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