Author Topic: Project Inherited 1973 CB350F  (Read 3376 times)

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Offline Gibbit

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Project Inherited 1973 CB350F
« on: July 02, 2012, 07:06:26 AM »
Hello everyone!

Long time lurker first time poster here. I wanted to start a thread about my 1973 CB350F. I want to use this as a place to post the progress of changes to my bike and get some feedback from everyone and maybe some new ideas.

So a little about me quickly. My name is Mike and I'm currently in Raleigh, NC. I am an Infrastructure Specialist for a large global IT company. IT is my main love in life but bikes/cars are a very close second. I have always been an amateur mechanic since I was old enough to drive. However, I always had to work on my cars out of necessity and never for fun. So I'm really excited to start putting some work into my bike.

So on to the bike, this is why you guys probably clicked on this thread in the first place, right? Well it's a 1973 CB350F that has been in my family for the past 37 plus years. One of my dad's buddies bought it new back in 73 and made some modifications to it right from the start, you'll see what I mean when you look at the pictures. After a year or two my dad wanted a bike and my dad's buddy needed a car... so they traded. Since then my dad has had this bike for decades and sometimes it was his only mode of transportation. It has a little over 50k miles on it at this point. He gave it to me about 5 years ago and since then not much has changed until now. I didn't ride much and maybe only put about 1000 miles on it myself. But this summer I got the itch to start riding again but before I do I wanted to clean it up, do some minor restoration and make some changes.

So the reason I gave a little history about the bike is because what I plan to do with the bike is not crazy. I had thought about taking the cafe racer route but decided against it because this bike is basically a family heirloom to me and I don't want to get so crazy with any mods that it's not recognizable anymore as the bike I grew up riding on with my dad every summer.

Currently the motor runs strong. My dad and I cleaned the carbs real good a few weekends ago and afterwards the bike fired right up. We had to clean them because it sat for about 2 years without me firing it up or riding it at all so the carbs were definitely gummed up. I was uneducated enough at the time to not drain the gas before letting it sit. It runs really well for the age and mileage in my opinion. My dad kept up on the maintenance and knows this bike in and out after 50k miles of riding and maintenance over a few decades. So essentially the motor needs little to nothing at the moment. I plan to do a complete rebuild of the carbs at some point but it’s not at the top of the list since the bike runs so well currently.

The first things to go were the forks. As you can probably tell the front forks we're not stock length. They we're about 10 inches over the stock length to give it a sort of chopper look. This was a problem for me though since I am a measly 5'6". I honestly could barely touch the ground when sitting on the bike and had to tip-toe to keep it upright. That was a little scary for me out on public roads. I just didn't feel very stable. Plus I think the longer forks impacted the handling negatively. So I put on a set of stock length CB400F forks and immediately the bike was lowered a bit from its former state and felt way more comfortable to me. It's still a bit tall for my height to be honest, but 10 times better than before.

Future plans include but are definitely not limited to the following:

- Replacing most of the cables. The front brake hoses and speedometer cable for example are way too long after dropping the front end back down.
- Replacing the clutch springs (EBC or Barnett, haven't decided yet). The clutch feels like there is a bit of slippage under load and my dad had already put shims under the springs which are still the original springs from 73.
- Replacing the seat and removing the sissy bar. I actually like the look of the seat / sissy bar on this bike, but the seat has seen better days and I like the look of some of the cafe style seats available out there. I don't like the look of the stock seats so much though.
- Replace the handlebars. I love the buckhorn style bars that are on there now.  They are very comfortable and give it a unique look.  However, I want to try some bars that are slightly more stock in look and feel.  I have already started on the bars and will have a follow-up post about that shortly.

So those are some of the changes planned so far in addition to replacing a ton of little pieces here and there (clutch and brake levers, rear fender, nuts / bolts, new front tire, etc...).

