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 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Graywolf
Posted On: 1 Minute Ago
Replies: 41,794
Views: 6,441,920
0 Frame mods
Last Post: farmall
Posted On: 9 Minutes Ago
Replies: 1
Views: 127
0 Might as well join I guess...
Last Post: juzyHD
Posted On: 21 Minutes Ago
Replies: 18
Views: 724
0 '71 XLCH owner in Roanoke, VA
Last Post: juzyHD
Posted On: 22 Minutes Ago
Replies: 12
Views: 568
0 Rocker Lockers - Quiet Down Annoying Top End Ticking
Last Post: Nibelungen
Posted On: 25 Minutes Ago
Replies: 43
Views: 6,397
0 "S" model specific Q&A
Last Post: Tomt
Posted On: 26 Minutes Ago
Replies: 1,801
Views: 342,804
14 Where do you store your Sportster over the winter?
Last Post: r4fthrs
Posted On: 29 Minutes Ago
Replies: 46
Views: 2,006
0 07 heads on 04 rubbermount
Last Post: hbsporty
Posted On: 39 Minutes Ago
Replies: 28
Views: 638
0 Engine breather 101 / Crankcase vent 101
Last Post: 83XLX
Posted On: 45 Minutes Ago
Replies: 155
Views: 57,321
0 1995 Sportster 1200, Black/orange, S&S, Supertrapp
Last Post: harley506d
Posted On: 48 Minutes Ago
Replies: 6
Views: 60
0 What Sort Of Sporty Have You Got?
Last Post: Condor
Posted On: 1 Hour Ago
Replies: 1,044
Views: 274,125
0 Suzuki Lights On 883
Last Post: IXL2Relax
Posted On: 1 Hour Ago
Replies: 38
Views: 887
0 Replacing Front brake switch
Last Post: rokytnji
Posted On: 1 Hour Ago
Replies: 4
Views: 36
0 October 13th - Ironhead Rider Gathering: PA/NJ (Fall 2018 G.B.B.)
Last Post: thefrenchowl
Posted On: 1 Hour Ago
Replies: 29
Views: 1,648
0 New Freewheeler On The Way
Last Post: debster
Posted On: 1 Hour Ago
Replies: 10
Views: 322
0 2019 Suzuki Katana
Last Post: Nibelungen
Posted On: 1 Hour Ago
Replies: 10
Views: 198
0 Another spark plug question...
Last Post: GA_Ironhead
Posted On: 2 Hours Ago
Replies: 10
Views: 297
0 Hot Chicks on Hot Bikes
Last Post: Stairman
Posted On: 3 Hours Ago
Replies: 9,270
Views: 1,413,813
0 Show your bike next to a lake
Last Post: Nibelungen
Posted On: 3 Hours Ago
Replies: 196
Views: 33,547
0 Lets see your off season builds
Last Post: Tinz
Posted On: 3 Hours Ago
Replies: 1,125
Views: 119,996
0 Electrical problem - won't start, infamous solo click
Last Post: sportsterdoc
Posted On: 4 Hours Ago
Replies: 20
Views: 2,386
0 Occasionally pops out of 2nd
Last Post: doodah man
Posted On: 4 Hours Ago
Replies: 1
Views: 61
0 I have a problem with my sportster. (Intermittent Starting Problem)
Last Post: sportsterdoc
Posted On: 5 Hours Ago
Replies: 14
Views: 773
0 INNOVV K2 motorcycle DVR
Last Post: Ocgreenmachine
Posted On: 5 Hours Ago
Replies: 2
Views: 103
0 Another ironhead roadracer
Last Post: mrmom9r
Posted On: 6 Hours Ago
Replies: 17
Views: 551
0 What did you do for your sporty Today?
Last Post: SLW210
Posted On: 6 Hours Ago
Replies: 5,441
Views: 620,062
0 Hello From San Diego
Last Post: hoggy
Posted On: 7 Hours Ago
Replies: 13
Views: 282
0 Hello xlforum
Last Post: hoggy
Posted On: 7 Hours Ago
Replies: 12
Views: 521
0 Hello from Clarksville, TN
Last Post: hoggy
Posted On: 7 Hours Ago
Replies: 14
Views: 521
More...
Members Birthdays
jackson91 (49), TheLAW (43), tat2cj, C_Ranger (29), XL Kenny (26)
Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #11  
Old 14th July 2018
chevelle's Avatar
chevelle chevelle is online now
Senior Custom Bike Builder
 
Join Date: Sep 2007
Posts: 2,830
Sportster/Buell Model: Custom Sputhe XR
Sportster/Buell Year: 19**
Sportster/Buell Model #2: XLCH
Sportster/Buell Year #2: 1965
Reputation: 41766
chevelle is a splendid one to beholdchevelle is a splendid one to beholdchevelle is a splendid one to beholdchevelle is a splendid one to beholdchevelle is a splendid one to beholdchevelle is a splendid one to beholdchevelle is a splendid one to beholdchevelle is a splendid one to beholdchevelle is a splendid one to beholdchevelle is a splendid one to beholdchevelle is a splendid one to behold
Default

