1972 Honda CB175 Super Sport restoration

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jehintheuk
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Re: 1972 Honda CB175 Super Sport restoration

Post by jehintheuk »

911hillclimber wrote:Re:
Hillclimbs/Sprints

Get yourself to a proper Drivers' School at a good hillclimb venue or a Sprint one. Good way to spend the day to see if you like it and what is involved.
It is not simple but easy to get the basics right.

400-4, what a dream bike!
Good advice.

Loved both the 400-4 and the 175 - your carb pics really took me back. :-)
911hillclimber
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Re: 1972 Honda CB175 Super Sport restoration

Post by 911hillclimber »

Progress has all but stopped on the bike.

Motorsport and 911 drives and a big tour coming up plus the chrome man is giving me the cold-shoulder, typical of one-man-bands at times.
Still getting parts in preparation of chrome arriving and I have the paint so I can do the 'bodywork'.

Found a tired but restorable side panel emblem in the USA which I plane to restore and take a resin copy cast of for the other side.
The emblems are VERY rare and very complicated to get right, should keep me busy...
Once I have the chrome the front forks can go together as well as the whole rear end.

I'll do the lighting and loom after and it will be time for fuel!
And a battery, and a prod on the starter button.

I had some trouble getting the previous Honda to run on both carbs last time, tricky to balance but when done what a gem of a little engine these are.

Plan to be done by end of November, certainly well before Xmas. :drunken:
73T 911 Coupe, road/hillclimber 3.2L
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911hillclimber
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Re: 1972 Honda CB175 Super Sport restoration

Post by 911hillclimber »

Chrome man has not started the chrome. Typical of that industry, so...should be done by the 18th Sept. We shall see.

From that telephone call, decided to be positive and Do the Paint.

The right colour had arrived in rattle cans expensively from a specialist, so because of the cost (£86) decided to read the instructions!

Never painted metallic before or water based paint, so with some care dusted the parts in colour (I has etched and primed a few weeks ago).
Decided 4 coats should do it so between doing the smaller parts fixed the scares on the tank, the tank being the last part to be coloured.

Spray cans are great, 400ml and a good colour density and quite immune to runs! Just as well with me holding the can.

Just finished all the colour in a day, 4 coats which will dry overnight in the warm garage. If this weather holds, I hope to have the parts less tank with 3 coats of clear and then leave them to harden for a week or so.
The tanks needs some details adding before clear and the clear really needs to be fuel proof, the clear I have is not proof.

With a bit of luck the chrome will be here and the paint buffed up. That's the plan...

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73T 911 Coupe, road/hillclimber 3.2L
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911hillclimber
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Re: 1972 Honda CB175 Super Sport restoration

Post by 911hillclimber »

At last the painting is all done.
Decided to stick with my interpretation of the Honda original design and also to clear coat the tank and side panels with fuel resistant clear which gave an amazing gloss finish.
This DIY/rattle-can approach has saved about £500, cost has been just over £100, plus the challenge of doing metallic for the first time every is all done. :)

Life will delay any further progress for a while so I hope my chrome man will deliver the goods and progress will move into overdrive.
Chrome will allow all the front suspension to be installed and lots of other details, assemble the cables and then to all the lighting.

Time then to get it going and balanced, nearly done then! (as if....)

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AndrewSlater
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Re: 1972 Honda CB175 Super Sport restoration

Post by AndrewSlater »

That finish looks really excellent in the photos - any reason to think it won't be as durable as a paintshop job?
1966 Porsche 912 Slate Grey, red interior - first owner owned for 41 years
1974 Porsche 911 2.7 (The Manhattan project) viewtopic.php?f=28&t=51455
1973 VW 914 1.7 Olympic Blue - ( gone to a good home )
911hillclimber
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Re: 1972 Honda CB175 Super Sport restoration

Post by 911hillclimber »

Thanks, but the sprays are all motorcycle shop specials, maybe that refines things?
The metallic came from RS Bike Paints along with the clear top coat, the clear on the tank is a 2K tin I bought ages ago and didn't use, can dated 2016.

All this lot are rattle cans, sprayed in the garage, no heaters etc all done with fingers crossed.
It is not perfect, doing the black and white side details was tedious masking but it good enough for me.
The pro job I had done 4 years ago in candy gold was perfect, just perfect, but jeans rubbing on the tank sides will soon mark things up.

I hope when hardened in 10 days time it will be robust!

This bike is being done as a user, the gold one I did was a self challenge to do the very very best I could achieve almost regardless of cost which was great for the very happy man who bought it!

Really stuck until I get the chrome back in 2 weeks time.
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Re: 1972 Honda CB175 Super Sport restoration

Post by 911hillclimber »

Back off a tour of Scotland, so a few hours in the garage with the Honda.
Clear coats all rock hard after standing for 8 days, so added the 'Honda' tank badges to lift my mojo.
Pleased that I've don this lot for £90 and saved the original badges, too easy to by the slightly wrong repro badges.