I'm going to try and keep this post up to date as I make changes and replace things. I'd love to know what you think of the bike in its previous form and any ideas for future upgrades or tweaks.  I’m open to any questions or comments.

Lastly, I'd like to say that this forum is amazing! There is far more interest and activity regarding these Fours than I thought I would find. I had searched the internet for quite a while, looking for resources and help with regards to my 350 and came up short for a while. When I found this site / forum I stopped looking. I've been browsing this site for almost a year now just reading and getting excited to work on my bike but rarely ever felt the need to create a new post since almost every question I had was already answered by searching the forums.

Thanks guys and see you around the forums!









« Last Edit: July 02, 2012, 08:19:14 AM by Genesee »
My Inherited 1973 CB350F Project:
http://forums.sohc4.net/index.php?topic=109351.0

Offline kerryb

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Re: Project Inherited 1973 CB350F
« Reply #1 on: July 02, 2012, 07:19:12 AM »
Welcome to the forum Mike.  You have a classic heirloom on your hands, make sure you have plenty of pictures of the "before", because it is a great story still in the making.  Someday your kids may want to recreate the "chopper" days.  Keep us posted and by all means, have fun with this.
intrigued by the wail...seduced by the scream.

Offline flybox1

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Re: Project Inherited 1973 CB350F
« Reply #2 on: July 02, 2012, 07:30:55 AM »
Looking past those bars, forks, Paisley seat :o and backrest, you have a diamond in the rough on your hands ;D
good luck with your project and welcome to the forum
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
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"Knowledge without mileage equals bullsh!t" - Henry Rollins

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Offline tortelvis

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Re: Project Inherited 1973 CB350F
« Reply #3 on: July 02, 2012, 08:46:42 AM »
Welcome from an ex Raleigh resident now in the Asheville area. If you need anything give me a shout as I have an almost complete donor bike  for my own CB350F project. Have an excellent stock seat if you go that route. Good luck.

Offline Gibbit

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Re: Project Inherited 1973 CB350F
« Reply #4 on: July 05, 2012, 02:02:29 PM »
Thanks for the welcome guys.  I made a little progress yesterday on the 4th during my day off.  I finished putting on the new handlebars and got everything wired and hooked back up.  No pictures yet, but I should have some this weekend.

Tortelvis, I will definitly hit you up in the not too distant future to let you know what I'm looking for.  I'm slowly but surely putting together a list of things I want or need to swap out that I can't get aftermarket or NOS.
My Inherited 1973 CB350F Project:
http://forums.sohc4.net/index.php?topic=109351.0

Offline Gibbit

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Re: Project Inherited 1973 CB350F
« Reply #5 on: July 15, 2012, 10:49:51 AM »
So I finally got around to taking some pics of the new handlebars.  They are much closer to stock although slightly wider I believe.  They give the riding position a little more aggressive stance than the buckhorns, but still a little relaxed too.  Drilling them for the wires was a lesson in patience which I seem to be a little short of.  I measured no less than 10 times before drilling and I still think the controls are rotated back a little more than they should be.  It's doable, but not ideal.  Rather than take them apart and drill again, I think in the future I'll replace them with the 400F bars, but these will do for now.  I like the lower 400F bars, but was hesitant about going that low to start with since I'm not building an all out cafe racer here.  I think they will be perfect though later on.

The new bars definitly don't match the seat and sissy bar now.  The seat is on order and should be here in about a month or so.

Along with the handlebars I also replaced the following:

Clutch cable
Tach and speedometer cables
Front brake hoses and steel line
Russell speed bleeder
Dogleg clutch and brake levers
Lower housing on the left side controls

The lower housing on the left side controls had the clutch perch grinded off a long long time ago.  There was an aftermarket perch on there for I don't know how long that moved the clutch lever inwards about an inch or two.  I quite surprisingly found just the lower housing by itself on ebay in new condition.  It was an aftermarklet cast, not NOS, but it matched up perfectly. 

