Engine Mechanical Topics Discussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.

99 Softail High Compression When Hot

Thread Tools
 
Search this Thread
 
Old Aug 24, 2021 | 08:29 AM
  #11  
98hotrodfatboy's Avatar
98hotrodfatboy
Seasoned HDF Member
15 Year Member
Liked
Loved
Top Answer: 5
Joined: Mar 2010
Posts: 21,100
Likes: 7,629
From: Poolville
Default

Originally Posted by wfolarry
Lifters bleeding down when hot could be the cause.
I thought I mentioned that but must have been another thread.. but valid point....
 
Reply
Old Aug 24, 2021 | 09:21 AM
  #12  
Highwayman99's Avatar
Highwayman99
Thread Starter
|
Advanced
5 Year Member
Joined: Oct 2018
Posts: 80
Likes: 17
From: Clearwater Florida
Default

OK that is something to check, thanks!
 
Reply
Old Aug 24, 2021 | 07:54 PM
  #13  
Highwayman99's Avatar
Highwayman99
Thread Starter
|
Advanced
5 Year Member
Joined: Oct 2018
Posts: 80
Likes: 17
From: Clearwater Florida
Default

I haven't had a chance to look at this yet but I thought that I should also mention since you brought up lifters that I have adjustable pushrods. I am not hearing them rattling so I don't think that they are loose.
 
Reply
Old Aug 25, 2021 | 07:00 AM
  #14  
bustert's Avatar
bustert
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2008
Posts: 5,064
Likes: 1,003
Default

do not think the lifters are the issue. all lifters bleed down but if adjusted correctly has nill effects especially at cranking rpm.
you did not mention how the starter sounds as it is cranking.
timing as mentioned is a likely suspect.
 
Reply
Old Aug 25, 2021 | 07:02 AM
  #15  
wfolarry's Avatar
wfolarry
Tourer
15 Year Member
Liked
Loved
Community Favorite
Joined: Apr 2007
Posts: 412
Likes: 281
From:
Default

Originally Posted by bustert
do not think the lifters are the issue. all lifters bleed down but if adjusted correctly has nill effects especially at cranking rpm.
you did not mention how the starter sounds as it is cranking.
timing as mentioned is a likely suspect.
Wrong.
 
Reply
Old Aug 26, 2021 | 08:28 AM
  #16  
bustert's Avatar
bustert
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2008
Posts: 5,064
Likes: 1,003
Default

one very important fact you are not considering mr. w is:
cranking speed. there is way more time for the cyls to fill so it is nearly a full fill but as rpm increases, time reduces and you get a partial fill.
if it is as you say, then engines since the first hyd lifter was used would have issues and down to this day.
will there be diff, why sure, but, as i said, nill effects, aka, nothing to worry about and cannot be corrected unless you go solids!
now if you talk running rpm, then there will be bigger issues.
 
Reply
Old Aug 26, 2021 | 08:47 AM
  #17  
fat00boy's Avatar
fat00boy
Cruiser
5 Year Member
Joined: Jun 2018
Posts: 121
Likes: 53
From: western ma
Default

When the intake valve closes determines how much the cylinder fills not the cranking speed
 
Reply
Old Aug 26, 2021 | 09:37 AM
  #18  
98hotrodfatboy's Avatar
98hotrodfatboy
Seasoned HDF Member
15 Year Member
Liked
Loved
Top Answer: 5
Joined: Mar 2010
Posts: 21,100
Likes: 7,629
From: Poolville
Default

Technically, the ivc close determines the effect stroke of the Piston in the cylinder.... The latter the ivc the shorter the effective stroke...
 
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 Aug 26, 2021 | 09:49 AM
  #19  
Highwayman99's Avatar
Highwayman99
Thread Starter
|
Advanced
5 Year Member
Joined: Oct 2018
Posts: 80
Likes: 17
From: Clearwater Florida
Default

Just to make sure this is related to the issue I am having the problem of the starter having an issue to crank the motor only occurs when the motor is hot after a long run and the restart is attempted within 15 or 20 minutes of shutting off the motor. If the bike sits for an hour or so then I never have an issue with the starter struggling.
 
Reply
Old Aug 26, 2021 | 09:52 AM
  #20  
Max Headflow's Avatar
Max Headflow
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,900
Likes: 8,007
From: poway
Default

While the leaky lifter is good, and ignition timing off another, I suspect that the 3rd could simply be weak battery. It's probably worth going through the cables and make sure they are up to snuff and making good contact. It's a vibratory softail so even loose terminals could cause the issue.
 
Reply



All times are GMT -5. The time now is 02:33 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