The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Suspension, Frame, Forks, Handlebars, Fuel Tank, Oil Tank, Fenders
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Notices

Sportster Motorcycle Suspension, Frame, Forks, Handlebars, Fuel Tank, Oil Tank, Fenders Discuss Sportster Motorcycle Suspension, Frame, Forks, Handlebars, Fuel Tank, Oil Tank, Fenders problems, advice, and/or how tos.

Active Threads
0 S&s
Last Post: mikethebike61
Posted On: 1 Minute Ago
Replies: 3
Views: 145
0 Fork Brace worth the bucks???
Last Post: Tomcatt
Posted On: 1 Minute Ago
Replies: 161
Views: 25,531
0 Chasing a generator noise
Last Post: ryder rick
Posted On: 14 Minutes Ago
Replies: 7
Views: 417
0 Are There Still Sober Riders On The Forum?
Last Post: Crusty
Posted On: 20 Minutes Ago
Replies: 183
Views: 57,055
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 44 Minutes Ago
Replies: 24,412
Views: 2,495,877
0 Hot Chicks on Hot Bikes
Last Post: trainman
Posted On: 57 Minutes Ago
Replies: 11,394
Views: 2,291,164
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Stairman
Posted On: 1 Hour Ago
Replies: 48,962
Views: 7,941,850
0 Hydrostatic fuel gauge
Last Post: ferretface
Posted On: 1 Hour Ago
Replies: 2
Views: 90
0 Sifton cams on stock 74 XLCH
Last Post: doodah man
Posted On: 2 Hours Ago
Replies: 14
Views: 510
0 Keep & Kill
Last Post: Crusty
Posted On: 2 Hours Ago
Replies: 18,938
Views: 1,123,886
0 Installing jugs finally but another Q
Last Post: bustert
Posted On: 2 Hours Ago
Replies: 10
Views: 353
0 Li/Ion battery in '03
Last Post: Eric Von Zipper
Posted On: 2 Hours Ago
Replies: 12
Views: 2,137
0 Late-model stator on rigid-mount bike?
Last Post: Curbside
Posted On: 2 Hours Ago
Replies: 0
Views: 38
0 ....1
Last Post: Highly-Dangerous
Posted On: 2 Hours Ago
Replies: 5,933
Views: 341,970
0 Maxi fuse removal while runnng ..
Last Post: npaisnel
Posted On: 4 Hours Ago
Replies: 27
Views: 727
0 Iree's late night cafe
Last Post: ~Grind~
Posted On: 12 Hours Ago
Replies: 1,781
Views: 249,792
0 Which motorcycles do you wish you kept or would like to again own?
Last Post: 83XLX
Posted On: 12 Hours Ago
Replies: 37
Views: 1,377
0 1968 ex barn dweller thread
Last Post: Ferrous Head
Posted On: 14 Hours Ago
Replies: 30
Views: 772
0 Opinions on Mallory unilite ignition
Last Post: Heff
Posted On: 18 Hours Ago
Replies: 8
Views: 229
0 my sunday driver...
Last Post: 84rzv500r
Posted On: 18 Hours Ago
Replies: 37
Views: 6,399
0 Microsquirt?
Last Post: Curbside
Posted On: 18 Hours Ago
Replies: 2
Views: 175
0 Better Brakes
Last Post: RicThompson
Posted On: 19 Hours Ago
Replies: 27
Views: 1,750
0 Scrambler, Dirtster, Dual Sport , Adventure Sportster picture thread
Last Post: wedge
Posted On: 21 Hours Ago
Replies: 110
Views: 91,766
7 Ironhead yes or no
Last Post: exexpat93
Posted On: 21 Hours Ago
Replies: 37
Views: 3,872
0 Hot Rods, Rat Rods, and Customs.
Last Post: Stairman
Posted On: 22 Hours Ago
Replies: 4,305
Views: 645,812
14 It’s good to be back after 13 years...
Last Post: iBloke
Posted On: 23 Hours Ago
Replies: 18
Views: 693
0 Food porn
Last Post: Stairman
Posted On: 23 Hours Ago
Replies: 2,154
Views: 439,290
0 fork oil change with Ricor intiminators
Last Post: mikeLI_77
Posted On: 1 Day Ago
Replies: 2
Views: 116
0 New HD lithium battery issues
Last Post: npaisnel
Posted On: 1 Day Ago
Replies: 53
Views: 10,740
0 Tools
Last Post: denguy
Posted On: 1 Day Ago
Replies: 21
Views: 879
More...
Members Birthdays
wlm (57), Greg81XLH (55), saylor01 (54), Alicia (52), latnyte (51), antonini (43)
Reply
 