Up next are a new front tire, replace fork seals, rearview mirrors and the seat when it comes in.







My Inherited 1973 CB350F Project:
http://forums.sohc4.net/index.php?topic=109351.0

Offline Gibbit

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Re: Project Inherited 1973 CB350F
« Reply #6 on: September 01, 2012, 01:57:32 PM »
It's been a while since I've made any updates here.  Been a busy coupe of months, including moving into a new place, hence no updates in a while.

So the most recent updates are:

New cafe style seat
Lucas style tail light
OEM style mirrors and levers

The seat came from hondaclassic31. I think he did a great job with the seat.  The quality is top notch from the seat pan to the stitching.  All the hardware bolted right up and it came exactly as described.

The tail light came from dimecitycycles and I love it.  It's a huge improvement over the taller one that was on there before and looks a whole lot better than the OEM in my opinion.  I had to drill even more holes in the rear fender, more than I'd like to have but it was a pretty easy install.  I am planning to replace the rear fender at some point.  Right now there are a total of 10 plus holes drilled in it from different tail lights over the years, haha.

I had some trouble deciding on the mirrors but as you can see from the pics I eventually just went with OEM style mirrors.  I tried some smaller / cheaper "cats eye" type mirrors but they were way to small and the stems were far too short so all I could see was my shoulders at best.  These OEM style ones came from dimecitycycles also and they're perfect.  They look nice, feel solid and are all steel unlike some cheap aftermarkets that are ABS.

So I think it's looking pretty good and can't wait to get it out on the road.  It's hasn't been ridden out on the road yet this summer because I've been way too lazy to get it registered and inspected.  Those 2 things will be next so I can get some ride time in...  Also need a new front tire too, the one on there now is pretty dry rotted.

Enjoy the pics:







« Last Edit: September 01, 2012, 02:19:08 PM by Genesee »
My Inherited 1973 CB350F Project:
http://forums.sohc4.net/index.php?topic=109351.0

Offline srbakker

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Re: Project Inherited 1973 CB350F
« Reply #7 on: September 01, 2012, 03:39:23 PM »
That's a nice looking seat!
1975 CB750 K5
2007 Triumph Tiger
2007 Triumph Speed Triple
1971 Kawasaki F7 175 Enduro
2000 Honda VFR800 (gone but not forgotten)

Offline Gibbit

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Re: Project Inherited 1973 CB350F
« Reply #8 on: May 25, 2017, 06:43:56 AM »
After 5 years I finally dusted off the CB350F and got her back on the road.  Not a lot has changed in the looks department.  New headlight bucket and mini gauges installed and chrome polished up a bit with the old aluminum foil and Coke trick, which works miracles if I might add.

A handful of bolt on updates since pulling her out of the shed:

Regulator / rectifier combo unit
TruGel Battery
EBC clutch friction plates and springs
Rebuilt master cylinder and front brake caliper
Coils, wires, plug caps and spark plugs
Front tire
Oil and filter change
Air filter
Front fork oil seals
Replaced 80% of the old electrical connectors with new bullet style connectors
And a handful of other small things (gas cap latch, new rubber in a bunch of places, etc...)

The biggest change so far were the coils/wires/caps/plugs.  I'm pretty sure the coils/wires/caps were the original from the factory setup.  They were old and brittle, one cap was held together with electrical tape.  After the swap she felt like a brand new bike.  The butt dyno was off the charts the first time out after that.

For now I think I'm going to just enjoy the ride for a few months.  Next up will be a complete carb rebuild.  They are not in bad shape as it is, but I have small leak from one of the float bowls and I'm sure there is a little gunk in there from sitting for so long, but it's too nice out right now to tear it apart and miss out on some good riding weather.

« Last Edit: May 25, 2017, 06:45:36 AM by Genesee »
My Inherited 1973 CB350F Project:
http://forums.sohc4.net/index.php?topic=109351.0