gfxgfx
 
logo
 
gfx gfx
gfx
975807 Posts in 138943 Topics by 6363 Members - Latest Member: V6 DOW November 25, 2024, 03:53 PM
*
gfx* Home | Portal | Forum | Merchandise | Help | Login | Register | gfx
gfx
RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  New school Kuwahara Laserlite Bottom bracket problem.
gfx
gfxgfx
 

Author Topic: New school Kuwahara Laserlite Bottom bracket problem.  (Read 692 times)

0 Members and 1 Guest are viewing this topic.

Offline southern andy

  • Site Supporter
  • Tail Whip
  • *
  • Posts: 5896
  • Rated:
New school Kuwahara Laserlite Bottom bracket problem.
« on: November 28, 2013, 07:07 PM »
Ok, major help needed.......

I'm an Old school guy so this is confusing me big style.

My sons Kuwahara started grinding in the bottom bracket so we removed the crank arms to have a look. The drive side threaded bearing was at an odd angle in the frame so i removed it, whilst turning and pulling it came straight off the frame. The Non drive side is perfect, it threads in and out no problem.

So, either the thread on the drive side bearing has gone or maybe the thread inside the frame is knackered. Basically the threaded bearing just pushes straight in to the frame rather than screws in like the other side.







The threaded bottom bracket in the frame drive side.










The non drive side which is good.






Now worse case scenario is if the thread inside the bb is knackered then i'll suppose the frame itself is knackered ????

This bike is his pride and joy.  :( :(

Also what BB is it ???? I assume it's a Euro rather than a mid or spanish.

Help please  :'(
One build a year, the only way to get it right. No rushing involved.

Offline sawzall

  • 540 Air
  • *******
  • Posts: 2793
  • Rated:
Re: New school Kuwahara Laserlite Bottom bracket problem.
« Reply #1 on: November 28, 2013, 07:11 PM »
pop it in to pijin pat they should be able to advise :daumenhoch:
British race frames and race clothing wanted

Offline southern andy

  • Site Supporter
  • Tail Whip
  • *
  • Posts: 5896
  • Rated:
Re: New school Kuwahara Laserlite Bottom bracket problem.
« Reply #2 on: November 28, 2013, 07:22 PM »
Yeah i've thought of that Phil, wondered if anyone on here had ever stripped the threads inside of the frame and if so what did they do to fix it ????
One build a year, the only way to get it right. No rushing involved.

Offline kuwahero

  • Look Back
  • *****
  • Posts: 1257
    • Western Titans
  • Rated:
Re: New school Kuwahara Laserlite Bottom bracket problem.
« Reply #3 on: November 28, 2013, 07:39 PM »
andy

take it to a good quality bike shop and they should be able to re-thread the bb. I had to get it done once on a redline frame for a kid at our track.

I would recommend getting a new bb aswell.

 :daumenhoch:

Offline southern andy

  • Site Supporter
  • Tail Whip
  • *
  • Posts: 5896
  • Rated:
Re: New school Kuwahara Laserlite Bottom bracket problem.
« Reply #4 on: November 28, 2013, 08:08 PM »
Cheers Marc,

yeah i've just phone my mate Steve Geall  and am taking it to him on Saturday, i used to race against him back in the 80's and he said to pop it over. For the time being i've just basically rebuilt it and done it tight, with the arms pushing up against the bearings i physically cant see how the threads can undo as the arms are keeping them in.
One build a year, the only way to get it right. No rushing involved.

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  New school Kuwahara Laserlite Bottom bracket problem.
 

gfxgfx
gfx gfx
Powered by MySQL Powered by PHP Valid XHTML 1.0! Valid CSS!
SimplePortal 2.3.5 © 2008-2012, SimplePortal