Topic: CB400/4

[allankelly1]

Evening all

New member here

Always has a soft spot for the CB400/4

And after a chat with the darling wife I am now a proud owner of a red 1977 bike.









The bike itself is reasonably tidy and is running ok and even came when I opened up the seat the original tool kit and a 43 year old owner’s manual



The bike could do wilt  a bit of work here and there and first thoughts were to restore it to an original bike, but to be honest I thought the same when I got a RD350LC “project bike” for the Yellow RD350LC project but to be honest like to have something that is in keeping with the period but also has a few personal unique touches / changes



Took it out for a quick ride today and the front brake is totally carp and is In dire need of either repair of replacement so first change will be to look at the possibility to replace the complete front disc brake with a more modern  single piston floating calliper twin disc set up off a bike from the mid 80s just to keep the period look

Once this is done and she has had a good check over (and a mot just to tick the box for insurance proposes as it’s not been for a mot since 2012) then I will use her for the summer in its current state while getting other goodies such as a Yoshi cyclone exhaust, ally rims and stainless spoke kit electronic ignition and a few other bits and bobs in preparation for the end of summer where it will be time for a complete strip and rebuild from the ground up just like the RD

In the meantime will keep you all up to date on how goes including the front disc upgrade

Best wishes Al


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[tool14]

welcome aboard.

[Can550]

Welcome from cold Canada
Great 400f


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[carnivorous chicken]

Clean 400!

[MD]

Welcome from Lake Superior,

Nice find,

-MD

[allankelly1]

Hi all

Thanks for the hellos

Well decided to take the plunge and convert the CB 400/4 to a twin disc front end

I know it’s not original but really like the symmetry of a twin disc front end and bike was alway going to be slightly different from original anyway





There’s a bit of way to go yet as to get the correct fork length the fork assemblies are 400/4 stanchions / damper assemblies with CB400N lower sliders that will need the lower section of the stanchions modifying to incorporate the later Honda design that has a spilt bush on the bottom of the stanchion that runs in the slider bore rather than the complete stanchion leg

Also hub and discs will need some changes as original disc is a four bolt mounting and the donor discs are five

(And the plain discs will be drilled at some point too)

Lastly due to the extra disc the speedo drive willl need a tweaking to get the drive past the extra disc,

But none of the above are impossible to solve and I have alway enjoyed the challenge of solving problems )Also having access to a full tool room helps ) Plus the bike it will stop much better than the original pivot design

Catch up with you all soon

Best wishes Al


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