Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: Dave487 on October 29, 2015, 09:28:49 PM

Title: Broken bits on frame
Post by: Dave487 on October 29, 2015, 09:28:49 PM: More info' required.
The stripping of my 400 4 is coming along but I have noticed what appears to be a couple of broken fitting points on the frame under the seat area. It looks like a some collars which were welded to the frame have broken or been removed as shown in pic'.
Anyone know what there as none my pictures of the frame show anything in that position.
Title: Re: Broken bits on frame
Post by: stevush on October 30, 2015, 08:38:03 AM: Just checked my frame and I don't have any holes there. Mine is a '77 F2

I have a pic if you'd like it

Cheers
Steve
Title: Re: Broken bits on frame
Post by: royhall on October 30, 2015, 09:02:29 AM: Not meant to have holes there. The PO probably drilled them for some reason. Just get them welded up as they are not required.

Sent from my GT-I9305 using Tapatalk
Title: Re: Broken bits on frame
Post by: Bryanj on October 30, 2015, 09:18:10 AM: Is there a peg sticks up there to act as a helmet holder?
Title: Re: Broken bits on frame
Post by: Chris400F on October 30, 2015, 01:29:45 PM: Quote from: Bryanj on October 30, 2015, 09:18:10 AM
Is there a peg sticks up there to act as a helmet holder?
Helmet holder peg is further back and fixed to the side of the frame tube.

No holes in mine either - this section of the frame is normally covered by the tool tray and lid.
I take it the holes are only in the top of the frame tubes and don't go right through.
Maybe locating or mounting holes for something like a café seat unit.
Title: Re: Broken bits on frame
Post by: Dave487 on October 30, 2015, 07:27:49 PM: Thanks again for the info' guys. Maybe someone bolted a tool tray or something in there, but it would seem that they're not important so I'll ignore them.
Title: Re: Broken bits on frame
Post by: Bodd on October 31, 2015, 10:18:01 AM: The holes look very similar to the ones I drilled for my cafe seat.

[attachimg=1]
Title: Re: Broken bits on frame
Post by: mike the bike on October 31, 2015, 10:30:27 AM: If my frame had holes like that I'd have them welded up. There may be stress points round by the holes which could lead to metal fatigue - as per de Havilland Comets
Title: Re: Broken bits on frame
Post by: Bodd on October 31, 2015, 11:45:26 AM: Quote from: mike the bike on October 31, 2015, 10:30:27 AM
If my frame had holes like that I'd have them welded up. There may be stress points round by the holes which could lead to metal fatigue - as per de Havilland Comets

Maybe if you weigh 30 stones and jump off ramps ;)
Title: Re: Broken bits on frame
Post by: royhall on October 31, 2015, 12:19:50 PM: Quote from: Bodd on October 31, 2015, 10:18:01 AM
The holes look very similar to the ones I drilled for my cafe seat.

(Attachment Link)
That's a top class looking bike Bodd. You got any more pictures?
Title: Re: Broken bits on frame
Post by: Bodd on October 31, 2015, 01:08:49 PM: Quote from: royhall on October 31, 2015, 12:19:50 PM
That's a top class looking bike Bodd. You got any more pictures?

Thanks Roy. Build thread link is in my forum signature, finished bike photos can be seen here (http://www.skylinesoftware.co.uk/400finished.html).