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 1970 XLH Tach cable kinked
Last Post: Rolschnee
Posted On: 24 Minutes Ago
Replies: 19
Views: 760
0 Canadians for sturgis 2021
Last Post: Knuckles
Posted On: 34 Minutes Ago
Replies: 7
Views: 293
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Stairman
Posted On: 35 Minutes Ago
Replies: 50,343
Views: 8,264,847
0 Fuse Box Pictures Wanted
Last Post: Blacky
Posted On: 52 Minutes Ago
Replies: 15
Views: 1,921
0 Exhaust paint, coatings for head pipes?
Last Post: John Harper
Posted On: 53 Minutes Ago
Replies: 3
Views: 110
0 2009 883 Wheel Issue
Last Post: Blacky
Posted On: 1 Hour Ago
Replies: 11
Views: 463
0 Food porn
Last Post: Stairman
Posted On: 1 Hour Ago
Replies: 2,302
Views: 499,151
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 1 Hour Ago
Replies: 28,386
Views: 3,018,178
0 Iron 1966 XLRTT
Last Post: Model H
Posted On: 2 Hours Ago
Replies: 185
Views: 42,105
0 New here - compression test produced meh results.
Last Post: sungod
Posted On: 2 Hours Ago
Replies: 25
Views: 1,325
0 1970 XLH smoke from rocker box gasket
Last Post: sungod
Posted On: 2 Hours Ago
Replies: 9
Views: 178
0 S&S Super B help
Last Post: sungod
Posted On: 2 Hours Ago
Replies: 7
Views: 256
0 Non-Starter, Compression Test Results
Last Post: Gravitas
Posted On: 3 Hours Ago
Replies: 17
Views: 730
0 Swing arm bearing change
Last Post: SportsterXLCH1967
Posted On: 4 Hours Ago
Replies: 5
Views: 241
0 Hot Rods, Rat Rods, and Customs.
Last Post: cal43
Posted On: 5 Hours Ago
Replies: 4,475
Views: 736,587
0 Peanut, 3.3 or 4.5 gas tank ?
Last Post: IXL2Relax
Posted On: 6 Hours Ago
Replies: 261
Views: 79,376
0 2018 Iron 1275 Project
Last Post: yelladox
Posted On: 8 Hours Ago
Replies: 29
Views: 3,337
0 Homemade Lithium Battery
Last Post: t120r
Posted On: 8 Hours Ago
Replies: 26
Views: 642
0 What to do now? Ironhead clutch hub nut stripped
Last Post: Firefight
Posted On: 8 Hours Ago
Replies: 5
Views: 264
0 1968 ex barn dweller thread
Last Post: fernf5
Posted On: 9 Hours Ago
Replies: 151
Views: 12,849
0 Hammer 1275 clang noise, slow oil feed, kinked crankcase vent.
Last Post: rocketmangb
Posted On: 10 Hours Ago
Replies: 438
Views: 14,347
0 Steering Neck Tapered Bearin Kit
Last Post: mikethebike61
Posted On: 11 Hours Ago
Replies: 0
Views: 59
0 WTB 04-06 intake manifold
Last Post: rocketmangb
Posted On: 11 Hours Ago
Replies: 2
Views: 121
0 Swingarm Fitment
Last Post: Blacky
Posted On: 12 Hours Ago
Replies: 0
Views: 63
0 yost power tube guy
Last Post: cazz1000
Posted On: 12 Hours Ago
Replies: 92
Views: 5,030
0 S&S Super E
Last Post: CMCSSeabee
Posted On: 12 Hours Ago
Replies: 14
Views: 717
0 Magneto Sportster's 1964 XLH Restoration Project
Last Post: Magneto Sportster
Posted On: 12 Hours Ago
Replies: 52
Views: 6,946
0 Lets see your off season builds
Last Post: cycowrencher
Posted On: 13 Hours Ago
Replies: 1,676
Views: 250,122
0 I made a oopsie
Last Post: robbie202
Posted On: 13 Hours Ago
Replies: 4
Views: 167
0 RIP Trainman
Last Post: Ireeman
Posted On: 14 Hours Ago
Replies: 29
Views: 1,239
More...
Members Birthdays
WinXP (70), Maggie (64), grancan1 (56), SRKASM (50), metalmessiah, o113attitude (46), stinkynate (38), wingman_214 (37)
Reply
 
Share Thread Tools Display Modes
  #1  
Old 2 Weeks Ago
spiritof67 spiritof67 is offline
Biker
 
Join Date: Jan 2012
Posts: 76
Sportster/Buell Model: XLCR
Sportster/Buell Year: 1977
Reputation: 33040
spiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to behold
Default XLCR Rotors

