The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Drivetrain > Sportster Motorcycle Transmission, Clutch, Primary & Secondary Drive
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Notices

Sportster Motorcycle Transmission, Clutch, Primary & Secondary Drive Transmission, Clutch and primary or secondary drive problems, advice, and/or how tos.

Active Threads
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: cal43
Posted On: 2 Minutes Ago
Replies: 49,840
Views: 8,139,556
0 1250 Unhappiness 2020 edition
Last Post: xLoneRiderx
Posted On: 20 Minutes Ago
Replies: 28
Views: 1,341
2 Sloppy Throttle Feel
Last Post: b0fh
Posted On: 2 Hours Ago
Replies: 2
Views: 234
0 Keep & Kill
Last Post: Crusty
Posted On: 3 Hours Ago
Replies: 20,210
Views: 1,202,265
0 0Salt Flat Sporton
Last Post: harley506d
Posted On: 4 Hours Ago
Replies: 16
Views: 302
0 Upgrade proof, evidence backed, High Flow Air Filter/intake for EFI 883/1200
Last Post: d10221
Posted On: 5 Hours Ago
Replies: 75
Views: 3,892
0 Hottie of the day, no nudity.
Last Post: ronccc
Posted On: 6 Hours Ago
Replies: 27,128
Views: 2,814,434
0 Mikuni HSR42 will not idle
Last Post: rocketmangb
Posted On: 6 Hours Ago
Replies: 12
Views: 298
0 Pan American Owners Manual and accessory info
Last Post: Tomcatt
Posted On: 7 Hours Ago
Replies: 10
Views: 328
0 WTB OEM 1977 Sportster handlebars
Last Post: Big Al
Posted On: 7 Hours Ago
Replies: 0
Views: 24
0 Peanut, 3.3 or 4.5 gas tank ?
Last Post: Brad
Posted On: 7 Hours Ago
Replies: 259
Views: 76,328
0 KT - 2021 - You're In It Now
Last Post: Brad
Posted On: 7 Hours Ago
Replies: 4
Views: 724
0 This week on Craig's list
Last Post: Maxeffort
Posted On: 8 Hours Ago
Replies: 5,114
Views: 759,763
0 Want to rejet my 1989 883
Last Post: IXL2Relax
Posted On: 8 Hours Ago
Replies: 1
Views: 64
0 Mimi the Deerslayer: the triple threat
Last Post: madnss
Posted On: 8 Hours Ago
Replies: 32
Views: 1,865
4 Rear Lighting WIRING help
Last Post: IXL2Relax
Posted On: 8 Hours Ago
Replies: 1
Views: 98
3 Shaky Dave Recovery
Last Post: BitterOldMan
Posted On: 9 Hours Ago
Replies: 198
Views: 33,209
0 XL IR EFI to those that asked
Last Post: Iron Mike
Posted On: 9 Hours Ago
Replies: 104
Views: 9,973
0 Windage Tray
Last Post: Blacky
Posted On: 9 Hours Ago
Replies: 0
Views: 37
0 Poll: If you had to have a stock sporty, what would it be?
Last Post: xlerate
Posted On: 11 Hours Ago
Replies: 611
Views: 202,334
0 Corona Virus
Last Post: XL Ed
Posted On: 11 Hours Ago
Replies: 1,226
Views: 121,532
0 Woke, cancel culture...
Last Post: XL Ed
Posted On: 12 Hours Ago
Replies: 17
Views: 643
0 Rear Shock length '81
Last Post: 83XLX
Posted On: 12 Hours Ago
Replies: 13
Views: 534
0 This ever happen to you?
Last Post: bustert
Posted On: 12 Hours Ago
Replies: 16
Views: 1,019
0 Lets see your off season builds
Last Post: brucstoudt
Posted On: 12 Hours Ago
Replies: 1,608
Views: 235,541
0 Fork Brace worth the bucks???
Last Post: exexpat93
Posted On: 14 Hours Ago
Replies: 173
Views: 28,302
0 Official XLForum Poll: What kind of bars are you running?
Last Post: XL_1200C
Posted On: 14 Hours Ago
Replies: 667
Views: 168,937
0 83 XLH w/Velorex 562
Last Post: ferretface
Posted On: 14 Hours Ago
Replies: 12
Views: 822
0 The Third Version
Last Post: Blacky
Posted On: 14 Hours Ago
Replies: 10
Views: 867
0 DK Customs Air Intake
Last Post: Blacky
Posted On: 15 Hours Ago
Replies: 2
Views: 173
More...
Members Birthdays
nailhead (79), Rooster (64), chidovampiro (62), daniel (59), evereyken (58), RogueXR9OO (58)
Reply
 
