SOHC.co.uk Forums > Project Board
CB750F2 .... silk purse from a sows ear.
Nurse Julie:
The frame looks standard to me, no extra bits and no bits missing either.
K2-K6:
The weld scar is just a weld through point to the underlying tube of main frame.
It's to raise the torsional rigidity of that top tube going into the headstock or else the pressing could to rotate around the tube. Also distributes the weld loading further along the tube from that seam weld to assist in avoiding a stress fracture at the seam point.
They'd have had two holes there in production so that they can build weld up on the base tube within the hole and then fix it to the perimeter of the outer pressing.
I think.
SumpMagnet:
Thanks ...you lot know EVERYTHING!
Nice to know this sort of thing, as I want to learn all I can about the beast as I go, good and bad, and ugly. I would be tempted to break out hte grinding pad and remove it...but now I won't. It's supposed to be there....so there it will stay :)
Bryanj:
Gearbox bearings rarely need replacing unless allowed to go rusty and several are Honda only (expensive) due to grooves on the outer, rest is just time, care and super cleanliness
petermigreen:
--- Quote from: SumpMagnet on July 31, 2018, 02:55:46 PM ---
I also need to work out how to strip and paint the frame without losing the rivetted on ID plate. Sure, there is a seperate stamped number, but I would really like to retain it.
--- End quote ---
There are two ways to retain the vin plate. You could mask it off or ask your powder coater/painter to mask it off but mine won't do it.
or you can carefully remove the rivets and replace the plate after painting. I used these
https://www.oneillvintageford.co.uk/cgi-bin/sh000001.cgi?REFPAGE=https%3a%2f%2fwww%2eoneillvintageford%2eco%2euk%2f&WD=rivet&PN=Ford_Model_A_Dash_Plates%2ehtml%23a_23100#a_23100
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Probably available elsewhere also but haven't been able to find them.
Select suitable size rivets from the pack and measure diameter then find a drill bit a shade smaller and they tap in quite easily.
BUT.
If you need to get registered in the UK make sure you take a photo of the vin plate BEFORE you remove it for evidence. I nearly came unstuck with my CB400F restoration because the dating officer said it showed evidence of tampering which technically it had as I'd removed it and replaced it but on the same bike so no shenanigans ;D
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