Share Thread Tools Display Modes
  #21  
Old 29th January 2009
XLXR's Avatar
XLXR XLXR is offline
XL FORUM LIFE MEMBER
 
Join Date: Aug 2006
Posts: 12,201
Sportster/Buell Model: XL1200 R
Sportster/Buell Year: 2006
Reputation: 711676
XLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond repute
Default

Does she already have significant riding experience on lighter bikes? Is she strong enough to keep the bike upright at parking lot speeds, especially if she accidently slides a bit on sandy or wet pavement? Can she back it out of the garage by herself? Being "a Harley guy" is no justification to place her safety at risk. I have seen too many beginning riders hurt. Well, I have also seen a lot of experienced riders hurt, but that is a different story.

I knew a guy who bought his wife a new 883 as her first bike. Then she took her motorcycle riding course on a Honda Rebel. She bought herself a new Rebel.

At 130 lbs with a frame mount bike, you need a very light spring for the shocks. The 1200S shocks have a 54/78 lb/in spring. But at 13.25" (if I remember correctly) they will need a lowering block. Read this thead:

http://xlforum.net/forums/s...d.php?t=164018

Any shocks with heavier springs will likely ride very harsh.

Colinb tried some Hagon shocks in the range you are looking for, but they used extra rubber bumpers to get them to work. I don't have the link saved.

I don't know of anyone who has tried to set up a frame mount bike for a 130 lb rider, so I can't give you specific recommendations. Changing chasis pitch can affect stability and handling. Usually, having the front end too low causes the bike to be more unstable. If you have a 180 lb rider sit on the bike with stock suspension, measure the front and rear of the frame rails in relation to the floor. Try to make your final set up settings to provide the same chassis pitch. Then be careful for the first test rides. Bump the bars at 40 mph, 45,50 etc and continue only if no wobble is noticed. I have no idea how much of a problem wobble can be in a frame mount bike.
__________________
Former Ricor test rider for IAS Shocks, Intiminators and Vibranators. Works Dual Rate fork springs, fork brace, Avon Venom X tires, loosen drive belt, and set frame rails level to floor. Read the "7 Pages of Suspension" thread in the Suspension Sticky Index to learn how to fix your suspension.

Last edited by XLXR; 29th January 2009 at 05:25..
Reply With Quote
  #22  
Old 30th January 2009
familysporty familysporty is offline
Biker
 
Join Date: Nov 2008
Posts: 34
Sportster/Buell Model: Sportster 883C w 1200 kit
Sportster/Buell Year: 1999
Other Motorcycle Model: FXR BLACK & Cam'd Out!!
Other Motorcycle Year: 1987
Reputation: 12
familysporty is an unknown quantity at this point
Default

Keeping the same pitch is a great idea....good thinkin'! Trust me, I've had my fair share of falls learning, and I don't wish that one anyone!! Thanks for all of your help, AND being a concerned forum participant!!! It is greatly appreciated!!!
Reply With Quote
  #23  
Old 5th February 2009
Atomic Punk's Avatar
Atomic Punk Atomic Punk is offline
Biker
 
Join Date: Oct 2007
Location: Dallas Ft Worth
Posts: 70
Sportster/Buell Model: XL1200C
Sportster/Buell Year: 07
Other Motorcycle Model: Road King Classic
Other Motorcycle Year: 08
Reputation: 243
Atomic Punk is on a distinguished roadAtomic Punk is on a distinguished roadAtomic Punk is on a distinguished road
Default

Had the same problem as you, except my wife was just slightly taller and slightly heavier. I have a 1200 Custom and went with a 4 pronged attack to fix the problem. It took all four items to make the bike safe and comfortable for her.

1) the cheapest and actually item that made the most difference was to have a cobbler add a inch to the bottom of her boots and a extra 1/2 inch to the heels

2) used lower blocks on the rear with stock shocks. Went with one inch blocks because was afraid of clearance problems because I retained stock shocks. Did rub a couple times when we were ridding two up

3) took seat in and had it narrowed at the nose to allow her legs to be closer together and took just a little off of the top of the seat to lower it.

4) slid forks up triple trees about one inch, also drained a little fluid out of forks but then they would bottom out occaisionlly. Bought a Progressive lower kit with new springs for the front- that lowered it about 2 inches.

After all way said and done she could flat foot the bike with a slight knee bend and back it up when needed. About $400 total
Reply With Quote
  #24  
Old 5th February 2009
XLXR's Avatar
XLXR XLXR is offline
XL FORUM LIFE MEMBER
 
Join Date: Aug 2006
Posts: 12,201
Sportster/Buell Model: XL1200 R
Sportster/Buell Year: 2006
Reputation: 711676
XLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond repute
Default

Reducing preload will have a greater lowering effect than reducing oil level. Generally, reducing preload to increase rider sag can be combined with increasing oil level to minimize bottoming out.
Reply With Quote
  #25  
Old 6th February 2009
familysporty familysporty is offline
Biker
 
Join Date: Nov 2008
Posts: 34
Sportster/Buell Model: Sportster 883C w 1200 kit
Sportster/Buell Year: 1999
Other Motorcycle Model: FXR BLACK & Cam'd Out!!
Other Motorcycle Year: 1987
Reputation: 12
familysporty is an unknown quantity at this point
Default

Quote:
Originally Posted by XLXR View Post
Reducing preload will have a greater lowering effect than reducing oil level. Generally, reducing preload to increase rider sag can be combined with increasing oil level to minimize bottoming out.
Huh?
Reply With Quote
  #26  
Old 6th February 2009
XLXR's Avatar
XLXR XLXR is offline
XL FORUM LIFE MEMBER
 
Join Date: Aug 2006
Posts: 12,201
Sportster/Buell Model: XL1200 R
Sportster/Buell Year: 2006
Reputation: 711676
XLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond reputeXLXR has a reputation beyond repute
Default

It's basic suspension set up techniques. Read the links in my signature for details.

The spring supports the weight of bike and rider. Decreasing the length of the preload spacer basically softens the spring rate, which means the spring will compress more under the weight of bike and rider. The distance the forks compress when the rider sits on the bike is called rider sag. Too much preload makes the spring stiffer, so the bike rides higher and feels stiffer over small bumps in the road. The minimum preload spacer length is where the top of the spacer just touches the bottom of the fork cap when it is screwed all the way down because you don't want the spring bouncing around loose when the forks are fully extended.

The oil dampens the movement of the forks/tire, it does not support the weight of the bike, but read on. On top of the oil is a small air chamber. As the forks compress, that air chamber gets smaller. If you add oil, that air chamber gets smaller, and it gets smaller quicker as the forks compress which resists bottoming. Adding oil tends to have the greatist effect at the end of the stroke by resisting bottoming of the forks. Too much oil will cause the fork to lock up. You should use a plastic tie on the forks to make sure you are using all the fork travel over big bumps or hard braking without bottoming the forks too hard. Short forks of Nightsters and Lows need about 1 oz, long forks on Roadsters need about 2 oz's extra, or even a little less.

Preload and oil height are related. Generally set the preload first to get the rider sag and ride quality you want. Then if the forks are bottoming out, add just enough oil to stop the bottoming.
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 18:09.


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