Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 02-11-10, 03:18 PM   #1
wallymann
Senior Member
Thread Starter
 
wallymann's Avatar
 
Join Date: Jan 2010
Bikes:
Posts: 126
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i *LOVE* Eye-Talian quality-control...

...NOT!!!

thankfully the front of the fork-crown isnt really under any stress when braking, so grinding to correct this shouldnt be a problem.



wallymann is offline   Reply With Quote
Old 02-11-10, 03:23 PM   #2
JunkYardBike
Since 1938...
 
JunkYardBike's Avatar
 
Join Date: Aug 2006
Location: Northwestern NJ
Bikes:
Posts: 6,212
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Wassa matter for you?
JunkYardBike is offline   Reply With Quote
Old 02-11-10, 03:34 PM   #3
cycleheimer
Senior Member
 
cycleheimer's Avatar
 
Join Date: Nov 2008
Location: New York Metro Area
Bikes: '14 Insight 2, '95 Trek 720 Multi-Track, '94 Cannondale M600; '92 Raleigh Dash Max; '86 Panasonic DX 5000, '81 Fuji S12S, '81 Fuji Royale; '79 Dawes (Reynolds 531); '78 Bridgestone Diamond Touring, '78 Motobecane Grand Touring
Posts: 3,753
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Quality control problem?
Attached Images
File Type: jpg 2395537243_cd495a2be8_t.jpg (5.3 KB, 298 views)
cycleheimer is offline   Reply With Quote
Old 02-11-10, 03:52 PM   #4
Amani576
Buh'wah?!
 
Amani576's Avatar
 
Join Date: Jul 2008
Location: Raleigh, NC
Bikes: 1972 Raleigh Twenty, mid-80's Trek
Posts: 2,131
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Seems like they drilled it downwards. I'd ask if there's anyways you can mount it backwards on the fork, but that doesn't work too well with sidepulls, nor does it look very nice.
-Gene-
Amani576 is offline   Reply With Quote
Old 02-11-10, 04:29 PM   #5
helicomatic
nice idea, poor execution
 
Join Date: Oct 2009
Location: West Newton, MA
Bikes:
Posts: 397
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Could be somewhat exacerbated by an overenthusiastic crown race seat milling, in addition to being drilled crooked.
helicomatic is offline   Reply With Quote
Old 02-11-10, 04:41 PM   #6
PDXaero
French threaded
 
PDXaero's Avatar
 
Join Date: Aug 2008
Location: Portland, OR.
Bikes: many
Posts: 1,223
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Rethinking my plans for a somec/gipiemme project.
Ill stick to french bikes.
PDXaero is offline   Reply With Quote
Old 02-11-10, 04:53 PM   #7
Mike Mills
Senior Member
 
Join Date: Oct 2008
Bikes:
Posts: 2,929
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Wassa madda you? The hole she's a straight. It's a da fork crown that was tilted.

Send it back to the maker for repair/replacement.

I would NOT grind the crown race to fix that.

If you are going to take off material anywhere, grind tops of the washers until they slip under the race.
Mike Mills is offline   Reply With Quote
Old 02-11-10, 04:59 PM   #8
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,725
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
My CLB-2 brakeset features a washer with a flatted section to clear such headsets. Avoidable, yes, but not unfixable.

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 02-11-10, 05:19 PM   #9
wallymann
Senior Member
Thread Starter
 
wallymann's Avatar
 
Join Date: Jan 2010
Bikes:
Posts: 126
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by cudak888 View Post
to clear such headsets. Avoidable, yes, but not unfixable.
it's not a biggie, i'll grind some star washers and stack 'em.

but the problem is not the headset. it's the drilling. look at the hole centerlines (the lower horizontal lines), they are not equidistant from the crown race!!!

wallymann is offline   Reply With Quote
Old 02-11-10, 05:25 PM   #10
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,725
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Quote:
Originally Posted by wallymann View Post
but the problem is not the headset. it's the drilling. look at the hole centerlines (the lower horizontal lines), they are not equidistant from the crown race!!!
Yes, yes, I see it. Still, it isn't absolutely terminal - it can be worked around.

