SOHC.co.uk Forums > CB350/400

CB400 Bolt Pitch

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waffey:
Thanks for the reply's,

I am definitely planning to use the same engine bolts etc.

So lessons learnt are, use the originals, get them zinc plated, make sure I check the correct lengths for the correct item.

I see on the fiche for the frame there are some odd size's. Here is a list I compiled.

Hex - 5 x 20
Flanged - 6 x 25
Screw - 6 x 20
Flanged - 6 x 20
Hex - 6 x 20
Flanged - 5 x 20
Hex - 6 x 8
Hex - 6 x 12
Hex - 6 x 16
Hex - 8 x 16
Hex - 6 x 14
Hex - 6 x 15
Hex - 6 x 22
Hex - 6 x 25
Hex - 6 x 28
Hex - 6 x 36
Hex - 8 x 25
Hex - 8 x 28
Hex - 8 x 32
Hex - 8 x 45
Hex - 7 x 54
Hex - 8 x 80
Hex - 10 x 80
Hex - 10 x 32
Hex - 8 x 40
Hex - 8 x 50
Hex - 5 x 20
Screw - 6 x 20
Flanged - 6 x 25
Hex - 6 x 16

Trigger:
You should not go by the fiche. I was putting a front mudguard on a Honda yesterday and the fiche size was M6x 16mm and when i measured  the depth, it was only 12mm. If i tried to get the 16mm in i would of broke the lugs on the fork  :o

mickwinf:
Oddjob the 10mm bolts are 1.25 pitch on Hondas, the standard pitch on generic bolts is 1.5mm

TrickyMicky:
Hiya, with regard to 'which bolt in which hole', when I removed the cam-cover from my 400 many years ago, (1991!), not being an engineer I did not have the faintest idea how to identify bolt thread pitches etc.. (still haven't). So I obtained a nice piece of flat cardboard and used a marker pen to draw a full size outline of the cover, then as each bolt was removed, it was pushed through the cardboard in its respective location, then carefully stored. When the rebuild commenced 13 years later, (you can't rush these jobs), my simplistic brain was not overtaxed when it came to replacing the bolts into their correct locations. Maybe if you are deft of hand this system could be advanced to other fixings. Remember, K.I.S.S. Regards, Mick.

mattsz:

--- Quote from: TrickyMicky on March 14, 2019, 10:25:53 AM ---Hiya, with regard to 'which bolt in which hole', when I removed the cam-cover from my 400 many years ago, (1991!), not being an engineer I did not have the faintest idea how to identify bolt thread pitches etc.. (still haven't). So I obtained a nice piece of flat cardboard and used a marker pen to draw a full size outline of the cover, then as each bolt was removed, it was pushed through the cardboard in its respective location, then carefully stored.
--- End quote ---

I've done that with engine work on other bikes, works a treat!  Difficult to replate them stuck in the cardboard, though...  ;)

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