The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Era Specific and Model Specific > Ironhead Sportster Motorcycle Talk (1957-1985)
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Notices

Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

Active Threads
0 Happy Thanksgiving
Last Post: sportsterpaul
Posted On: 31 Minutes Ago
Replies: 7
Views: 108
0 09 Alarm / Siren / Regulator issues
Last Post: IXL2Relax
Posted On: 32 Minutes Ago
Replies: 1
Views: 32
0 Keep & Kill
Last Post: Graywolf
Posted On: 35 Minutes Ago
Replies: 18,795
Views: 1,117,921
0 What did you do for your sporty Today?
Last Post: sml1226
Posted On: 37 Minutes Ago
Replies: 7,332
Views: 1,086,327
0 Grateful Dead Timing Cover Source?
Last Post: sportsterpaul
Posted On: 48 Minutes Ago
Replies: 32
Views: 1,257
0 Halloween 1250 Conversion
Last Post: sportsterpaul
Posted On: 53 Minutes Ago
Replies: 69
Views: 4,457
0 Food porn
Last Post: sportsterpaul
Posted On: 58 Minutes Ago
Replies: 2,147
Views: 435,089
0 What about these cheap CV carb kits?
Last Post: Ferrous Head
Posted On: 1 Hour Ago
Replies: 28
Views: 1,742
0 Better Brakes
Last Post: Ferrous Head
Posted On: 1 Hour Ago
Replies: 15
Views: 391
0 Newbie
Last Post: BitterOldMan
Posted On: 1 Hour Ago
Replies: 35
Views: 805
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 1 Hour Ago
Replies: 24,148
Views: 2,468,903
0 Mid Control?!
Last Post: Mission1
Posted On: 2 Hours Ago
Replies: 3
Views: 66
0 Northern Canada late 1950’s
Last Post: npaisnel
Posted On: 2 Hours Ago
Replies: 7
Views: 263
0 This week on Craig's list
Last Post: GA_Ironhead
Posted On: 3 Hours Ago
Replies: 4,908
Views: 690,194
0 Oil leaks
Last Post: Tomcatt
Posted On: 3 Hours Ago
Replies: 12
Views: 159
0 oil bag
Last Post: harley506d
Posted On: 3 Hours Ago
Replies: 1
Views: 76
0 OEM Headlight Bucket?
Last Post: Mission1
Posted On: 4 Hours Ago
Replies: 0
Views: 54
4 1995 S2 buell
Last Post: J!nx
Posted On: 4 Hours Ago
Replies: 10
Views: 191
0 Swap from electronic ign. to points?
Last Post: mikethebike61
Posted On: 5 Hours Ago
Replies: 20
Views: 2,580
0 Spacer swingarm bearing
Last Post: eddie XLX
Posted On: 5 Hours Ago
Replies: 4
Views: 133
0 Chris Farley Bike
Last Post: skien
Posted On: 6 Hours Ago
Replies: 6
Views: 494
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Stairman
Posted On: 6 Hours Ago
Replies: 48,896
Views: 7,924,128
0 carbs?
Last Post: brucstoudt
Posted On: 6 Hours Ago
Replies: 20
Views: 4,658
0 81 parts
Last Post: Andy Hog
Posted On: 8 Hours Ago
Replies: 4
Views: 301
0 Hot Chicks on Hot Bikes
Last Post: Stairman
Posted On: 8 Hours Ago
Replies: 11,357
Views: 2,277,916
0 SPRINGER Front End JUST RIGHT CHOPPER HEIGHT?
Last Post: Desertfox
Posted On: 13 Hours Ago
Replies: 5
Views: 461
0 MS rollers way too tight
Last Post: forqueue
Posted On: 14 Hours Ago
Replies: 17
Views: 683
0 XLCR replica in progress
Last Post: rg500
Posted On: 15 Hours Ago
Replies: 22
Views: 2,240
5 1200 or 883
Last Post: XL1275
Posted On: 18 Hours Ago
Replies: 1,268
Views: 370,954
0 Roadster Inverted Forks (again)
Last Post: felis
Posted On: 19 Hours Ago
Replies: 25
Views: 2,762
More...
Members Birthdays
excel50 (79), blazer95 (70), mycle1000, Barryn37 (59), QBALL (59), paulieb (58), cfranz (47), BMXATV (46), ravyn3 (41), Texas_Wild, hillpope (38)
Reply
 