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 02-11-10, 07:00 PM   #11
wallymann
Senior Member
Thread Starter
 
wallymann's Avatar
 
Join Date: Jan 2010
Bikes:
Posts: 126
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by cudak888 View Post
My CLB-2 brakeset features a washer with a flatted section to clear such headsets. Avoidable, yes, but not unfixable.

-Kurt
oh yeah, it's already bolted up. i split the difference, took ~1mm out of the south-end of the hole and ~1mm off the north end of the stacked star washers. i also knocked a little off the hex-bolt on the back of the caliper.

voila! just one of those funny "artisan" effects that makes each bike unique. :-)

here's a pic, post-fix...it's snug!


Last edited by wallymann; 02-11-10 at 08:55 PM.
wallymann is offline   Reply With Quote
Old 02-11-10, 07:16 PM   #12
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,725
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
More importantly, what the hell is that thing? I want to stay away from them.

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 02-11-10, 07:41 PM   #13
gomango 
Senior Member
 
Join Date: Jul 2006
Location: STP
Bikes:
Posts: 14,321
Mentioned: 28 Post(s)
Tagged: 0 Thread(s)
Quoted: 475 Post(s)
Quote:
Originally Posted by wallymann View Post
oh yeah, it's already bolted up. i split the difference, took ~1mm out of the south-end of the hole and ~1mm off the north end of the stacked star washers. voila!

just one of those funny "artisan" effects that makes each bike unique!
Problem solving 101. You haven't lived till you've worked on a Fiat! Can't wait to see her built up. I keep coming back and taking a look at your original thread, and I think I'd like to ride one of these for a summer or two. Have you found any other "little" quirks?
__________________


Bikes and stuff

https://www.flickr.com/photos/[email protected]/
gomango is offline   Reply With Quote
Old 02-11-10, 07:53 PM   #14
Chombi 
Senior Member
 
Chombi's Avatar
 
Join Date: Jul 2009
Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC
Posts: 11,141
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 134 Post(s)
Uhmmm....drop bolt time??!!

Chombi
Chombi is offline   Reply With Quote
Old 02-11-10, 09:02 PM   #15
wallymann
Senior Member
Thread Starter
 
wallymann's Avatar
 
Join Date: Jan 2010
Bikes:
Posts: 126
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Chombi View Post
Uhmmm....drop bolt time??!!
nah. drop-bolts are designed for BIG off-sets, not a few mm due to poor QC.

Quote:
Originally Posted by gomango View Post
Have you found any other "little" quirks?
the rear brake bridge is neat -- it's not a single cast piece, but hand-made from a cast center and cut/notched/bent arms and "lugs" on the chainstays all brazed in place.

nice touch, no expensive tooling necessary!


wallymann is offline   Reply With Quote
Old 02-11-10, 09:56 PM   #16
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,725
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
What is that thing?

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 02-11-10, 10:00 PM   #17
jan nikolajsen
Mostly Mischief
 
jan nikolajsen's Avatar
 
Join Date: Apr 2008
Location: Moab, Utah
Bikes: Cannondale SuperX, Santa Cruz Tallboy, Surly Krampus
Posts: 1,417
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Somec, right? It says on fork crown.
jan nikolajsen is offline   Reply With Quote
Old 02-11-10, 10:41 PM   #18
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,725
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Quote:
Originally Posted by jan nikolajsen View Post
Somec, right? It says on fork crown.
Whoops, missed that gold amongst all the chrome.

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 02-12-10, 01:52 AM   #19
Mike Mills
Senior Member
 
Join Date: Oct 2008
Bikes:
Posts: 2,929
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
I posted it first. :-)

You're welcome.

How about filling the misdrilled hole with heavily metal-filled epoxy and then redrilling it correctly? You could conceivably epoxy-bond a steel rod into that sad hole using epoxy to add some metal back into the affected area before redrilling.

