The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE ZONE > 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 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 1 Minute Ago
Replies: 7,010
Views: 499,643
0 Hot Rods, Rat Rods, and Customs.
Last Post: Stairman
Posted On: 3 Minutes Ago
Replies: 2,493
Views: 190,445
0 Roads I'd like to ride.
Last Post: Stairman
Posted On: 6 Minutes Ago
Replies: 68
Views: 3,301
0 79 Engine Rebuild
Last Post: Peteroo
Posted On: 10 Minutes Ago
Replies: 38
Views: 1,638
0 ....1
Last Post: bplinson
Posted On: 17 Minutes Ago
Replies: 4,500
Views: 207,900
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Stairman
Posted On: 21 Minutes Ago
Replies: 40,862
Views: 6,264,493
0 hey y'all
Last Post: Stairman
Posted On: 27 Minutes Ago
Replies: 1
Views: 17
0 :( New deep rebuild on my 90 inch
Last Post: conv90
Posted On: 47 Minutes Ago
Replies: 71
Views: 6,197
0 Issue that has me stumped
Last Post: 60Gunner
Posted On: 51 Minutes Ago
Replies: 34
Views: 1,201
0 wtb cam cover and primary cover for 2003 sportster
Last Post: painterdude923
Posted On: 1 Hour Ago
Replies: 0
Views: 13
0 Crusty's Travels
Last Post: gravydog
Posted On: 1 Hour Ago
Replies: 1,463
Views: 144,380
0 Any K model guys interested in cam regrinding?
Last Post: sevenyears of famine
Posted On: 1 Hour Ago
Replies: 134
Views: 9,080
0 Where to buy auto advance weights
Last Post: AkIronheadparty
Posted On: 2 Hours Ago
Replies: 0
Views: 28
0 You asked for it! "The Tess' Coffee Thread"
Last Post: Flame__
Posted On: 2 Hours Ago
Replies: 10,176
Views: 645,638
0 Satisfied Hammer Performance Customers
Last Post: rider61
Posted On: 2 Hours Ago
Replies: 127
Views: 40,965
0 Anyone go racing last weekend?
Last Post: cycowrencher
Posted On: 2 Hours Ago
Replies: 2,625
Views: 235,773
0 Big bore stroker - the beginning of a 10-year long build
Last Post: kaveebee
Posted On: 3 Hours Ago
Replies: 696
Views: 58,804
0 Which cam?/ 551 or 570/Why?
Last Post: Turbo Sporty 48
Posted On: 3 Hours Ago
Replies: 10
Views: 358
0 C.O.B.B run west
Last Post: sportsterpaul
Posted On: 3 Hours Ago
Replies: 107
Views: 6,998
0 Electronic jet kit
Last Post: Folkie
Posted On: 4 Hours Ago
Replies: 4
Views: 215
6 SPORTY BOBBER PICTURES
Last Post: Folkie
Posted On: 4 Hours Ago
Replies: 5,998
Views: 5,302,927
0 Best Riding/Motorcycle Memes-Let's see 'em!
Last Post: sportytrace
Posted On: 4 Hours Ago
Replies: 173
Views: 23,375
0 Who can make a spare key?
Last Post: chris16371
Posted On: 4 Hours Ago
Replies: 13
Views: 464
0 My take on the world ~ Photo by Trace
Last Post: sportytrace
Posted On: 4 Hours Ago
Replies: 761
Views: 79,481
0 Primary/transmission synthetic oil
Last Post: Four Speed
Posted On: 6 Hours Ago
Replies: 9
Views: 169
0 How many miles are on your sporty?
Last Post: lucifer_mr2
Posted On: 7 Hours Ago
Replies: 1,125
Views: 250,845
0 Clutch Spring plate poll
Last Post: r4fthrs
Posted On: 8 Hours Ago
Replies: 262
Views: 46,976
0 How old are you?
Last Post: RandyMac
Posted On: 8 Hours Ago
Replies: 188
Views: 13,191
0 2 Up Seat Recommendations
Last Post: ReddTigger
Posted On: 10 Hours Ago
Replies: 11
Views: 289
More...
Members Birthdays
Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #11  
Old 2 Days Ago
chevelle's Avatar
chevelle chevelle is offline
Senior Custom Bike Builder
 
Join Date: Sep 2007
Posts: 2,805
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 2 Days Ago
davixlrtt's Avatar
davixlrtt davixlrtt is offline
Chief Know It All
 
Join Date: Nov 2009
Posts: 428
Sportster/Buell Model: 1965 xlch
Sportster/Buell Model #2: 1992 Honda xlr250r
Other Motorcycle Model: 1986 suzuki gsxr 750.
Reputation: 9121
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 2 Days Ago
yoshi's Avatar
yoshi yoshi is offline
Master Mechanic
 
Join Date: Dec 2011
Location: Birmingham UK
Posts: 268
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 2 Days Ago
yoshi's Avatar
yoshi yoshi is offline
Master Mechanic
 
Join Date: Dec 2011
Location: Birmingham UK
Posts: 268
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 2 Days Ago
bustert's Avatar
bustert bustert is offline
XL FORUM TEAM MEMBER
 
Join Date: Jul 2008
Posts: 8,181
Sportster/Buell Model: 1200s
Sportster/Buell Year: 2001
Sportster/Buell Model #2: xlch
Sportster/Buell Year #2: 1974
Reputation: 1245114
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 16:31.


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