Harley Davidson Forums

Dyna Glide Models Super Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
Sponsored by:
Sponsored by:

Is compression release mandatory for 107 build?

Thread Tools
 
Search this Thread
 
Old Apr 9, 2013 | 01:10 PM
Share
  #21  
128auto's Avatar
128auto
Thread Starter
|
Extreme HDF Member
Joined: Sep 2006
Posts: 10,114
Likes: 29
From: Vancouver B.C. Canada
Default
Well if that is the case, I might just get B heads from FM with compression release installed. The jig thing isn't easy, have seen it on youtube, you need a powerful drill to do that, beyond my skill lol.
How do you wire them? I thought the wiring harness came with the bike, can I program it with my PV?

Originally Posted by soft 02
ACR's themselves are much more espensive and you have to wire them into the harnes. For that price you could just buy the jig and sell it when your done. I think the jig is like 250.
 
Reply
0
Old Apr 9, 2013 | 01:13 PM
Share
  #22  
soft 02's Avatar
soft 02
Seasoned HDF Member
Joined: Mar 2007
Posts: 66,948
Likes: 4,573
From: TOAK western branch
Default
Originally Posted by 128auto
Well if that is the case, I might just get B heads from FM with compression release installed. The jig thing isn't easy, have seen it on youtube, you need a powerful drill to do that, beyond my skill lol.
How do you wire them? I thought the wiring harness came with the bike, can I program it with my PV?
Your bike is capable but you need to buy the harness and install the pins into the ECU connector then turn it on with your tuner. Isnt cut and dry and if it ever fails the valve covers have to come off as they are in the middle of the head. MCR's are the wat to go IMHO.
 
Reply
0
Old Apr 9, 2013 | 01:47 PM
Share
  #23  
JRK5892's Avatar
JRK5892
Banned
Joined: Mar 2007
Posts: 19,481
Likes: 25
From: Chicago suburbs (Elgin/Schaumburg)
Default
Originally Posted by vdop
No it's not mandatory, yes it's highly recommended. Manuals are a piece of cake to install, automatics will cost a little more to have done. If you're gonna build it do it right the first time.
this is 100% the spot on answer... i did manual in mine, and well worth it... i also like JP cycles high crank battery or braille battery... but to be honest if you run compression releases the stock HD battery will be just fine
 
Reply
0
Old Apr 9, 2013 | 02:41 PM
Share
  #24  
IzzoQuazzo's Avatar
IzzoQuazzo
Retired Admin
Veteran: Army
Joined: Jul 2006
Posts: 21,865
Likes: 9,047
From: Wisconsin
Default
I don't have a hot build, just a 103 with 255 cams. Bike starts easy when cold, but when it's hot out it can be problem without the CRs. I'm glad I had them installed.
 
Reply
0
Old Apr 9, 2013 | 03:14 PM
Share
  #25  
128auto's Avatar
128auto
Thread Starter
|
Extreme HDF Member
Joined: Sep 2006
Posts: 10,114
Likes: 29
From: Vancouver B.C. Canada
Default
Question, when you install a compression release, I assume you have to shut off the valves manually after the motor runs, correct?
 
Reply
0
Old Apr 9, 2013 | 03:24 PM
Share
  #26  
soft 02's Avatar
soft 02
Seasoned HDF Member
Joined: Mar 2007
Posts: 66,948
Likes: 4,573
From: TOAK western branch
Default
Originally Posted by 128auto
Question, when you install a compression release, I assume you have to shut off the valves manually after the motor runs, correct?
No. Manual one's you push the button tops befor you start it. The engine's compression closes them.
 
Reply
0
Old Apr 9, 2013 | 03:33 PM
Share
  #27  
128auto's Avatar
128auto
Thread Starter
|
Extreme HDF Member
Joined: Sep 2006
Posts: 10,114
Likes: 29
From: Vancouver B.C. Canada
Default
Hey, that may not be a bad idea! I just worry about sometimes I forget to shut it off. Do all compression release valves work the same way? Thanks!

Originally Posted by soft 02
No. Manual one's you push the button tops befor you start it. The engine's compression closes them.
 
Reply
0
Old Apr 9, 2013 | 07:32 PM
Share
  #28  
target64's Avatar
target64
Stellar HDF Member
10 Year Member
Joined: Jan 2013
Posts: 2,464
Likes: 50
From: Rouses Point, N.Y.
Default
highly recommend manual releases, after riding when stopping for fuel a few minutes of heat soak and my 107 cranks pretty hard with out hitting the releases. you will be replacing the starter sooner then u want to.
 
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 Apr 9, 2013 | 07:33 PM
Share
  #29  
oldlefty's Avatar
oldlefty
Tourer
Joined: Aug 2011
Posts: 394
Likes: 0
From: west coast. Canada
Default
Originally Posted by 128auto
Hey, that may not be a bad idea! I just worry about sometimes I forget to shut it off. Do all compression release valves work the same way? Thanks!
pretty much. you have to push them to open them before you start your bike. when the bike fires, the valves slam shut and stay that way until you shut it off. then you press them down before starting again.
 
Reply
0
Old Apr 13, 2013 | 10:12 AM
Share
  #30  
128auto's Avatar
128auto
Thread Starter
|
Extreme HDF Member
Joined: Sep 2006
Posts: 10,114
Likes: 29
From: Vancouver B.C. Canada
Default
After all, I might get the Jims tool to make my own. Now my question is, how big a drill do I need? The drill bit is quite big but drilling aluminum shouldn't be that bad I guess.
 
Reply
0



Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 03:23 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