Author Topic: Saving A CB350F  (Read 11716 times)

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Offline mwvachon

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Saving A CB350F
« on: October 03, 2017, 06:34:55 PM »
Starting a thread to track this build. I'll confess, I've had this bike a few years, but only in the past year have I made any attempts to get this project going. Bike is completely disassembled at this point, engine is on the bench and the top end is peeled off. I've already bought a ton of parts that I noted needing replacement as I stripped the bike down. Body work is at the paint shop - and I'll tease the fact that I'm not sticking with the original color... This is a snap of what it looked like when I found it:
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Offline mwvachon

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Re: Saving A CB350F
« Reply #1 on: October 03, 2017, 06:48:14 PM »
One huge bonus with this find was the fact that the bike was complete - including the factory exhaust. When I looked it over for purchase, I checked the mufflers for any sign or rust or rot. Was keeping my fingers crossed that they'd clean up well... you be the judge!
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Online carnivorous chicken

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Re: Saving A CB350F
« Reply #2 on: October 03, 2017, 07:41:46 PM »
Nice, and that exhaust is killer!

Offline HondaMan

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Re: Saving A CB350F
« Reply #3 on: October 03, 2017, 08:03:12 PM »
One huge bonus with this find was the fact that the bike was complete - including the factory exhaust. When I looked it over for purchase, I checked the mufflers for any sign or rust or rot. Was keeping my fingers crossed that they'd clean up well... you be the judge!

Those are GORGEOUS! What I wouldn't give to have a set like that on my 350F...so jealous!  :D
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

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Offline SOHC4 Cafe Racer Fan

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Re: Saving A CB350F
« Reply #4 on: October 03, 2017, 08:44:17 PM »
Sparkly!
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline MauiK3

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Re: Saving A CB350F
« Reply #5 on: October 03, 2017, 10:28:02 PM »
Great to see one of the 350s get saved
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline WhyNot2

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Re: Saving A CB350F
« Reply #6 on: October 04, 2017, 06:10:52 AM »
Looks great, same as HondaMan, wished I had some of those too.

Some day I'll ride my 350......
If it ain't raining, I'm riding.....~~{iii}?~~prost

If it sounds like I know what I'm talking about, it's because I cut and pasted from someone else.

Offline mwvachon

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Re: Saving A CB350F
« Reply #7 on: October 04, 2017, 06:13:54 PM »
This is what it looked like with a simple wash (prior to tear-down) Both fenders are toast, as are the handlebars, the headlamp ring, and may other shiny bits. I've been able to locate pretty much everything I needed, including the rear grab rail. The original one cleaned up ok, but was just not up to my standards for such a highly visible part - I sourced a new reproduction unit from CMS. If you look closely, the lower fork cover on the right side of the bike actually belongs on the left side. There is a cutout that was made to clear the disc brake hardware in the event of a deep dive of the forks. This should have been a tip-off for me, but I didn't put 2 + 2 together until I was breaking down the forks and steering head. Someone had already installed tapered bearings for the steering head! not upset about that at all, but need to pay attention when putting this back together...
« Last Edit: October 04, 2017, 06:18:53 PM by mwvachon »
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Offline mwvachon

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Re: Saving A CB350F
« Reply #8 on: October 04, 2017, 06:25:43 PM »
Oh, and another interesting bit (for me, anyway)! This dealer tag shows this bike was sold at a dealership that used to be just down the street from where I grew up and where my Dad & I bought several new bikes. Dad bought a 1969 S90 from them, his first bike @ age 38! He soon bought a 1971 CB750 (the candy gold family heirloom that I have now). I bought my first bike from them, a '71 CT70-H (the 4 speed/clutch model, no sissy 3 speed auto for this kid!) @ age 13. I'm hoping to be able to create a duplicate of this dealer tag and put it on the 350F when its done...
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Offline Rocky2010