You don't want to weld or silver solder as it will hurt the chrome and paint.
Mike Mills is offline   Reply With Quote
Old 02-12-10, 02:42 AM   #20
Torchy McFlux
Senior Member
 
Torchy McFlux's Avatar
 
Join Date: Sep 2007
Location: Vancouver
Bikes: NOYB
Posts: 1,438
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I wouldn't mess around with a defective fork crown too much.
Somec doesn't build that many bikes per year, do they? I'm surprised something like this got by them. Where did you get the fork from? Makes me wonder if someone's flogging factory seconds off on overseaers.
Torchy McFlux is offline   Reply With Quote
Old 02-12-10, 06:05 AM   #21
rumrunn6
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Bikes: Bottecchia Sprint
Posts: 18,196
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 1503 Post(s)
yep!
Attached Images
File Type: jpg monica_belluci.jpg (21.3 KB, 38 views)
rumrunn6 is offline   Reply With Quote
Old 02-12-10, 06:28 AM   #22
gomango 
Senior Member
 
Join Date: Jul 2006
Location: STP
Bikes:
Posts: 14,321
Mentioned: 28 Post(s)
Tagged: 0 Thread(s)
Quoted: 475 Post(s)
Quote:
Originally Posted by Mike Mills View Post
I posted it first. :-)

You're welcome.

How about filling the misdrilled hole with heavily metal-filled epoxy and then redrilling it correctly? You could conceivably epoxy-bond a steel rod into that sad hole using epoxy to add some metal back into the affected area before redrilling.

You don't want to weld or silver solder as it will hurt the chrome and paint.
Please don't consider doing this to the bike. It doesn't deserve it.

Again, your washer solution is fine. Go forth with vigor on your build.
__________________


Bikes and stuff

https://www.flickr.com/photos/[email protected]/
gomango is offline   Reply With Quote
Old 02-12-10, 06:31 AM   #23
gomango 
Senior Member
 
Join Date: Jul 2006
Location: STP
Bikes:
Posts: 14,321
Mentioned: 28 Post(s)
Tagged: 0 Thread(s)
Quoted: 475 Post(s)
Quote:
Originally Posted by rumrunn6 View Post
yep!
Very nice addition to the thread. Clearly, this will give Wallymann any energy he may need to keep building. Or it will be a huge distraction.
__________________


Bikes and stuff

https://www.flickr.com/photos/[email protected]/
gomango is offline   Reply With Quote
Old 02-12-10, 07:00 AM   #24
wallymann
Senior Member
Thread Starter
 
wallymann's Avatar
 
Join Date: Jan 2010
Bikes:
Posts: 126
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
this issue is done, i filed ~1mm from the bottom of the mis-aligned hole then ~1mm from the tops of the star-washers...that gave me enough room for stuff to fit snugly

the front of the fork crown doesnt see much stress, as the brake caliper tends to be pulled *away* from the fork when applying brakes. no need for filler or welding or anything.

Quote:
Originally Posted by Torchy McFlux View Post
I wouldn't mess around with a defective fork crown too much.
Somec doesn't build that many bikes per year, do they? I'm surprised something like this got by them. Where did you get the fork from? Makes me wonder if someone's flogging factory seconds off on overseaers.
this bike is from 1984 and i bought it from the 1st private owner after spending most of it's life in a shop window or store-room. back then, customers werent so discerning.

Last edited by wallymann; 02-12-10 at 07:10 AM.
wallymann is offline   Reply With Quote
Old 02-12-10, 12:28 PM   #25
jan nikolajsen
Mostly Mischief
 
jan nikolajsen's Avatar
 
Join Date: Apr 2008
Location: Moab, Utah
Bikes: Cannondale SuperX, Santa Cruz Tallboy, Surly Krampus
Posts: 1,417
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Lots of advice here, some good, some questionable.. but clearly wallyman knows what he's doing, despite having only 48 posts. Sometimes in our close knit community we forget that newcomers can have as much or more experience than the resident experts.

BTW nice photo presentation of the now solved issue.
jan nikolajsen is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 12:47 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    get answers from real people!
Click to start entering your question.
I HAVE A QUESTION