Chrome man is silent.

Petcock came all the way from China and id wrong, one outlet, should be 2 :roll:

Original side panel badge also here now from the USA. Looks good, needs a re-paint, but I need another, so plan to use the USA original as a pattern for a silicon mould and resin cast another and paint that (they are non-handed).
You cannot get new ones and originals are hyper rare. If this works I might cast/paint a few and sell them.

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Re: 1972 Honda CB175 Super Sport restoration

Post by 911hillclimber »

Some big moves forwards on the bike for a change.
Collecting the chrome on Tuesday :shock:

The materials to make myself some side panel badges arrived, silicon mould chemicals and casting resin to make the parts. I was sceptical about this approach, be easier to buy some rattly originals in the USA, but that would be easy, and £90 each.

I have one stripped original which after cleaning I used as a piece to be moulded. Bought a kit off ebay for £23 and made a tight fitting casting box.
Mixed the silicon and gently poured it into the casting box slowly so allowing any trapped air to leak out. The badge is quite detailed, and most people do this work with a vaccume chamber which of course I don't have.
Mould cured in 24 hours and removed the original part. The detail in the mould looked very sharp from the bits I could see, so while it was super clean I mixed the cast resin and poured the first slug into the mould. The mix sure gets HOT, but after cooling and removal the part had two voids where air was trapped, but the detail on the casting was superb!

Encouraged, cast another with a slope on the flimsy mould and dribbled the resin mix in to the point the mould was flooded and waited.

It came out perfect! Really good, so cast some more to the same effect, I'm in production almost!

Made the reflector 'jewels' from trailer reflectors which will be glued onto the painted badges soon as the chrome paint arrives, Flat white and flat satin black applied with a fine sable brush will finish them off.

Result! :drunken: Cost £26 and I have spares to keep or sell.

Also cleaned and trial fitted the twin exhaust systems which fit like a glove. They came with the bike and have saved me about £450.

The chrome arriving will march to bike on hugely.

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Gary71
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Re: 1972 Honda CB175 Super Sport restoration

Post by Gary71 »

Looks great Graham. Always nice to make things!

I guess you will use both new badges to avoid any mismatch in finish from chrome paint etc?
911hillclimber
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Re: 1972 Honda CB175 Super Sport restoration

Post by 911hillclimber »

Yep, I have cast 5 badges and have the original. Will use 2 cast ones on this rebuild so they match.
There is a bit of shrinkage, about 0.25mm in 40mm to the original in the mould and the casting, but nothing to fret over.

Very satisfying I have to say and epitomises what I wanted from this little project. Spend spend spend is just too easy and what I did with my gold Honda.

This one is no Tool Room restoration, just a nice (I hope) rebuild to a clean useable bike.

Chrome is £340, was quoted up to £1300 ish by some, so I have to forgive the one-man-band I'm using a bit.
Paint was £600 last time, mine was £90.
Doing it as tight as I can is quite a task, but just as rewarding to get things done cheaply, which usually means DIY as you well know. :)
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Lightweight_911
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Re: 1972 Honda CB175 Super Sport restoration

Post by Lightweight_911 »

.

Excellent result Graham !! :cheers: :cheers:

.
Andy

“Adding power makes you faster on the straights;
- subtracting weight makes you faster everywhere”
911hillclimber
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Re: 1972 Honda CB175 Super Sport restoration

Post by 911hillclimber »

Thank you Andy, I know you like a bit of car diy too, these will look great when painted with a steady hand...
Most satisfying.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
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Re: 1972 Honda CB175 Super Sport restoration

Post by 911hillclimber »

An hour or so with Humbrol paints and a fine brush has the badges all done.

I have come to the conclusion there is NO chrome paint that works, so having found out the hard way that Humbrol paint reacts with 'chrome' paint I reverted to my trusty UPOL paints.
Etch primered the 4 cast badges and sprayed them Wheel Silver, a can I had in in 'stock'.

After a few hours and a flu jab later the silver paint was cured, and I have two coats of Humbrol matt white and satin black in place.

These look ok about 12" away, but no closer! However, will do a treat on this re-build bike.
Will adhere them to the side panels with clear silicon once I find some and they are all done.

Still puzzled over the wiring of this little simple bike, conflicting opinions on the voltage regulator and routing of the loom by the tank. the Haynes manual diagram does not show a voltage reg at all..

Tank now has a nos Honda dual outlet petcock at a huge £40, but will be leak-free,
Can't wait to get the chrome back as so much will happen with those parts to hand.

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73T 911 Coupe, road/hillclimber 3.2L
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911hillclimber
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Re: 1972 Honda CB175 Super Sport restoration

Post by 911hillclimber »

Thanks for those links, read the first one myself this afternoon waiting for paint to dry!
Many of the components I have don't stretch to the matching connectors on the loom, will spend a few hours I suspect trying to find the easiest path to place the loom on the frame tomorrow.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
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