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Re: Saving A CB350F
« Reply #9 on: October 04, 2017, 08:29:47 PM »
Nice original bike, I would just do a clean up on it and ride it.
I have an original 1972 CB350f with the standard pipes all I needed to do was replace the fork seals give it a bit of a Tune, clean the carbs, new carb manifolds and its a runner nice bike to ride also have an original CB500 as well me and my partner take them out on various occasions and she really likes the CB350f because its light and nimble to ride.
2010 Harley Fatboy Lo
1972 Honda CB750/4 Under Restoration
1971 Honda CB500/4 Original Condition
1972 Honda CB350/4 Original Condition
1972 Honda XL250 Motorsport Under Restoration
1967 Honda C90 Original Condition
1968 Honda S90
1962 Triumph Speed Twin
1952 Triumph Speed Twin
1970 Bultaco Sherpa T
1971 Bultaco Alpina
1958 Moto Guzzi Zigolo
1970 Moto Guzzi Ambassador Original Cond
1973 Yamaha RD250
1948 Velocette x 2
1942 WLA Harley Davidson
2006 Kawasaki ZX12R (Sold)
1980 Corvette

Offline mwvachon

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Re: Saving A CB350F
« Reply #10 on: October 12, 2017, 05:27:02 PM »
Amazing week! I got the top end of the engine torn down over the weekend, but had to fight with the screws that hold the carb insulators onto the head. Not one of them would budge despite trying my best JIS driver bits, a JIS impact driver, or the down-n-dirty vice grips on the screw heads. I ended up drilling out the screw heads. Wouldn't you know it? The screws came out with my fingers once I knocked off the screw heads. GAWD I HATE THOSE JIS SCREWS! One surprise was the head gasket - it's 100% copper! I've never seen one of those. It's looks almost pristine, trying to find out if I can re-use it or not. Certainly looks more robust than the aftermarket unit I got in my gasket kit. Dropped the head and the cylinders off at my local machine shop yesterday morning. Kevin said it would be 2 or 3 days. He called later that afternoon and said they were ready! He did say he had to plane the head just a tiny bit as he found some irregularities. Otherwise these are ready for painting!
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Offline calj737

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Re: Saving A CB350F
« Reply #11 on: October 12, 2017, 07:48:06 PM »
i am only speculating but, I’d think if you annelaed the gasket, it could be re-used. At least I don’t see why not... :-\
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline mwvachon

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Re: Saving A CB350F
« Reply #12 on: October 14, 2017, 05:22:03 PM »
OK, I've been 'schooled' on this whole head gasket thing. What I thought was a solid copper gasket was actually a replacement head gasket that had a copper spray applied to it. A mechanic looked at this for me and pointed out a few things that confirmed this. So now I'm just going to replace this like it was a normal gasket.
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Offline mwvachon

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Re: Saving A CB350F
« Reply #13 on: October 14, 2017, 05:23:38 PM »
A shot of the cylinders - post machine shop work
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Offline mwvachon

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Re: Saving A CB350F
« Reply #14 on: October 14, 2017, 05:24:30 PM »
Talk about some tiny pistons...
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Offline spuds

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Re: Saving A CB350F
« Reply #15 on: October 15, 2017, 06:42:07 AM »
Oh, and another interesting bit (for me, anyway)! This dealer tag shows this bike was sold at a dealership that used to be just down the street from where I grew up and where my Dad & I bought several new bikes. Dad bought a 1969 S90 from them, his first bike @ age 38! He soon bought a 1971 CB750 (the candy gold family heirloom that I have now). I bought my first bike from them, a '71 CT70-H (the 4 speed/clutch model, no sissy 3 speed auto for this kid!) @ age 13. I'm hoping to be able to create a duplicate of this dealer tag and put it on the 350F when its done...

See....now THAT is cool!


Offline mwvachon

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Re: Saving A CB350F
« Reply #16 on: October 22, 2017, 04:52:39 AM »
...and here's the new color!
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Offline MauiK3

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Re: Saving A CB350F
« Reply #17 on: October 23, 2017, 09:26:06 AM »
Very nice, lots of sparkle in the color! Everyone knows we can't resist shiny sparkly things!
Keep pictures of the resto coming. I love the little 4's, I've often thought I'd do one after my 750 is done. The trick is to find a good one to restore.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline WhyNot2

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Re: Saving A CB350F
« Reply #18 on: October 23, 2017, 09:45:10 AM »
...and here's the new color!

