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 tapped adjust
Last Post: needspeed
Posted On: 2 Minutes Ago
Replies: 6
Views: 202
0 Matrix brakes
Last Post: tonystylec
Posted On: 27 Minutes Ago
Replies: 4
Views: 68
0 PLEASE READ THIS Before You Post In 'The BUY - SELL - TRADE Zone'!
Last Post: Folkie
Posted On: 39 Minutes Ago
Replies: 1
Views: 88
6 ironhead turn signals
Last Post: 19ironhead75
Posted On: 1 Hour Ago
Replies: 0
Views: 9
0 Mustang Seat FS
Last Post: 60Gunner
Posted On: 1 Hour Ago
Replies: 1
Views: 15
0 Opinions (On Bike Considering Buying)
Last Post: Racepres
Posted On: 1 Hour Ago
Replies: 8
Views: 240
0 New Jagg oil cooler adapter for 2004+ Sportsters
Last Post: salmanmr
Posted On: 1 Hour Ago
Replies: 6
Views: 1,362
0 The salty debate thread.
Last Post: DEEP DIVER
Posted On: 1 Hour Ago
Replies: 40
Views: 1,436
0 MPG HONESTLY, what do you get?
Last Post: Tomcatt
Posted On: 1 Hour Ago
Replies: 609
Views: 87,259
0 Kick starter resistance
Last Post: metal88
Posted On: 1 Hour Ago
Replies: 14
Views: 317
0 79-85 Breather Vent Mod - Adding a Secondary Vent Hose at 6:00 Position
Last Post: Hippysmack
Posted On: 2 Hours Ago
Replies: 11
Views: 374
0 Ultima electronic ignition installation - Solved
Last Post: darwin-t
Posted On: 3 Hours Ago
Replies: 76
Views: 2,655
0 What did you do for your sporty Today?
Last Post: Crusty
Posted On: 3 Hours Ago
Replies: 7,150
Views: 1,040,329
0 1200S race bike miss at 3500-400
Last Post: ftwflh
Posted On: 3 Hours Ago
Replies: 28
Views: 525
0 Static timing
Last Post: ftwflh
Posted On: 3 Hours Ago
Replies: 7
Views: 329
0 how to check cam postion sensor
Last Post: ftwflh
Posted On: 3 Hours Ago
Replies: 10
Views: 380
0 Hello New in the Forum
Last Post: Dosmie72
Posted On: 4 Hours Ago
Replies: 12
Views: 152
0 Hottie of the day, no nudity.
Last Post: trainman
Posted On: 4 Hours Ago
Replies: 22,075
Views: 2,259,223
0 Fuel Pump Problems
Last Post: Lowe175
Posted On: 5 Hours Ago
Replies: 258
Views: 165,734
0 ....1
Last Post: Graywolf
Posted On: 6 Hours Ago
Replies: 5,814
Views: 333,895
0 Potential future changes for the Sportster motor?
Last Post: Nibelungen
Posted On: 6 Hours Ago
Replies: 43
Views: 1,771
0 What's your opinion on windshields?
Last Post: boomerguy
Posted On: 7 Hours Ago
Replies: 1,247
Views: 221,641
0 Do you use premium gas in your Sportster?
Last Post: XL1275
Posted On: 10 Hours Ago
Replies: 1,837
Views: 389,879
0 KT - 2020 - Where Eagles Dare
Last Post: IXL2Relax
Posted On: 15 Hours Ago
Replies: 60
Views: 14,002
0 Which cams ?
Last Post: rocketmangb
Posted On: 15 Hours Ago
Replies: 15
Views: 2,083
0 Anyone go racing last weekend?
Last Post: Tinz
Posted On: 15 Hours Ago
Replies: 3,222
Views: 332,445
0 Front end restoration
Last Post: Dosmie72
Posted On: 15 Hours Ago
Replies: 8
Views: 473
0 Accelerator nozzle and idle not right
Last Post: IXL2Relax
Posted On: 15 Hours Ago
Replies: 66
Views: 2,660
0 2020 east coast meet and greet.
Last Post: mick42
Posted On: 16 Hours Ago
Replies: 215
Views: 17,818
0 This is gonna hurt.
Last Post: hexnut
Posted On: 16 Hours Ago
Replies: 8,167
Views: 1,743,413
More...
Members Birthdays
Reply
 
