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
7 1983 Ironhead motor in a 1996 EVO frame?
Last Post: 4schizzle
Posted On: 18 Minutes Ago
Replies: 31
Views: 3,231
5 Tire Pressure?
Last Post: Iron Mike
Posted On: 22 Minutes Ago
Replies: 49
Views: 5,361
0 Keep & Kill
Last Post: Graywolf
Posted On: 25 Minutes Ago
Replies: 19,580
Views: 1,167,771
0 Mid West Meet & Greet
Last Post: sportsterpaul
Posted On: 31 Minutes Ago
Replies: 815
Views: 81,406
0 75 IH Oil leaking into starter from primary side/ bendix
Last Post: BelleBanger
Posted On: 39 Minutes Ago
Replies: 0
Views: 9
0 Snippets
Last Post: sportsterpaul
Posted On: 41 Minutes Ago
Replies: 414
Views: 45,944
0 What Sort Of Sporty Have You Got?
Last Post: sportsterpaul
Posted On: 48 Minutes Ago
Replies: 1,162
Views: 359,018
0 Corona Virus
Last Post: hammer6315
Posted On: 1 Hour Ago
Replies: 996
Views: 96,272
0 Any experience with REBUILT title?
Last Post: Iron Mike
Posted On: 1 Hour Ago
Replies: 25
Views: 435
0 Boardtracker Project
Last Post: sml1226
Posted On: 2 Hours Ago
Replies: 646
Views: 132,472
0 did .you ever kick a good man when he,, was down
Last Post: doodah man
Posted On: 3 Hours Ago
Replies: 9
Views: 404
0 Smoke and top end job
Last Post: Iron Mike
Posted On: 3 Hours Ago
Replies: 34
Views: 2,283
0 Iree's late night cafe
Last Post: Ireeman
Posted On: 3 Hours Ago
Replies: 1,802
Views: 255,633
0 v twin Crankshaft Bushing Plate Pilot and Reamer
Last Post: Iron Mike
Posted On: 3 Hours Ago
Replies: 5
Views: 114
0 Mimi the Deerslayer: the triple threat
Last Post: thecarfarmer
Posted On: 3 Hours Ago
Replies: 8
Views: 226
4 2021 - only 3 Sportster models left
Last Post: psycho69
Posted On: 4 Hours Ago
Replies: 22
Views: 661
0 Clearance between clutch faces 1974 transmission
Last Post: brucstoudt
Posted On: 4 Hours Ago
Replies: 40
Views: 2,825
0 Pinion shaft roller bearing plug fit
Last Post: Jaime1840
Posted On: 5 Hours Ago
Replies: 19
Views: 1,162
0 Poll: Do you change tires yourself?
Last Post: rider61
Posted On: 5 Hours Ago
Replies: 137
Views: 38,271
0 Should I apolgise to Harley Davidson ?
Last Post: brucstoudt
Posted On: 5 Hours Ago
Replies: 65
Views: 5,665
0 Secret Australian Business
Last Post: Ferrous Head
Posted On: 5 Hours Ago
Replies: 38
Views: 2,180
0 Sundowner seat positioning
Last Post: Sportyman13
Posted On: 5 Hours Ago
Replies: 32
Views: 3,353
0 gerotor pump details
Last Post: brucstoudt
Posted On: 5 Hours Ago
Replies: 12
Views: 434
0 Zippers 1250 kit
Last Post: 60Gunner
Posted On: 6 Hours Ago
Replies: 18
Views: 1,499
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 6 Hours Ago
Replies: 26,077
Views: 2,678,586
0 Battery
Last Post: rocketmangb
Posted On: 7 Hours Ago
Replies: 3
Views: 88
0 Gas tank rust!
Last Post: Piemonte
Posted On: 8 Hours Ago
Replies: 27
Views: 1,413
0 new from socal
Last Post: Folkie
Posted On: 8 Hours Ago
Replies: 15
Views: 217
0 Craiglist finds
Last Post: rokytnji
Posted On: 9 Hours Ago
Replies: 9
Views: 1,954
0 What did you do for your sporty Today?
Last Post: Tim The Grim
Posted On: 10 Hours Ago
Replies: 7,466
Views: 1,128,544
More...
Members Birthdays
Reply
 
Share Thread Tools Display Modes
  #1  
Old 9th January 2020
Scott Scott is offline
Chief Master Mechanic
 
Join Date: Oct 2018
Posts: 464
Sportster/Buell Model: XL racebike in progress
Sportster/Buell Year: 1981
Sportster/Buell Model #2: Sportster with sidecar
Sportster/Buell Year #2: 2001
Other Motorcycle Model: Moto Guzzi V11 Lemans
Other Motorcycle Year: 2002
Reputation: 156985
Scott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant future
Default Crankcase venting

I'm thinking ahead. Roadrace rules require all vents to plumb into a catch can, with the catch can dumping into a belly pan in the event it overflows. I'd like to do away with that.