Did you paint those parts?
If it ain't raining, I'm riding.....~~{iii}?~~prost

If it sounds like I know what I'm talking about, it's because I cut and pasted from someone else.

Offline SOHC4 Cafe Racer Fan

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Re: Saving A CB350F
« Reply #19 on: October 23, 2017, 12:09:59 PM »
That's mighty sparkly! I bet it will really shimmer in the daylight.
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline mwvachon

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Re: Saving A CB350F
« Reply #20 on: October 23, 2017, 06:47:50 PM »
I had a local shop paint these for me. I'm kinda color-blind, and I know I suck at paint. Some stuff you leave to the experts. The shop I used for previous projects closed up, so I had to hunt for someone to take this on. Many regular body shops won't touch this stuff, but the smart ones realize that work like this is good 'filler' when they are between jobs. The painter at this place is a bike guy and he knew exactly what I was after. I was not a fan of the original dark blue (almost black if you ask me) and had been looking around for other examples of restored CB350F's. I found a few examples that were OEM silver. From what I could tell, this looks like it was a Euro color. At any rate, I really liked it. Of course there are no color codes, and I never expect to see another silver CB350F roll up next to this one, so I went with what was in my imagination. In speaking with the painter, I got talking about all the metal flake colors that used to be around in the 70's. He explained that he couldn't do that, but what he could do was amp up the metallic in the paint and make it resemble that. I looked at some paint chips (said the color-blind guy) and said 'Let's go for it!'. His boss was nervous, and agreed on the condition that I stop by once they completed the initial color and 1st clear coat to give a final approval. They would be scuffing the tank, applying the decal, and shooting the final clear coat after that. Needless to say, I really dig the way it came out. They fixed the dings in the tank and shot everything the same color. The only hiccup was a bit of dirt in the final clear coat on the tank, which the painter buffed out without a problem.
« Last Edit: November 16, 2017, 02:26:55 AM by mwvachon »
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Offline mwvachon

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Re: Saving A CB350F
« Reply #21 on: November 12, 2017, 05:02:21 AM »
Still moving along on this project. I get busy doing work and forget to grab some snaps of what's going on! Frame is now fully disassembled and ready for blasting. The original VIN tag is in rough shape, so thinking I'm going to replace with a repro unit. This battery box is a total PITA! From trying to figure out how to pull it from the frame (you gotta turn it just right and pull it out of the right side of the frame), to all the little grommets, and all the complex surfaces to sand blast - lot of effort for such a small piece of the puzzle! Pile of parts headed to the powder coat shop is growing...
« Last Edit: November 12, 2017, 05:04:21 AM by mwvachon »
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F

Offline wm6929

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Re: Saving A CB350F
« Reply #22 on: November 12, 2017, 08:04:37 AM »
Fantastic work.  350s are so cool.

Offline MauiK3

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Re: Saving A CB350F
« Reply #23 on: November 13, 2017, 08:42:18 AM »
I cast my vote for keeping the VIN plate as is. Gives that authentic touch.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline mwvachon

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Re: Saving A CB350F
« Reply #24 on: November 20, 2017, 05:49:21 PM »
Got the pesky shock bushings pressed out. Used the sockets method along with my bench vise, some penetrating oil, and a bit of heat. They wouldn't even budge until I hit the swing arm with the heat. Guess I should've sandblasted AFTER doing this. No worries, I see many places I missed...
M.W.Vachon
2014 CB1100 Deluxe
1999 Valkyrie I/S
1971 CB750-K1 (Candy Gold)
1971 CB750-K1 (Candy Red)
Project link: http://forums.sohc4.net/index.php?topic=108498.0]
1965 Honda S90
1976 GL1000
1975 CB400F