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 Tires, Wheels, and Brakes
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Sportster Motorcycle Tires, Wheels, and Brakes Discuss issues with Sportster motorcycle tires, wheels and brakes.

Active Threads
0 ....1
Last Post: Highly-Dangerous
Posted On: 39 Minutes Ago
Replies: 5,412
Views: 320,461
0 Keep & Kill
Last Post: Crusty
Posted On: 42 Minutes Ago
Replies: 17,084
Views: 984,371
0 Corona Virus
Last Post: Highly-Dangerous
Posted On: 47 Minutes Ago
Replies: 696
Views: 50,637
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Graywolf
Posted On: 1 Hour Ago
Replies: 47,463
Views: 7,572,804
0 '85 XLH 1000 Generator & Gear Neutral Switch
Last Post: Abo
Posted On: 1 Hour Ago
Replies: 2
Views: 27
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 1 Hour Ago
Replies: 19,286
Views: 1,952,121
0 Greetings from Asbury Park, NJ!
Last Post: ChinCactus
Posted On: 1 Hour Ago
Replies: 8
Views: 120
0 900cc Pistons
Last Post: mickey t
Posted On: 2 Hours Ago
Replies: 10
Views: 328
0 Andrews N4 VS Stock D or W grind cams
Last Post: tattooglisha
Posted On: 3 Hours Ago
Replies: 109
Views: 23,180
0 What brand synthetic oil do you use
Last Post: 60Gunner
Posted On: 3 Hours Ago
Replies: 493
Views: 123,005
0 Le Pera seats in Australia
Last Post: BSA Bob
Posted On: 5 Hours Ago
Replies: 0
Views: 41
0 Hot Chicks on Hot Bikes
Last Post: RDHenley
Posted On: 7 Hours Ago
Replies: 10,786
Views: 2,036,592
5 Terminology Sticky?
Last Post: commando57
Posted On: 7 Hours Ago
Replies: 76
Views: 20,710
0 Transformer XR1200
Last Post: Davo_137
Posted On: 8 Hours Ago
Replies: 345
Views: 37,243
0 V&H Short Shots Pipe Test - Mild 1250
Last Post: RDHenley
Posted On: 8 Hours Ago
Replies: 56
Views: 16,868
0 No oil flow
Last Post: Hippysmack
Posted On: 9 Hours Ago
Replies: 7
Views: 89
0 Iree's late night cafe
Last Post: sportytrace
Posted On: 9 Hours Ago
Replies: 1,551
Views: 205,895
0 Crank Seal Missing; Is My Engine Damaged?
Last Post: MkC
Posted On: 9 Hours Ago
Replies: 10
Views: 285
0 HFSM refusing to disarm; urban spot (one solution)
Last Post: SwissXL
Posted On: 9 Hours Ago
Replies: 0
Views: 52
2 Your daily tunes...
Last Post: RDHenley
Posted On: 9 Hours Ago
Replies: 43
Views: 5,872
0 79 Ironhead with gear grinding start problem
Last Post: batchman
Posted On: 9 Hours Ago
Replies: 1
Views: 39
0 Anyone carry a gun while riding ?
Last Post: SwissXL
Posted On: 9 Hours Ago
Replies: 470
Views: 86,451
0 Highway cruise speed
Last Post: SwissXL
Posted On: 9 Hours Ago
Replies: 7
Views: 345
0 short chrome sissy bar with pad, but bolt on, not quick detach.
Last Post: Kenb
Posted On: 9 Hours Ago
Replies: 26
Views: 1,957
0 Getting Hammered
Last Post: Bryan83taco
Posted On: 9 Hours Ago
Replies: 131
Views: 16,320
0 Willi is back!!!!
Last Post: decman
Posted On: 10 Hours Ago
Replies: 20
Views: 27,554
0 Spark plugs another oddity. On 68 magneto
Last Post: Oldmxdog61u
Posted On: 10 Hours Ago
Replies: 23
Views: 889
0 Problem on a trip
Last Post: IXL2Relax
Posted On: 10 Hours Ago
Replies: 14
Views: 245
0 chrome xlch bosch regulator cover
Last Post: 1968xlch900
Posted On: 10 Hours Ago
Replies: 2
Views: 56
0 2004 ICM
Last Post: IXL2Relax
Posted On: 10 Hours Ago
Replies: 23
Views: 2,264
More...
Members Birthdays
Tags
39mm, dual discs, front end, spacing, upgrade

