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Vintage Honda Owners,
Restorers, Riders and
Admirers

1963 CYP77

Want to keep a Restoration Log? Post it here! You can include photos. Suggested format: One Restoration per Thread; then keep adding your updates to the same thread...

Moderator: prima5star

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G-Man
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Re: 1963 CYP77

Post by G-Man » Sun Dec 08, 2019 2:01 pm

Michael

Great story! Thanks for sharing that.

Not a Honda but this might remnd you!

https://www.youtube.com/watch?v=xpHQMvB ... RfGrKNieZQ

We spent a week in Norway in June but we didn't hear any Police Sirens!

G
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

GregMcN
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Location: Richmond, North Yorkshire, UK

Re: 1963 CYP77

Post by GregMcN » Thu Jan 02, 2020 4:54 pm

Love the CYP77 Graham and the quality of the restoration.

Greg

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G-Man
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Joined: Wed Mar 25, 2009 5:17 pm
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Re: 1963 CYP77

Post by G-Man » Thu Jan 02, 2020 5:24 pm

Greg

Thanks - It's been really interesting. It has prompted me to build a white CB77. I have the frame and a close matching engine top case. Now I have to locate the other bits!

G
GregMcN wrote:
Thu Jan 02, 2020 4:54 pm
Love the CYP77 Graham and the quality of the restoration.

Greg
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

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G-Man
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Re: 1963 CYP77

Post by G-Man » Mon Jan 13, 2020 4:03 am

My great friend, Les, who has studiously learned the art of metal polishing, has a tame chrome plater in the City of Birmingham, UK.

He gets a one-day turnaround. If he takes items in for stripping at 9am, they are ready for collection at 4pm the same day.

The parts get taken home and polished in his workshop using a setup he designed and built himself using several grades of polishing wheels. The parts go back to the platers and get plated with copper, nickel and chrome in the space of one day.

Here is the most recent set of parts.

Image

It's always exciting to unwrap all of the shiny parts but, yesterday, the most exciting parts were these super-rare cable adjusters for the CYP77.

Image


G
Last edited by G-Man on Mon Jan 13, 2020 4:08 pm, edited 1 time in total.
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

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Muddy
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Location: Sunshine Coast, QLD, Australia

Re: 1963 CYP77

Post by Muddy » Mon Jan 13, 2020 3:43 pm

Wow, that is awesome in finish and turnaround time. Wish we had someone like that close to me.
Thanks.

Regards

Muddy

'64 C72

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G-Man
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Re: 1963 CYP77

Post by G-Man » Sun Feb 02, 2020 2:41 am

We have two sirens for the CYP77 but neither of them are correct. Because this bike has the siren drive on the left side of the rear wheel the sirens are much harder to find than all of th elater bikes which drive on the right.

Image

I worked out that it would be possible to drive a CB450 siren which appears to work the same whether driven in the forward or reverse direction. The problem is that the CB450 has an M10 left hand thread on the drive spindle while the CYP77 cable has a right-hand thread. By using a pair of adapters (inside and out) I think it will be possible to attach the mis-matched cable and drive.

I was looking for some tough steel for the drive shaft adapter and noticed that I had just done one of my kickstart gear mods. After a quick check it appeared that it would be just the right length.

Image

When I came to machine it, the spline end was still very hard so it had to be annealed to soften it.

Image

With that done I was able to start machining.

Image

The adapter has an M10 right hand thread for the CYP77 cable and an M10 left-hand thread to attach to teh CB450 siren.

Image

With that done it was on to the outer adapter which had M38 internal and external threads, both thankfully right hand threads.

Image

Using the inner adapter to gauge the dimensions. The outer part was set to length and bored to clear the cable, and the diameter for the internal thread.

Image

My Myford lathe is an imperial one so I have to put on the metric conversion kit which I have had for sme time but never used.

G
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

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G-Man
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Joined: Wed Mar 25, 2009 5:17 pm
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Re: 1963 CYP77

Post by G-Man » Tue Feb 04, 2020 2:07 pm

I got the lathe converted to metric using a special kit of gearwheels which, quite cleverly, allow me to cut metric threads using my existing gearbox.

Image

I was able to cut the M38 x 1.5 internal and external threads on the outer adapter sleeve....

Image

It all went together nicely.

Image

Next I had to add a couple of details to the drive adapter so that it would a) stay in place on the siren shaft and b) provide a means of tightening with a spanner.

Image

I've still got to put a 'diamond knurl on the outer part to match the original but I've had to order a new tool to do that.

G
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

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