I am looking into upgrading the front brake setup on my rider XLCR. The PM 4-piston caliper/cast iron disc setup I'm using is better than stock but marginal in the real world. It needs larger diameter discs. Has anyone run larger rotors on the '77 style wheel who can advise me? No lifestyle advice ("Ride it slower") please.
Reply With Quote
  #2  
Old 2 Weeks Ago
84rzv500r 84rzv500r is offline
XL FORUM TEAM MEMBER
 
Join Date: Jun 2008
Location: On a big rock in the Florida Straights
Posts: 207
Sportster/Buell Model: XLH 1200 S
Sportster/Buell Year: 1999
Sportster/Buell Model #2: XR-1000
Sportster/Buell Year #2: 83
Other Motorcycle Model: RZV500R/R1 hybrid
Other Motorcycle Year: 1984
Reputation: 159533
84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future
Default

iron? IIRC XLCR rotors are stainless steel... ductile iron would be a good upgrade even at the same diameter 10"??... what is the weight bias on your front end? have you dropped the forks in the triple trees? more aggressive compound on the pads? stickier front tire? braided stainless lines? new brake fluid?
__________________
----
1999 1200 Sport, SE 7500 ignition, SE air filter, DynoJet , Cone Engineering 2:1 pipe, Storz Steering damper, Russel Mach 3 Stainless Lines, VROD 4 piston front calipers, Bates Baja tires, XR1200 perf shocks, forks and triples coming very soon...

1983 XR-1000S to XR-1000RX Project Build Thread
Reply With Quote
  #3  
Old 2 Weeks Ago
ryder rick's Avatar
ryder rick ryder rick is offline
Senior Master Custom Bike Builder
 
Join Date: Jun 2008
Location: Cornelius, OR
Posts: 9,625
Reputation: 1215694
ryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond reputeryder rick has a reputation beyond repute
Default

Harley oversizes the front master cylinder in an attempt to keep inexperienced riders from locking the front wheel.

I would not run a stainless rotor they are for show bikes, brakes are not a place for compromises.
Stainless rotors are particular about what pads you use, so maybe check on different compounds before breaking the piggy bank open.
__________________
Ryder Rick "I know right from wrong, but sometimes, wrong feels right"
Reply With Quote
  #4  
Old 2 Weeks Ago
spiritof67 spiritof67 is offline
Biker
 
Join Date: Jan 2012
Posts: 76
Sportster/Buell Model: XLCR
Sportster/Buell Year: 1977
Reputation: 33040
spiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to behold
Default XLCR Rotors

84RZV5000R, the PM rotors are ductile iron; I already have installed HH pads; I already have braided lines; and I have changed brake fluid numerous times. The simple fact is that the available swept area of 10" discs simply isn't sufficient to make it truly safe to ride in 21st Century conditions. That's why I'm trying to find larger diameter discs (hopefully EBC or similar swap-out) so I can mount larger and better calipers. Sadly, HD decided to unify the master cylinder and handlebar controls (stylish!) so I am stuck with the stock master.

By the way, how's that Yamaha? Steel frame or aluminum?
Reply With Quote
  #5  
Old 2 Weeks Ago
84rzv500r 84rzv500r is offline
XL FORUM TEAM MEMBER
 
Join Date: Jun 2008
Location: On a big rock in the Florida Straights
Posts: 207
Sportster/Buell Model: XLH 1200 S
Sportster/Buell Year: 1999
Sportster/Buell Model #2: XR-1000
Sportster/Buell Year #2: 83
Other Motorcycle Model: RZV500R/R1 hybrid
Other Motorcycle Year: 1984
Reputation: 159533
84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future
Default

Quote:
Originally Posted by spiritof67 View Post
84RZV5000R, the PM rotors are ductile iron; I already have installed HH pads; I already have braided lines; and I have changed brake fluid numerous times. The simple fact is that the available swept area of 10" discs simply isn't sufficient to make it truly safe to ride in 21st Century conditions. That's why I'm trying to find larger diameter discs (hopefully EBC or similar swap-out) so I can mount larger and better calipers. Sadly, HD decided to unify the master cylinder and handlebar controls (stylish!) so I am stuck with the stock master.