Share Thread Tools Display Modes
  #1  
Old 18th December 2020
JonesL JonesL is offline
XL FORUM TEAM MEMBER
 
Join Date: Dec 2013
Posts: 674
Sportster/Buell Model: XL
Sportster/Buell Year: 1971
Reputation: 443233
JonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond repute
Default Clutch spring question

Hello and Merry Christmas to all,

While we're staying home I decided to do some clutch work on the '71 ironhead.
When I took it apart, I found that the inner and outer clutch springs were two different heights. Figuring one was collapsed, I ordered a new set and sure enough, both are the same height. Figuring I was right, I put everything back together including new steels and stock discs and aside from the clutch being a little stiffer, life is good.

Looking around to see what else is new ironhead clutch-wise, I've run across other listings for new clutch spring sets and some show two different height springs.
So what gives? Are there in fact two spring sets and if so, why the difference?
__________________
Never be afraid to try something new.
Remember, amateurs built the ark and professionals built the Titanic.
Reply With Quote
  #2  
Old 18th January 2021
DDDDylan DDDDylan is offline
Chief Harley Engineer
 
Join Date: Nov 2012
Posts: 522
Sportster/Buell Model: XLS 1000
Sportster/Buell Year: 1979
Other Motorcycle Model: CB750
Other Motorcycle Year: 1995
Reputation: 26044
DDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to all
Default

Quote:
Originally Posted by JonesL View Post
Hello and Merry Christmas to all,

While we're staying home I decided to do some clutch work on the '71 ironhead.
When I took it apart, I found that the inner and outer clutch springs were two different heights. Figuring one was collapsed, I ordered a new set and sure enough, both are the same height. Figuring I was right, I put everything back together including new steels and stock discs and aside from the clutch being a little stiffer, life is good.

Looking around to see what else is new ironhead clutch-wise, I've run across other listings for new clutch spring sets and some show two different height springs.
So what gives? Are there in fact two spring sets and if so, why the difference?
From the parts book it looks like your 1971 should have the same clutch spring part numbers as my 1979. 38080-71 inner and 38079-72 outer. The 79-85 service book gives the same guidelines for both springs:
New free length = 2.390"
Service limit free length = 2.344"

However, I have two sets of used OE clutch springs here and the inners are shorter than the outers.
Inners = 2.313-2.344
Outers = ~2.625
__________________
1979 XLS, '76 Keihin butterfly carb, Ultima ignition, Andrews C ratio gears
Reply With Quote
  #3  
Old 18th January 2021
DDDDylan DDDDylan is offline
Chief Harley Engineer
 
Join Date: Nov 2012
Posts: 522
Sportster/Buell Model: XLS 1000
Sportster/Buell Year: 1979
Other Motorcycle Model: CB750
Other Motorcycle Year: 1995
Reputation: 26044
DDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to allDDDDylan is a name known to all
Default

I just realized this is in a transmission section of the forum. You might want to ask a moderator to move it into the Ironhead section and you'll get more replies.
Reply With Quote
  #4  
Old 19th January 2021
JonesL JonesL is offline
XL FORUM TEAM MEMBER
 
Join Date: Dec 2013
Posts: 674
Sportster/Buell Model: XL
Sportster/Buell Year: 1971
Reputation: 443233
JonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond repute
Default

I appreciate the information, DDD. I went with two new springs, both with the same free length dimension. Clutch is stiffer now but more positive.
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 12:28.


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