COLD,, NONE WHEN HOT
--CRUISING,, NOT OFF OR ON THROTTLE MISSING, BAD
--PLUGS ARE WHITER AND CLEANER THEN NEW ONES
MY THOUGHTS,,, DRIPPY INJECTOR, AND A FUEL MAPPING,,, OR,,, BIGGER FUEL INJECTORS THAT WILL RICHEN THE HOLE FUEL SYSTEM AS THESE GUY EXPLAIN AT END,,,, AND HOW MUCH WILL THEY RICHEN IT...
WITH THIS COVID 19,,, IM TRYING TO DO THIS CHEAP,,,AS IM BROKE THESE DAYS

http://www.nightrider.com/biketech/m...i_upgrades.htm
 

Last edited by stewd8; May 19, 2020 at 10:42 PM.
Reply
Old May 19, 2020 | 09:41 PM
  #2  
Screamin beagle's Avatar
Screamin beagle
Seasoned HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2017
Posts: 5,315
Likes: 4,272
From: Granville New York
Default

Any flames? Bigger injectors alone wont give you more fuel...it doesnt work like a carb by putting in bigger jets. Are you sure its injected and not carbed? How long have you had it? Is this something that just started? I think s dealer can check if its been tuned or not...probably a good place to start. It sure sounds like its running lean.
 

Last edited by Screamin beagle; May 19, 2020 at 09:43 PM.
Reply
Old May 19, 2020 | 10:10 PM
  #3  
stewd8's Avatar
stewd8
Thread Starter
|
Advanced
5 Year Member
Liked
Joined: Nov 2016
Posts: 72
Likes: 10
From: pemberton b.c.
Default

Yes most definitely injected,,, flames, from where? Not that i have seen,, ive had it for 4 years, and ive put on 20,000 km, ,,,it has always done this,, since ive owned it,,,
 
Reply
Old May 19, 2020 | 10:33 PM
  #4  
stewd8's Avatar
stewd8
Thread Starter
|
Advanced
5 Year Member
Liked
Joined: Nov 2016
Posts: 72
Likes: 10
From: pemberton b.c.
Default

LARGER FUEL INJECTORS == YOU WANT TO RICHEN THE FUEL MAP AND DO NOT WANT TO USE SOME OF THE SIMPLER OR MORE COST EFFECTIVE WAYS TO DO THIS,,,,, IS WHAT IT SAYS,, AMONGST OTHER THINGS,,2.......2. You want to richen the fuel map and do not want to use some of the simpler or more cost effective ways to do this. You want to richen the fuel map and do not want to use some of the simpler or more cost effective ways to do this.
 

Last edited by stewd8; May 19, 2020 at 10:35 PM.
Reply
Old May 20, 2020 | 06:28 AM
  #5  
Madison Bill's Avatar
Madison Bill
Road Warrior
Veteran: Navy
10 Year Member
Photogenic
Loved
Joined: Oct 2014
Posts: 1,608
Likes: 1,132
From: Southconsin
Default

Originally Posted by stewd8
LARGER FUEL INJECTORS == YOU WANT TO RICHEN THE FUEL MAP AND DO NOT WANT TO USE SOME OF THE SIMPLER OR MORE COST EFFECTIVE WAYS TO DO THIS,,,,, IS WHAT IT SAYS,, AMONGST OTHER THINGS,,2.......2. You want to richen the fuel map and do not want to use some of the simpler or more cost effective ways to do this. You want to richen the fuel map and do not want to use some of the simpler or more cost effective ways to do this.
Lucky for me I knew about the super-secret squirrel font finder to read your post. I once had a bike with short pipes and all I had to do was give the throttle one twist and hit the starter...... Bang! Try a different set of plug wires and run some seafoam in your next tank of gas.
 
Reply
Old May 20, 2020 | 06:48 AM
  #6  
YZR's Avatar
YZR
Grand HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Jan 2019
Posts: 3,588
Likes: 2,827
From: Mostly Florida, some Michigan
Default

We're all friends here, NO NEED TO YELL!
 
Reply
Old May 20, 2020 | 08:17 AM
  #7  
Dan89FLSTC's Avatar
Dan89FLSTC
Seasoned HDF Member
Veteran: Navy
Active Streak: 30 Days
Top Answer: 3
Top Answer: 5
Joined: May 2008
Posts: 21,029
Likes: 12,550
From: South Carolina
Default

Man, if you want people to make an effort to help you, please type legibly.

Simple as that...
 
Reply
Old May 20, 2020 | 03:36 PM
  #8  
stewd8's Avatar
stewd8
Thread Starter
|
Advanced
5 Year Member
Liked
Joined: Nov 2016
Posts: 72
Likes: 10
From: pemberton b.c.
Default

Yes i have new plug wires on it,,, and i have gone through 4 cans of seafoam
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-1

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

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

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-6

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-7

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-8

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-9

Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

 Verdad Gallardo
Old May 20, 2020 | 04:22 PM
  #9  
Screamin beagle's Avatar
Screamin beagle
Seasoned HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2017
Posts: 5,315
Likes: 4,272
From: Granville New York
Default

You seem to be convinced that you need bigger injectors so just go for it. You can always sell them here for half price when you find out that now your bike is impossible to tune. I know i hate going to the dealer myself but sometimes theres just no work around. It should be cheap to just have them check you tune. Then you can work from there. You have to start somewhere and unless youre printing your own money just throwing parts at it isnt a very economical way to diagnose it. The flame comment was meant to be funny...you know a joke. Get things off on light note...your whole post was in caps so i just figured you needed some humor to back down off the cliff. You could pull your cam cover and check your cam timing, then make sure your pushrods are properly adjusted. If it were mine id really want to know if it had a tune or not.
 
Reply
Old May 20, 2020 | 04:34 PM
  #10  
Flanman55's Avatar
Flanman55
Intermediate
Joined: Jun 2015
Posts: 28
Likes: 2
From: Canada
Default

Mine did this the first time I got it. I bought it used in 2017. Its a 2008 Heritage 96B, that i suspect had engine work. Anyways, I would hit the starter and it ounded liked **** but would start with a bang. Turns out that it has decompression ***** I have to push every start. Have a look at your heads.
 
Reply



All times are GMT -5. The time now is 10:51 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

Slideshow: Graeme Billington's left-hand-drive Shovelhead is as much about problem-solving as it is about classic Harley form.

By Verdad Gallardo | 2025-12-30 11:27:08


VIEW MORE