Share Thread Tools Display Modes
  #21  
Old 5th August 2020
kitabel kitabel is offline
Harley Engineer
 
Join Date: Oct 2019
Posts: 326
Sportster/Buell Model: 883 Evo
Sportster/Buell Year: 1989
Reputation: 105148
kitabel has much to be proud ofkitabel has much to be proud ofkitabel has much to be proud ofkitabel has much to be proud ofkitabel has much to be proud ofkitabel has much to be proud ofkitabel has much to be proud ofkitabel has much to be proud ofkitabel has much to be proud ofkitabel has much to be proud ofkitabel has much to be proud of
Default

no tech b's with a dozen opinions from textbook experts that never did it

I'll just leave that here for a while. So funny!
Reply With Quote
  #22  
Old 5th August 2020
Hippysmack's Avatar
Hippysmack Hippysmack is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2014
Posts: 6,385
Sportster/Buell Model: Xl1250S
Sportster/Buell Year: 98
Other Motorcycle Model: Kawasaki Vulcan 500
Other Motorcycle Year: 95
Reputation: 6323948
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

This is from Dr Dick's thread on opening / closing times of the breather.
http://xlforum.net/forums/showthread...1204854&page=3
There isn't but little over a thou difference in his dims and yours kitabel.
For some reason, your posts seem to be going away?

__________________
Reference the XLFORUM'S Sportsterpedia for additional technical information & advice

In Search of Fuel, Sunshine and a Steady Idle.
Reply With Quote
  #23  
Old 5th August 2020
Ferrous Head's Avatar
Ferrous Head Ferrous Head is offline
Blind Owl
 
Join Date: Jun 2009
Location: Sunshine Coast
Posts: 5,490
Sportster/Buell Model: XLB, XLCH, Sporton
Sportster/Buell Year: 1962
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1966
Other Motorcycle Model: XLCH (Another one)
Other Motorcycle Year: 1966
Reputation: 1233851
Ferrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond reputeFerrous Head has a reputation beyond repute
Default

I don't know if anyone has done enough actual research on the breather timing to nail it. The only figure I can remember seeing was OB listing 27 ATDC. But that was for blue printed KR's.
Would that change for a 900 ? Yes, I'm sure. Would that change for a 1000 ? Yes, I', sure it would. But the KR's ran to 6,000 and the Sportsters can run to 7,000.
What happens when you build a 1365 cc engine that only runs to 5,500 ?

What happens when you block the transfer valve to run a dry primary ?

What happens when you add a hose to the breather tube to dump the oil mist somewhere other than your rear tire ?

I'm not even sure the problems with oil in the sump were totally caused by the breather timing. Probably it is but ......

Maybe the oil scrapers were not as close to the wheels on some engines. Maybe the transfer gallery was a little rougher cast in some engines ?

You can always shim the pinion gear (or remove some material or swap for another one until you get it perfectly centered in the window.

Will you gain anything ?

Who knows ? On a stock engine the problem never seems to rear it's ugly head. Or maybe it does and we don't notice it ?
If we don't notice it is it worth worrying about ?

If you do build it as a race engine do you take into account changes you make and the revs you run at ?

So, what figure do you change it too ?

At lower rpm's a narrow window probably works fine. As the rpm's rise the time the window is open reduces and possibly there's not enough time for the pressure drop to occur fully. Widening the window would fix that. But there may also be an optimum closing point and that may then be effected.

Questions, questions, so many questions.

Is this why Bill Werner invented the mini sump ?
__________________
"I know only too well the evil that I propose. But my inclinations get the better of me."
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 18:25.


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