By the way, how's that Yamaha? Steel frame or aluminum?
hand welded aluminum.... RZV...
Reply With Quote
  #6  
Old 2 Weeks Ago
spiritof67 spiritof67 is offline
Biker
 
Join Date: Jan 2012
Posts: 76
Sportster/Buell Model: XLCR
Sportster/Buell Year: 1977
Reputation: 33040
spiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to beholdspiritof67 is a splendid one to behold
Default XLCR Rotors

That's a great motorcycle. Suzuki decided for some reason not to go all the way with the Gamma, but Yamaha took the bit in their teeth (for one year?) and did the aluminum frame version. If I thought I could find someone to take proper care of it, I'd love to have one. Instead I have my XLCR and XR1000....
Reply With Quote
  #7  
Old 2 Weeks Ago
84rzv500r 84rzv500r is offline
XL FORUM TEAM MEMBER
 
Join Date: Jun 2008
Location: On a big rock in the Florida Straights
Posts: 207
Sportster/Buell Model: XLH 1200 S
Sportster/Buell Year: 1999
Sportster/Buell Model #2: XR-1000
Sportster/Buell Year #2: 83
Other Motorcycle Model: RZV500R/R1 hybrid
Other Motorcycle Year: 1984
Reputation: 159533
84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future84rzv500r has a brilliant future
Default

Quote:
Originally Posted by spiritof67 View Post
That's a great motorcycle. Suzuki decided for some reason not to go all the way with the Gamma, but Yamaha took the bit in their teeth (for one year?) and did the aluminum frame version. If I thought I could find someone to take proper care of it, I'd love to have one. Instead I have my XLCR and XR1000....
Gammas make more power than rz(v)'s but if you strap on 3MA TZ250 cylinders to either look out... My RZV is a hybrid with 2002 R1 forks with Ohlins internals Ohlins Shock Marchesini M5's... I was thinking about selling it... it would be a lump magnesium oxide and titanium nuggets down here in the keys inside a year... 110 At the rear wheel and 319lbs Wet... and this always gets people who think two strokes are peaky... think R1 torque



https://photos.google.com/share/AF1Q...RXX05Vekl6Q3ZB

Last edited by 84rzv500r; 2 Weeks Ago at 13:29..
Reply With Quote
  #8  
Old 2 Weeks Ago
RicThompson RicThompson is offline
Chief Harley Engineer
 
Join Date: Sep 2019
Posts: 535
Sportster/Buell Model: XLH
Sportster/Buell Year: 1969
Other Motorcycle Model: 111 Ironhorse Outlaw
Other Motorcycle Year: 2004
Reputation: 314127
RicThompson has a reputation beyond reputeRicThompson has a reputation beyond reputeRicThompson has a reputation beyond reputeRicThompson has a reputation beyond reputeRicThompson has a reputation beyond reputeRicThompson has a reputation beyond reputeRicThompson has a reputation beyond reputeRicThompson has a reputation beyond reputeRicThompson has a reputation beyond reputeRicThompson has a reputation beyond reputeRicThompson has a reputation beyond repute
Default

If you are happy with the feel of your current PM caliper/master cylinder combo and just want to increase disc size that should be simple. Find the size disc you want that will bolt to your hub, modify caliper bracket for caliper to align properly on new disc. The added disc area will improve thermal response and stopping.
Reply With Quote
  #9  
Old 2 Weeks Ago
mikethebike61's Avatar
mikethebike61 mikethebike61 is offline
Senior Custom Bike Builder
 
Join Date: Jan 2011
Location: Paradise
Posts: 2,845
Sportster/Buell Model: xlch
Sportster/Buell Year: 1977
Other Motorcycle Model: BMW K-1200/GT
Other Motorcycle Year: 2004
Reputation: 104360
mikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud of
Default

Quote:
Originally Posted by ryder rick View Post
Harley oversizes the front master cylinder in an attempt to keep inexperienced riders from locking the front wheel.

I would not run a stainless rotor they are for show bikes, brakes are not a place for compromises.
Stainless rotors are particular about what pads you use, so maybe check on different compounds before breaking the piggy bank open.
Wilwood disagrees
Brembo also disagrees

You can argue with them

Both my bikes run SS rotors
XLCH....WILWOOD
BMW.....BREMBO (STOCK OEM)

I'll put either of them up against anything in the same weight class...
__________________
If loud pipes save lives....imagine what learning to ride will do for you.
Reply With Quote
  #10  
Old 2 Weeks Ago
mikethebike61's Avatar
mikethebike61 mikethebike61 is offline
Senior Custom Bike Builder
 
Join Date: Jan 2011
Location: Paradise
Posts: 2,845
Sportster/Buell Model: xlch
Sportster/Buell Year: 1977
Other Motorcycle Model: BMW K-1200/GT
Other Motorcycle Year: 2004
Reputation: 104360
mikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud ofmikethebike61 has much to be proud of
Default

Go to WILWOOD site and look at their pads..they list a heat/coefficient of friction graph for each compound pad....I use PolyMatrix "E" pads on everything

C/F about 42-47 up to 900 degrees or so...

Used that compound on the GMC motor home and it transformed the beast..
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 13:58.


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