Is there any reason I can't take the 3/8" vent hose coming off the front of the cam cover, use a "T" fitting, and plumb it into the oil return going into the tank? I would do something similar with the 1/4" barbed vent on the cam cover and the smaller vent on the top rear of the cases.

This would eliminate a catch bottle moving around or falling off. I hose clamped a plastic water bottle to my Can Am roadracer frame downtube, and it rotated to melt against my pipe. Fortunately, there was no oil in it. I'd like to avoid something similar.
Reply With Quote
  #2  
Old 10th January 2020
60Gunner's Avatar
60Gunner 60Gunner is offline
Master Custom Bike Builder
 
Join Date: Sep 2017
Location: United States
Posts: 3,048
Sportster/Buell Model: 1200/1250C
Sportster/Buell Year: 05
Reputation: 3315981
60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute
Default

You're not venting then. Putting it right back in the crankcase. Not good. You'll be blowing gaskets.
Reply With Quote
  #3  
Old 10th January 2020
Ferrous Head's Avatar
Ferrous Head Ferrous Head is offline
Blind Owl
 
Join Date: Jun 2009
Location: Sunshine Coast
Posts: 6,300
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: 1662579
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

The main reason they don't want you venting directly to the atmosphere is, in the event of a serious engine failure the crank cases can become pressurized and blow a large amount of oil out the vent tube.

The best way to approach this is to use a PCV valve and dump into a ctach tank. Look at this as part of the race bike, not some add on your forced to do.

On my old Ducati Singles I actually vented into the frame itself.

On my sidecar I use a professional tank I bought from a race car supply store for about $50.
__________________
"I know only too well the evil that I propose. But my inclinations get the better of me."
Reply With Quote
  #4  
Old 10th January 2020
RicThompson RicThompson is offline
Chief Master Mechanic
 
Join Date: Sep 2019
Posts: 456
Sportster/Buell Model: XLH
Sportster/Buell Year: 1969
Other Motorcycle Model: 111 Ironhorse Outlaw
Other Motorcycle Year: 2004
Reputation: 118936
RicThompson has much to be proud ofRicThompson has much to be proud ofRicThompson has much to be proud ofRicThompson has much to be proud ofRicThompson has much to be proud ofRicThompson has much to be proud ofRicThompson has much to be proud ofRicThompson has much to be proud ofRicThompson has much to be proud ofRicThompson has much to be proud ofRicThompson has much to be proud of
Default

I'm not a road racer. I'm a mechanic. The factory puts the crankcase breather into the air filter box. If you are running a air filter in a box can you put a small vented bottle in the air filter box? That would allow air to recirculate with some or most of the residue collecting in the concealed catch bottle. Just a thought.
Reply With Quote
  #5  
Old 10th January 2020
Scott Scott is offline
Chief Master Mechanic
 
Join Date: Oct 2018
Posts: 464
Sportster/Buell Model: XL racebike in progress
Sportster/Buell Year: 1981
Sportster/Buell Model #2: Sportster with sidecar
Sportster/Buell Year #2: 2001
Other Motorcycle Model: Moto Guzzi V11 Lemans
Other Motorcycle Year: 2002
Reputation: 156985
Scott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant future
Default

I've seen catch bottles fill and then dump onto the track, which never earns you any friends. Now we have to have a tray under the engine lined with absorbent material, and a hose running from the top of the catch can into the tray. I want to use a PCV valve but don't know what to look for. Auto parts store don't have them on display with dimensions. Can anyone suggest an application or part number for a PCV valve with 3/8" barbs (or male hose connections) on both ends? That, or a website that lists them by dimensions? The club just strengthened the rules for catch cans. No more soda bottles.


Quote:
Originally Posted by Ferrous Head View Post
The main reason they don't want you venting directly to the atmosphere is, in the event of a serious engine failure the crank cases can become pressurized and blow a large amount of oil out the vent tube.