This thread may be handy
http://xlforum.net/forums/showthread.php?t=1503001
Reply With Quote
  #12  
Old 14th July 2018
davixlrtt's Avatar
davixlrtt davixlrtt is offline
Chief Master Mechanic
 
Join Date: Nov 2009
Posts: 456
Sportster/Buell Model: 1965 xlch
Sportster/Buell Model #2: 1992 Honda xlr250r
Other Motorcycle Model: 1986 suzuki gsxr 750.
Reputation: 10861
davixlrtt is a glorious beacon of lightdavixlrtt is a glorious beacon of lightdavixlrtt is a glorious beacon of lightdavixlrtt is a glorious beacon of lightdavixlrtt is a glorious beacon of lightdavixlrtt is a glorious beacon of lightdavixlrtt is a glorious beacon of lightdavixlrtt is a glorious beacon of lightdavixlrtt is a glorious beacon of lightdavixlrtt is a glorious beacon of lightdavixlrtt is a glorious beacon of light
Default

You can use shims between the lower collar and the guide shoulder when setting up spring coil bind, Dr. Dick has even suggested this. I don’t think it should present any issues.
.....Davi.
Reply With Quote
  #13  
Old 14th July 2018
yoshi's Avatar
yoshi yoshi is offline
Master Mechanic
 
Join Date: Dec 2011
Location: Birmingham UK
Posts: 274
Sportster/Buell Model: XLCH
Sportster/Buell Year: 1971
Sportster/Buell Model #2: FXRS-SP
Sportster/Buell Year #2: 1985
Reputation: 124780
yoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud of
Default

Quote:
Originally Posted by needspeed View Post
In late '83 (I think) harley changed the design of the guides, springs and lower collar. The guides have no shoulder, The lower collar looks like a flat washer and makes more room for the new springs that are longer and stronger. The -81 part number you asked about is probably the new collar. The new springs shouldn't be used with the old collar.
The 83 lower collar for the shoulderless guides have a -83 part number.

Quote:
Originally Posted by chevelle View Post
Thanks Chevelle. I found your thread while I was searching. Dirty Cory's 78 rebuild thread also has a lot of usefull info.
Reply With Quote
  #14  
Old 14th July 2018
yoshi's Avatar
yoshi yoshi is offline
Master Mechanic
 
Join Date: Dec 2011
Location: Birmingham UK
Posts: 274
Sportster/Buell Model: XLCH
Sportster/Buell Year: 1971
Sportster/Buell Model #2: FXRS-SP
Sportster/Buell Year #2: 1985
Reputation: 124780
yoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud ofyoshi has much to be proud of
Default

I've stripped the heads this afternoon and measured everything and it would seem that the answers will be straight forward.

Before stripping I measured the installed spring height. They measured front inlet 1.175", front exhaust 1.25", rear inlet 1.234 and rear exhaust 1.2"

All lower collars had shims fitted under them, I did remember removing some when I stripped the heads originally, only came back to me when I saw them again. The shims were 25 thou thick and there were 2 each under the front exhaust and rear inlet, the other two collars had 3 shims each. I can't remember how many shims I removed originally so I'm unsure whether the head builder just put back what I'd taken out.

I measured the depth of the recess under the lower collar and the height of the flange on the valve guide to the machined surface. These were for the collars FI 0.090" FE 0.099" RI 0.105" and RE 0.100".
The valve guide flange/shoulder heights were FI 0.125" FE 0.100" RI 0.105 and RE 0.111".

The outer spring coil bind measured FI 0.800 FE 0.768 RI 0.765 and RE 0.765.

Other than the Wiseco pistons this engine is stock 1980 even down to Q cams so why it has non stock valve springs I'm not sure.

If my calculations are correct then the front inlet would need a minimum installed height of 1.240 to avoid coil bind (0.800" for the valve + 0.400 cam lift + 0.040 clearance ).

I have some PB+ cams to go in next winter so if my maths is correct then doing away with the shims should give me the required clearance. I'd be glad to hear peoples thoughts.
Reply With Quote
  #15  
Old 14th July 2018
bustert's Avatar
bustert bustert is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2008
Posts: 8,454
Sportster/Buell Model: 1200s
Sportster/Buell Year: 2001
Sportster/Buell Model #2: xlch
Sportster/Buell Year #2: 1974
Reputation: 1323806
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

there are plenty of engines that the lower collar does not sit on the head.
if it were mine, which i already have done to my 74ch, is run back to stock spec. start with stelite seats, from there, all new, you want it to be a long lasting repair so why cheap out. why fool with shims, get a good set of springs.
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



Sponsored Links
All times are GMT +1. The time now is 21:33.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC