Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

#%%##&$ sun tour barcon recessed hex bolts-5mm??

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

#%%##&$ sun tour barcon recessed hex bolts-5mm??

Old 08-16-13, 06:57 PM
  #1  
Hook 'Em Horns
Thread Starter
 
Join Date: Jul 2005
Location: Austin, Texas
Posts: 284

Bikes: Mine: Paul Taylor Custom 66cm, Rivendell custom 68cm, '75 Eisentraut Touring 69cm, 68cm track frame of indeterminate origin, '92 Cannondale M500. Ours: '93 Burley Duet tandem XL. Hers: L Mercier Sora thingy

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
#%%##&$ sun tour barcon recessed hex bolts-5mm??

I just recently acquired a '93 burley tandem and wanted to switch handlebars but I cannot get the recessed nuts off. help!!
brons2 is offline  
Old 08-16-13, 07:20 PM
  #2  
Senior Member
 
IthaDan's Avatar
 
Join Date: Jan 2012
Location: Ithaca, NY
Posts: 4,915

Bikes: Click on the #YOLO

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 12 Times in 12 Posts
They loosen the opposite way.
__________________

Shimano : Click :: Campy : Snap :: SRAM : Bang
IthaDan is offline  
Old 08-16-13, 08:12 PM
  #3  
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,598

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,354 Times in 861 Posts
to remove them the hollow bolt faces inward , so yes to loosen it you turn the 6mm allen CW.

the bolt through the lever itself is yes a 5mm one, the Nut is custom made by sun tour for themselves

thinner thickness , bigger hex , then there is a screw slot locknut on the outside you tighten against the nut, beneath it.

the 2 of them work together to set and maintain the retro friction.

I have a screwdriver with a notch in the center to get the domed nut tight.


someone posted a exploded diagram of them earlier this Year..
fietsbob is offline  
Old 08-16-13, 08:43 PM
  #4  
Senior Member
 
TiBikeGuy's Avatar
 
Join Date: Jul 2009
Location: Singapore
Posts: 348

Bikes: Litespeed Ti Mtb, BikeE Recumbent, Cannondale H600 Hybrid,

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 1 Time in 1 Post
The Suntour bar end shifters is made up of 2 parts. There is the shifter unit and there is the mounting unit that secures to the internal diameter of the handlebar.

1. Remove the cables from the derailleurs. Next remove the shifter unit from the mounting unit, this is done by using a flat head screwdriver. Put down any washers that you remove in the sequence so that you do not mess up the installation.

2. Once the shifter unit is removed, you should be able to access the allen key bolt that secures it to the handlebars. Loosen but do not remove it completely. There is an expander wedge that grips the internal surface of the handlebars. Once it is loosen use a small hammer to tap the allen bolt to loosen its grip. You should be able to remove it once the wedge is not expanded.

3. To install it back on the bike do the opposite steps that you removed it.
TiBikeGuy is offline  
Old 08-16-13, 08:58 PM
  #5  
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,544

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 139 Post(s)
Tagged: 1 Thread(s)
Quoted: 5703 Post(s)
Liked 2,432 Times in 1,345 Posts
In case you didn't grasp this from the prior posts. The 6mm bolt that holds them in is basically a countersink screw, which expands the collets as it's tightened. However you're working it from the opposite end from normal, so to push the head deeper into the bar and loosen the collet, you turn the screw to the right.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

Just because I'm tired of arguing, doesn't mean you're right.

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is online now  
Old 08-16-13, 09:01 PM
  #6  
Hook 'Em Horns
Thread Starter
 
Join Date: Jul 2005
Location: Austin, Texas
Posts: 284

Bikes: Mine: Paul Taylor Custom 66cm, Rivendell custom 68cm, '75 Eisentraut Touring 69cm, 68cm track frame of indeterminate origin, '92 Cannondale M500. Ours: '93 Burley Duet tandem XL. Hers: L Mercier Sora thingy

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I got frustrated and went to dinner. The shifter part is off. It's the mounting part that I can't get off. The first response indicated that it's reverse threaded. Is that true? I don't want to torque on it the wrong way.
brons2 is offline  
Old 08-16-13, 09:04 PM
  #7  
Hook 'Em Horns
Thread Starter
 
Join Date: Jul 2005
Location: Austin, Texas
Posts: 284

Bikes: Mine: Paul Taylor Custom 66cm, Rivendell custom 68cm, '75 Eisentraut Touring 69cm, 68cm track frame of indeterminate origin, '92 Cannondale M500. Ours: '93 Burley Duet tandem XL. Hers: L Mercier Sora thingy

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by FBinNY
In case you didn't grasp this from the prior posts. The 6mm bolt that holds them in is basically a countersink screw, which expands the collets as it's tightened. However you're working it from the opposite end from normal, so to push the head deeper into the bar and loosen the collet, you turn the screw to the right.
ok. I will try that. Thanks!
brons2 is offline  
Old 08-16-13, 09:05 PM
  #8  
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,544

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 139 Post(s)
Tagged: 1 Thread(s)
Quoted: 5703 Post(s)
Liked 2,432 Times in 1,345 Posts
Originally Posted by brons2
I got frustrated and went to dinner. The shifter part is off. It's the mounting part that I can't get off. The first response indicated that it's reverse threaded. Is that true? I don't want to torque on it the wrong way.
No. it's a RH thread, but look at the picture in my prior post. You turn it to the right so it goes deeper into the bar, which means the taper is moving away from the expanding segments.

BTW- both units have the same RH thread and work the same way.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

Just because I'm tired of arguing, doesn't mean you're right.

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is online now  
Old 08-16-13, 10:35 PM
  #9  
Hook 'Em Horns
Thread Starter
 
Join Date: Jul 2005
Location: Austin, Texas
Posts: 284

Bikes: Mine: Paul Taylor Custom 66cm, Rivendell custom 68cm, '75 Eisentraut Touring 69cm, 68cm track frame of indeterminate origin, '92 Cannondale M500. Ours: '93 Burley Duet tandem XL. Hers: L Mercier Sora thingy

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I got the bolts off, thanks!!

However, my elation was short lived. I didn't realize that the Nitto Technomic that I bought was 7/8ths and the tandem uses a 1" threaded stem. D'oh!!

Surely someone makes a spacer for these situations...I hope.
Attached Images
File Type: jpg
image.jpg (98.0 KB, 26 views)
brons2 is offline  
Old 08-16-13, 11:45 PM
  #10  
Senior Member
 
zukahn1's Avatar
 
Join Date: Oct 2011
Location: Fairplay Co
Posts: 9,582

Bikes: Current 79 Nishiki Custum Sport, Jeunet 620, notable previous bikes P.K. Ripper loop tail, Kawahara Laser Lite, Paramount Track full chrome, Raliegh Internatioanl, Motobecan Super Mirage. 59 Crown royak 3 speed

Mentioned: 26 Post(s)
Tagged: 1 Thread(s)
Quoted: 786 Post(s)
Liked 1,706 Times in 620 Posts
Well there are a lot of stems too fit your purpose as well as threaded 1inch too threadless type stem adapters that will allow you to run a tone off bars stems properly matched.
zukahn1 is offline  
Old 08-17-13, 06:29 AM
  #11  
Senior Member
 
IthaDan's Avatar
 
Join Date: Jan 2012
Location: Ithaca, NY
Posts: 4,915

Bikes: Click on the #YOLO

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 12 Times in 12 Posts
Originally Posted by brons2
I got the bolts off, thanks!!

However, my elation was short lived. I didn't realize that the Nitto Technomic that I bought was 7/8ths and the tandem uses a 1" threaded stem. D'oh!!

Surely someone makes a spacer for these situations...I hope.
Don't confuse yourself here- it sounds like the stem on the tandem is for a 1 1/8" threaded headset, while the Nitto stem you bought is for a 1" threaded headset.
__________________

Shimano : Click :: Campy : Snap :: SRAM : Bang
IthaDan is offline  
Old 08-17-13, 08:38 AM
  #12  
Hook 'Em Horns
Thread Starter
 
Join Date: Jul 2005
Location: Austin, Texas
Posts: 284

Bikes: Mine: Paul Taylor Custom 66cm, Rivendell custom 68cm, '75 Eisentraut Touring 69cm, 68cm track frame of indeterminate origin, '92 Cannondale M500. Ours: '93 Burley Duet tandem XL. Hers: L Mercier Sora thingy

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by IthaDan
Don't confuse yourself here- it sounds like the stem on the tandem is for a 1 1/8" threaded headset, while the Nitto stem you bought is for a 1" threaded headset.
I measured the original stem with my caliper measuring thingy and it's exactly 1" whereas the Nitto is exactly 7/8ths.
brons2 is offline  
Old 08-17-13, 08:51 AM
  #13  
Senior Member
 
IthaDan's Avatar
 
Join Date: Jan 2012
Location: Ithaca, NY
Posts: 4,915

Bikes: Click on the #YOLO

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 12 Times in 12 Posts
Originally Posted by brons2
I measured the original stem with my caliper measuring thingy and it's exactly 1" whereas the Nitto is exactly 7/8ths.
Try shopping for a 7/8" headset and report back to me.

The Nitto is for a 1" steerer and the stock stem is for a 1 1/8", no matter what the calipers say. It's critical to know the proper terminology if you're going to shop online for bike parts.
__________________

Shimano : Click :: Campy : Snap :: SRAM : Bang
IthaDan is offline  
Old 08-17-13, 09:22 AM
  #14  
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,544

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 139 Post(s)
Tagged: 1 Thread(s)
Quoted: 5703 Post(s)
Liked 2,432 Times in 1,345 Posts
It's a question of semantics. The OP is measuring the stem diameters, which equal the steerer IDs, while IthaDan is trying to explain the standard nomenclature for quill stems is by the OD of the steerer they fit. ia, a stem which measures 7/8" is called a 1" stem because it's for a 1" threaded fork. The OP needs a 1-1/8" stem (measures 1") for his tandem fork.

I don't know that anybody sells the adapter the OP needs, but it would have to be a 1" OD x 7/8" ID tube long enough to reach from the top of the headset to the bottom of the stem where the expansion happens. It would have to be split at the bottom so it could expand as the stem bolt is tightened.

The OP can go to the hardware store and see if he can find something with the right ID & OD, then fabricate the shim with a hacksaw. Otherwise hus best bet would be to return this stem and shop for a 1-1/8" stem.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

Just because I'm tired of arguing, doesn't mean you're right.

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is online now  
Old 08-17-13, 01:05 PM
  #15  
Hook 'Em Horns
Thread Starter
 
Join Date: Jul 2005
Location: Austin, Texas
Posts: 284

Bikes: Mine: Paul Taylor Custom 66cm, Rivendell custom 68cm, '75 Eisentraut Touring 69cm, 68cm track frame of indeterminate origin, '92 Cannondale M500. Ours: '93 Burley Duet tandem XL. Hers: L Mercier Sora thingy

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Yes, I agree that it would be better to return the Nitto and get something else.

I disagree that using the headset size to define the stem size is universally used. Perhaps in bike industry internal terminology. However, I can post a dozen links if so desired that state the outside diameter for the actual stem itself.

FWIW, the headset top nut is exactly 1 1/8ths, I went back and measured that too just for kicks. In the future, I will seek exact clarification on whether sellers are referring to the headset size or the stem diameter.

I have quite a few Nitto stems kicking around. I guess I just got lucky up until now and I never had to actually think about fitment sizes. So I learned something in that regard.
brons2 is offline  
Old 08-17-13, 03:37 PM
  #16  
Senior Member
 
IthaDan's Avatar
 
Join Date: Jan 2012
Location: Ithaca, NY
Posts: 4,915

Bikes: Click on the #YOLO

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Likes: 0
Liked 12 Times in 12 Posts
Originally Posted by brons2
I disagree that using the headset size to define the stem size is universally used. Perhaps in bike industry internal terminology. However, I can post a dozen links if so desired that state the outside diameter for the actual stem itself.
While I agree that quill diameter is prevalent to clarify 22.2 vs 22.0 quill sizes, I'd be willing to wager a non trivial amount of money that were you to Google "1" quill stem" that 99 out of 100 results would be a stem with either a 22.0 or a 22.2 quill diameter.

At the end of the day I was just trying to help the OP clarify his search keywords so he doesn't male the same mistake twice.

Edit: oh, you ARE the OP. whatever, good luck.
__________________

Shimano : Click :: Campy : Snap :: SRAM : Bang
IthaDan is offline  
Old 08-17-13, 03:50 PM
  #17  
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,544

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 139 Post(s)
Tagged: 1 Thread(s)
Quoted: 5703 Post(s)
Liked 2,432 Times in 1,345 Posts
Originally Posted by IthaDan

At the end of the day I was just trying to help the OP clarify his search keywords so he doesn't male the same mistake twice.

Edit: oh, you ARE the OP. whatever, good luck.
Don't you love it when folks come for help, then decide they know more than the folks trying to help them?

As the OP said, it might be industry nomenclature that refers to stems by what they fit, but in the end isn't that what counts?
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

Just because I'm tired of arguing, doesn't mean you're right.

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is online now  
Old 08-17-13, 05:49 PM
  #18  
Senior Member
 
miamijim's Avatar
 
Join Date: Aug 2003
Location: Tampa, Florida
Posts: 14,110
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 413 Post(s)
Likes: 0
Liked 109 Times in 78 Posts
Originally Posted by FBinNY
Don't you love it when folks come for help, then decide they know more than the folks trying to help them?
Sometimes they do...it depends who's answering the question.
miamijim is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
cyclingnewbie20
Road Cycling
3
06-13-14 08:57 AM
kingkenobi
Bicycle Mechanics
20
08-18-13 11:21 PM
JeffOYB
Bicycle Mechanics
18
11-28-12 03:55 PM
mosquito
Bicycle Mechanics
7
08-25-11 07:09 PM
wheelspeed
Tandem Cycling
5
08-09-11 10:38 AM

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.