The best way to approach this is to use a PCV valve and dump into a ctach tank. Look at this as part of the race bike, not some add on your forced to do.

On my old Ducati Singles I actually vented into the frame itself.

On my sidecar I use a professional tank I bought from a race car supply store for about $50.
Reply With Quote
  #6  
Old 10th January 2020
60Gunner's Avatar
60Gunner 60Gunner is offline
Master Custom Bike Builder
 
Join Date: Sep 2017
Location: United States
Posts: 3,048
Sportster/Buell Model: 1200/1250C
Sportster/Buell Year: 05
Reputation: 3315981
60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute
Default

https://www.haydensm6.com/kvp.htm
Specifically the KVP38.
Don't believe the hp claims but otherwise it does what it says.
I run mine out of the cam chest. You could easily mount a breathable can on the front tube.

Last edited by 60Gunner; 10th January 2020 at 02:33..
Reply With Quote
  #7  
Old 10th January 2020
Ferrous Head's Avatar
Ferrous Head Ferrous Head is offline
Blind Owl
 
Join Date: Jun 2009
Location: Sunshine Coast
Posts: 6,300
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: 1662579
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

Our rules stipulate a minimum size. It's now 500 cc's (I think !)

I use one from an XLCR on my sidecar. Makes the whole job pretty easy.
Reply With Quote
  #8  
Old 10th January 2020
1Scooter 1Scooter is offline
Master Mechanic
 
Join Date: Jun 2016
Posts: 277
Sportster/Buell Model: XLH1000
Sportster/Buell Year: 1977
Sportster/Buell Model #2: 2004 XLH1200Custom
Other Motorcycle Model: 2007 FXDB
Other Motorcycle Year: 2004
Reputation: 58648
1Scooter is a splendid one to behold1Scooter is a splendid one to behold1Scooter is a splendid one to behold1Scooter is a splendid one to behold1Scooter is a splendid one to behold1Scooter is a splendid one to behold1Scooter is a splendid one to behold1Scooter is a splendid one to behold1Scooter is a splendid one to behold1Scooter is a splendid one to behold1Scooter is a splendid one to behold
Default

Look for a turbo Mercedes check valve, not a PCV valve. Basically you need a setup similar to the 77-78 Foo Foo valve venting to a barf bucket. Sorry but I can't remember the part number.
Reply With Quote
  #9  
Old 10th January 2020
Scott Scott is offline
Chief Master Mechanic
 
Join Date: Oct 2018
Posts: 464
Sportster/Buell Model: XL racebike in progress
Sportster/Buell Year: 1981
Sportster/Buell Model #2: Sportster with sidecar
Sportster/Buell Year #2: 2001
Other Motorcycle Model: Moto Guzzi V11 Lemans
Other Motorcycle Year: 2002
Reputation: 156985
Scott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant future
Default

Here's what I found. Thanks to 60gunner, but I'm far too cheap to pay $124 for what would cost a fraction of that if it were for a car. Summit sells an inline Russell check valve, item no. 650613 which would work great at $35.99, but it has male 8 AN fittings on both ends. All is not lost, as Summit sells an 8 AN to 3/8" hose adaptor for $4.49 each (Derale AN Swivel Hose Barb Fittings 98201). I'm not entirely sure of the difference between a check valve and PCV valve. I just want a valve that allows pressure to flow one way and not the other.
Reply With Quote
  #10  
Old 10th January 2020
Hippysmack's Avatar
Hippysmack Hippysmack is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2014
Posts: 6,679
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

It's a bad idea to use one built for a car.
The vacuum in the crankcase is different and they are need specific.
It's best to buy one that is built for a Harley.

It be interesting to find some of you race guys that have knowledge of at what RPM your engine goes from vacuum to positive pressure.
That is when you are liable to puke oil out the breather vent.
I've done some testing on mine, albeit without load.
Using a homemade slack tube, I went positive around 5000 rpm.
With a digital manometer hooked to the oil cap, you may be able to fine tune your breathing system to avoid as much puking as possible.

Gunner, do you remember that cheap knock-off Hayden valve?
I can't remember who has it at the moment.

Here is some of what I've been doing (down with with a bad stator but not done yet).

http://xlforum.net/forums/showthread...073932&page=82

5000 RPM:
__________________
Reference the XLFORUM'S Sportsterpedia for additional technical information & advice

In Search of Fuel, Sunshine and a Steady Idle.
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 05:17.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC