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CB350 1971 Restoration Project

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AshimotoK0:
Ben took it to Trigger and he has  re-bored it and supplied oversize piston kits  :)

BenPowell:
Hi everyone,

Not given much of an update for a while, in all honesty I haven’t been doing as much as I would have liked, generally life getting in the way.

Although I have finished building my shed, meaning I have some space to work on the bike through winter and I’ve started going through all the parts which have been boxed up for some time. Found some tools I forgot I even had as well  ;D

Think the next step is removing the forks and wheels and start prepping the frame for paint, still not sure which route to go down with the paint, fortunately the frame looks to be generally rust free apart from the light surface rust in a few places.

I recently treated my car with Dinitrol and have some left over, don’t know if it would be worth doing the insides of the frame tubes with it to protect/seal it.

Hopefully will follow with more progress soon  :D

Thanks again

BenPowell:

--- Quote from: AshimotoK0 on June 30, 2021, 08:57:16 PM ---
--- Quote from: Menno on June 11, 2021, 09:32:22 PM ---If you would paint a candy red over white you would have to add so many layers to cover the white that the colour would become very dark.
But even still.... it is called light ruby red. Not light candy ruby red.

--- End quote ---

Last week we stripped a nasty rust patch off Ben's tank. Definitely original paint  but multi layers from the factory just like  AndrewS's 750K1 tank. If it was a solid colour why wold Honda bother doing that? As per the Honda Bulletin, I am sill convinced it's Candy coat over white base coat. We are going to try a patch, as I have some Candy Ruby Red paint left over.


(Attachment Link)

--- End quote ---

Bringing up the paint colour topic again with an update, myself and Ash finally got round to trying out the candy red on the white base on a small section of the tank.
We sanded back the red top coat to reveal the white base below, we then applied the candy red over the white.
The image shows the colour achieved by just having a quick go with the paint, it seems to match the original paint very well. The front lower portion of the tank is the original untouched paint, the stripe of red running over the top is the sample. What’s interesting is to look at the bike originally I wouldn’t have thought about it being a candy red over a white base. Based on the sample today, the multiple layers of red/white paint and the Honda bulletin, I’d be confident in saying that it is the correct way to produce the light ruby red colour.
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AshimotoK0:
Bit difficult from that image to see what is going on Ben.. I took this sample from your image though.

Interestingly my mate in Beverley had his 400/4 tank painted in 'Light Ruby Red' .. a solid colour supplied by RS Bikepaints. That red finish is typical of a 'solid colour' and nothing like your tanks original paint finish appearance.

Your tank's original factory paint finish is a bit like trying to describe/photo  the  CB750K0 Blue/green metallic .. you only see it's beauty 'in the flesh' and  photographs never do it justice.

I reckon if you use the candy ruby red, over the CB350 white as base-coat., as described in the Honda bulletin ... then  your bike is going to look absolutely stunning.  Given that your tank is original you can see that Honda (or their sub-contractor) had difficulty applying that paint combination as there are several failed attempts carried out on it prior to the final finish coats. Just like AndrewS's CB750K1 'Candy Ruby Red' tank.

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BenPowell:
Hi everyone,

Had a rare bit of free time today and got the rest of the components off the frame, so finally I have a bare frame and parts which I can start getting ready for painting. I have a question though, when I tipped the frame upside down to remove the footrest bracket I noticed a puddle of water which came out of the head tube/steering tube. Thought it was a bit odd I’ve had the bike about a year now and it has been stored indoors since I bought it. Condensation maybe?

Has anyone else had this and would it be worth adding some drain holes near the bottom of the frame? I don’t like the thought of water being able to get trapped in there.

I was thinking about using some dinitrol cavity wax/rust converter on the frame, and I think I definitely will now.

Cheers


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