Share Thread Tools Display Modes
  #141  
Old 3 Weeks Ago
bustert's Avatar
bustert bustert is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2008
Posts: 10,155
Sportster/Buell Model: 1200s
Sportster/Buell Year: 2001
Sportster/Buell Model #2: xlch
Sportster/Buell Year #2: 1974
Reputation: 3254109
bustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond repute
Default

your testing have proven that.
i am pretty sure everyone knows this but i will mention it for grins and giggles. when boring, it is possible to move the skirt hole up in relation to the bore, the fix is to add a tapered channel to help bring it back to normal, that said, hd wasn't that well into quality control so sometimes this was a bigger issue and required more fore thought.
Reply With Quote
  #142  
Old 3 Weeks Ago
Hippysmack's Avatar
Hippysmack Hippysmack is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2014
Posts: 6,660
Sportster/Buell Model: Xl1250S
Sportster/Buell Year: 98
Other Motorcycle Model: Kawasaki Vulcan 500
Other Motorcycle Year: 95
Reputation: 6687316
Hippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond repute
Default

I wanted to clear up something else.
Theory....

What is theory, from the dictionary:
https://www.merriam-webster.com/dictionary/theory

1 :
a plausible or scientifically acceptable general principle or body of principles offered to explain phenomena
//the wave theory of light

2
a : a belief, policy, or procedure proposed or followed as the basis of action
//her method is based on the theory that all children want to learn

b : an ideal or hypothetical set of facts, principles, or circumstances —often used in the phrase in theory
//in theory, we have always advocated freedom for all

3
a : a hypothesis assumed for the sake of argument or investigation

b : an unproved assumption : conjecture

c : a body of theorems presenting a concise systematic view of a subject
//theory of equations

4 :
the general or abstract principles of a body of fact, a science, or an art
//music theory

5 :
abstract thought : speculation

6 : the analysis of a set of facts in their relation to one another
__________________
Reference the XLFORUM'S Sportsterpedia for additional technical information & advice

In Search of Fuel, Sunshine and a Steady Idle.
Reply With Quote
  #143  
Old 3 Weeks Ago
Hippysmack's Avatar
Hippysmack Hippysmack is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2014
Posts: 6,660
Sportster/Buell Model: Xl1250S
Sportster/Buell Year: 98
Other Motorcycle Model: Kawasaki Vulcan 500
Other Motorcycle Year: 95
Reputation: 6687316
Hippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond repute
Default

So, in theory, 76< rocker boxes will alternate between differential pressures due to piston action.
And in theory, so will the gearcase.
Reply With Quote
  #144  
Old 3 Weeks Ago
bustert's Avatar
bustert bustert is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2008
Posts: 10,155
Sportster/Buell Model: 1200s
Sportster/Buell Year: 2001
Sportster/Buell Model #2: xlch
Sportster/Buell Year #2: 1974
Reputation: 3254109
bustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond repute
Default

mr. frenchowl made a valid point. the case breathes through an open hole only hindered by the oil separator washer. will there be diff'l in the cam case, well yes. remember you have restriction in the p/r tubes so it isn't exactly open to the world. over all, you will have more going out than in but at idle, you can detect a pulse. will this effect the flywheel compartment, humm, kinda sorta, but it would be in the nano range since the rotary breather in in the mix. with the umbrella system, the entire engine will be near the same.
if you were to test with a manometer, it would have to be on the timing hole.
Reply With Quote
  #145  
Old 3 Weeks Ago
Hippysmack's Avatar
Hippysmack Hippysmack is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2014
Posts: 6,660
Sportster/Buell Model: Xl1250S
Sportster/Buell Year: 98
Other Motorcycle Model: Kawasaki Vulcan 500
Other Motorcycle Year: 95
Reputation: 6687316
Hippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond reputeHippysmack has a reputation beyond repute
Default

yeah, I'm not saying a huge amount of vacuum.
But you can't move air without some amount of differential pressure.
Reply With Quote
  #146  
Old 3 Weeks Ago
bustert's Avatar
bustert bustert is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2008
Posts: 10,155
Sportster/Buell Model: 1200s
Sportster/Buell Year: 2001
Sportster/Buell Model #2: xlch
Sportster/Buell Year #2: 1974
Reputation: 3254109
bustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond reputebustert has a reputation beyond repute
Default

it will probably follow along the same lines when testing via the timing port. you cannot use the downspout as a tap since it will blow the water out the tube and also effect the case readings. if you test on the tachometer drive using a plug then you can test case readings.
you are probably right on the vac if any and a wide swing on the level, probably will need a snubber.
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT +1. The time now is 00:35.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC