Honda305.com Forum

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.

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.

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.

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

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

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

Waveblaster wrote: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

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