Reply
 
Share Thread Tools Display Modes
  #1  
Old 6th April 2020
shrimp shrimp is offline
XL FORUM TEAM MEMBER
 
Join Date: Oct 2013
Posts: 11
Sportster/Buell Model: XL883
Sportster/Buell Year: 1998
Reputation: 10
shrimp is an unknown quantity at this point
Default Dual Disc Conversion - Slider Clearance

I've got a 98 883, it's been neglected for a while now. I've been sitting on a pair of 99- dual disc 39mm lowers, and a pair of dual disc calipers, floating rotors and matching master cylinder - all parts I've gotten at swaps. Haven't been riding the sportster much, but decided with the quarantine that now is the time to get the hog back on the road.

Took off my old lowers and loosely assembled the new lowers (without putting in fluid/springs or bolting in the dampeners) I decided to do a test fit with the brakes mounted and put the rotors on the wheel and see how everything fits.

I noticed two things I have questions about.

First, spacing against the right slider and the rotor bolts is very tight compared to the left side. I'm using the factory wheel spacers. Is this normal? The wheel spins fine as it is.
I've tried getting inline pictures but not having luck. Here's a link to the current spacing
https://imgur.com/a/vqnvn5R




Second question: My factory axle doesn't fit into the new left side lower. The new lowers I.D. (where the axle meets) is about 0.15mm smaller than my factory lower (I've ordered proper dial calipers and telescoping gauges so I can get a more accurate measurement)
Thinking about putting the axle on a lathe and using emery paper to get it to fit - unless this is a red flag. Is it normal for tolerances to be this tight? My second thought is to use a master cylinder honing tool and try and gain that space on the fork lower, instead of taking material off the axle.

Thanks

Last edited by shrimp; 6th April 2020 at 23:20.. Reason: Add Images
Reply With Quote
  #2  
Old 7th April 2020
shrimp shrimp is offline
XL FORUM TEAM MEMBER
 
Join Date: Oct 2013
Posts: 11
Sportster/Buell Model: XL883
Sportster/Buell Year: 1998
Reputation: 10
shrimp is an unknown quantity at this point
Default

I've continued to try and figure this out. My FSM does NOT have any details on dual disc brakes. I eventually found this post http://xlforum.net/forums/showpost.php?p=3022954&postcount=9

It seems that there are different instructions for dual discs, including mention of a 7/16th drill bit to ensure brake rotor alignment.

Anyone have a copy of a manual that has these instructions and could snap a pic?
Reply With Quote
  #3  
Old 8th April 2020
sportsterpaul's Avatar
sportsterpaul sportsterpaul is offline
XL FORUM TEAM MEMBER
 
Join Date: Jan 2009
Location: In a swamp/Michigan
Posts: 14,354
Sportster/Buell Model: XL1460C
Sportster/Buell Year: 2000
Sportster/Buell Model #2: XL1200R
Sportster/Buell Year #2: 2006
Other Motorcycle Model: XL1200R
Other Motorcycle Year: 2004
Reputation: 11443428
sportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond reputesportsterpaul has a reputation beyond repute
Default

That drill bit slips into the hole near the end of the axle, it butts up against the flat on the bottom of the slider to give you proper clearancing.
__________________
I.B.A.#26543, Growing old-Mandatory/ Growing up-optional. Men do not quit playing because they get old, they get old because they stop playing!

The XL Forum Sportsterpedia:
http://sportsterpedia.com/doku.php/start
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 12:43.


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