CB77 1964

[Waveblaster]

Hello I wanted to share a few pictures around my CB77 build in case anyone is interested.

After completing a rebuild restoration of a 1964 Dream I wanted to turn my attention to a Super Hawk. They are relatively rare in Australia and those who have are generally not willing to part. I managed to find one in rough condition at a dealer. I had to purchase a bunch of bikes in bits to obtain. A bit of a headache sorting out boxes of parts but swings and round abouts most of the parts are there. There was also a couple of dreams, cl72,cb77 1967. A pricey exercise...

As I am waiting for my next work contract I have found myself in the reverse position to normal. Relatively time rich and funding poor. The build was previously on a shoe string budget but currently more like dental floss!. I have tried to focus on spending money on the key areas. Superficial or cosmetic items I will address later as better funding presents itself.

[Waveblaster]

I spent a lot of time messing with the head. Fitted new cam bearings. Interestingly the exhaust lobes had approx 2mm extra lift so I wanted to reuse this cam for potentially a bit extra performance perhaps. I struggled getting the cam together as the splines are a larger diameter. After a few failed attempts at installing I returned to the assortment of cam components to find the matching cam sprocket assembly.

[Waveblaster]

A bit of a progress photo.

Sitting the freshly painted tank on My first foray into the use of 2 part paint having previously been happy with Acrylic. Definitely more challenging to use but the depth of gloss off the gun is great.

Waiting on fork seals to arrived so I can get the front end built. Have fitted the chrome rear shock that were sitting in a box. I have the original back shroud units which I can fit once cleaned.

New bars and polished controls.

The motor was pretty tired. The barrels were very worn and the top ring almost non existent with the large lip o the barrel. 4th over pistons are now with the machine shop for boring.

[G-Man]

Greg

Looks like you're having fun! A few years ago I took 'early retirement' and collected quite a pile of old 60s Hondas to play with. Unfortunately my retirement only lasted a week and I ended up back at work. Work is slow but always fun.

Bikes are great therapy and time just flies when you are in the workshop.

I don't recognise the splined washer in your picture but there are only a couple of places where it might fit. Maybe someone tried to take up end float in the gearbox?


G

[Waveblaster]

Cheers Graham

Good to hear your work gets you going.

Yes bikes seem to be quite cathartic. Or a mid life crisis according to my wife :). For me it is nice to rekindle my mechanical aptitude to balance the work I do normally.

Need to keep busy. Hence perhaps my numerous posts and questions of late.

re the spacer. I have found several amongst the nuts and bolts of a few bikes , one I found appears to be bronze. I dont believe they are an internal shim on the primary transmission shaft due to a thickness of 3mm. The end float measures 0.8mm. I tried to be clever and had my father who has a decent lathe machine a few different thickness shims for the right hand side of the shaft behind the bearing with a view to reduce end float. Unfortunately while we were machining I realised that the clutch basket may pull up this slack and it did, pushing the looseness to the output side. As the shims were mild steel and not polished I chose not to butt up against the friction surface of the phos bronze of the 4th gear. Hopefully 0.8mm end float wont be too much of a concern.

The spacer could fit around the clutch shaft but there isn't enough play. My money is as a spacer between the oil slinger drive sprocket and the tang lock spacer on the crank end. perhaps the splined spacer adds additional friction to the sprocket?

Greg

[LOUD MOUSE]

HONDA didn't install that part in any of the C/CA/CB/CL72/77 engines. .......lm

Cheers Graham

Good to hear your work gets you going.

Yes bikes seem to be quite cathartic. Or a mid life crisis according to my wife :). For me it is nice to rekindle my mechanical aptitude to balance the work I do normally.

Need to keep busy. Hence perhaps my numerous posts and questions of late.

re the spacer. I have found several amongst the nuts and bolts of a few bikes , one I found appears to be bronze. I dont believe they are an internal shim on the primary transmission shaft due to a thickness of 3mm. The end float measures 0.8mm. I tried to be clever and had my father who has a decent lathe machine a few different thickness shims for the right hand side of the shaft behind the bearing with a view to reduce end float. Unfortunately while we were machining I realised that the clutch basket may pull up this slack and it did, pushing the looseness to the output side. As the shims were mild steel and not polished I chose not to butt up against the friction surface of the phos bronze of the 4th gear. Hopefully 0.8mm end float wont be too much of a concern.

The spacer could fit around the clutch shaft but there isn't enough play. My money is as a spacer between the oil slinger drive sprocket and the tang lock spacer on the crank end. perhaps the splined spacer adds additional friction to the sprocket?

Greg

[Waveblaster]

Cheers LM

Appreciate your informed response. It will remain a true mystery.... At least I can feel confident to continue with the assembly now.

Greg