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Author Topic: CB350f now CB466f  (Read 1047 times)

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Offline Erwin83

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CB350f now CB466f
« on: March 30, 2017, 06:45:20 am »
Hello fellow CB enthusiasts,

I've been owner of this Honda CB350f for a long time, right about 13 yrs). It was my first love after getting my bike license at the age of 20 and I've never had any reason to part with her.
"Restauration" is coming close to the end now, so I'm researching a few things about tuning / setting up ignition and carburation.
Hope to find a lot of information here, and potentially sharing a few of my experiences.

This is her:






I've done almost everything myself:
- Frame coated (had it done obviously)
- All parts going on cleaned and checked for wear and tear, renewed when needed.
- Brakes refurbished
- Forks refurbished
- Hagon's at the rear, but those have been placed over 10 yrs ago already
- Wheels refurbished and painted black (rear 1.85 rim on the front hub)
- Heidenau K36 (3.50 front, 4.10 back)
- Pigwatcher on the left bar

- CB400f engine and carbs (lost the 350 to a lean mixture)
- 4-2 exhaust with open cans (finally lost the 4-4 to rust)
- Shortened fenders front and back
- Small tail light
- Giuliari seat with new bespoke cover. Original with a twist.

It's not a cafe-racer, it's not original, it doesn't go in any frame. It's just my CB to my specs.
Hope to find loads of help and tips here, and potentially share a few of my experiences along the way.
« Last Edit: January 06, 2020, 07:03:42 am by Erwin83 »
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline Erwin83

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Re: CB350f in Netherlands
« Reply #1 on: May 01, 2017, 07:12:09 am »
Spring is in the air:








CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline Erwin83

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Re: CB350f in Netherlands
« Reply #2 on: May 01, 2017, 07:13:39 am »
Valve clearance set
ignition contacts replaced
Synchronized the carbs

It turned out she was really waaaaay out of sync.
What a difference this makes!

I think i have the sync quite well now:

https://goo.gl/photos/MgckXHc2oFSr8Ygt5

Idle is good. Revs are good.
Nice popping and brapping in the exhaust when throttle is closed.

Only improvement should be the pick-up from idle to throttle. It feels like it dies and needs some throttle play to run in revs.
So will try a richer mixture screw position first.
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline flatlander

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Re: CB350f in Netherlands
« Reply #3 on: May 01, 2017, 07:26:40 am »
popping in the exhaust could still be a lean condition. or holes...
groetjes uit amsterdam!

Offline flybox1

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Re: CB350f in Netherlands
« Reply #4 on: May 01, 2017, 10:20:19 am »
popping in the exhaust could still be a lean condition.
+1

Welcome to forum.  8)
Now that your sync is perfect, go to an idle plug chop and get your air screws dialed in for tan plugs.
Should be no popping on decel.
'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)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline Erwin83

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Re: CB350f in Netherlands
« Reply #5 on: May 01, 2017, 11:38:28 am »
Thanks for the advice flybox and flatlander. The bad pick-up from idle also pointed towards a lean mix. Didn't know backfire was also a give away for lean running.
I'll be turning the mixture screws in asap, and come back with results.
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline flybox1

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Re: CB350f in Netherlands
« Reply #6 on: May 02, 2017, 06:39:06 am »
Thanks for the advice flybox and flatlander. The bad pick-up from idle also pointed towards a lean mix. Didn't know backfire was also a give away for lean running.
I'll be turning the mixture screws in asap, and come back with results.
Doesnt always point to a lean mix, but it does scream A/F ratio is off.  Dont assume it is too lean.
As mentioned, a 5 minute idle plug chop will TELL you whats going on. ;D
'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)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Online RAF122S

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Re: CB350f in Netherlands
« Reply #7 on: May 05, 2017, 11:50:13 pm »
Welcome to the forums, nice looking bitsa 400/350f 
Lovingly built no doubt.  What is a pigwasher?
David- back in the desert SW!

Offline Erwin83

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Re: CB350f in Netherlands
« Reply #8 on: May 22, 2017, 10:53:19 am »
Welcome to the forums, nice looking bitsa 400/350f 
Lovingly built no doubt.  What is a pigwasher?

Thanks.
A pig watcher. Pig = cop / police officer.
Pig watcher is a bar end mirror basically  8)
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline Erwin83

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Re: CB350f in Netherlands
« Reply #9 on: May 22, 2017, 10:56:47 am »
Mix turned out to be rich. Matt black plugs and lots or carbon deposits around the exhausts... Way to easy cold start without choke...

Changed the float level to 24mm now..... And I've got reliable idle!
Also a nice coffee brown color on the plug.

Still with a hot engine (seriously hot), it drowns on pick up from idle to any throttle.
Will look into the air screws a bit see what that does.

Out playing with a bigger sister yesterday:

CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline Erwin83

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Re: CB350f in Netherlands
« Reply #10 on: June 26, 2017, 12:48:54 am »
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline Erwin83

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Re: CB350f in Netherlands
« Reply #11 on: January 06, 2020, 06:47:35 am »
Time for an update  :o:

My bike started to leak oil again last summer, quite heavily really, seaping from the headgasket (O-rings) and the cylinder base gasket.
For a long time, I had the idea in my head to go for a big bore kit one day, and I thought this was a good moment, considering that the barrels had to be pulled anyways.

I ordered the set from Forseti, which gives a 466cc result.
Long story short: In the last 2 months, I installed the kit, freshed up the head, painted some stuff, and the bike's running again.

First start:
Second time running (first time getting some temperature in the engine):

« Last Edit: January 06, 2020, 06:50:53 am by Erwin83 »
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline Erwin83

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Re: CB350f in Netherlands
« Reply #12 on: January 06, 2020, 06:58:50 am »
Parallel to the engine top-end rebuild, I started an exhaust project.
Ever since I lost the original 350f 4-4 exhaust to rust, I wanted one back. The 4 pipes just makes the little pocket rocket look so much faster and more exotic...
Sure, a new one is for sale, but:
1) Quite silent (the noise of the 4 small cylinders is one of the thrilling features of the CB, if you ask me)
(be reminded the before finally pulling the plug, I used to ride around with the rotten silencers).
2) Quite expensive.

So, I decided to make my own. Learn some (mig) welding along the way.
First I put 2 silencers on the original exhaust hangers, just slightly modifying them with one extra hole.
Then make connecting pipe (header-silencer) out of PVC (drainage pipes)
Followed by copying the PVC into steel pipe (35 mm x 1,5 mm)
Followed by painting it in exhaust paint and cooking in the oven.

repeat x4
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline Erwin83

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Re: CB350f in Netherlands
« Reply #13 on: January 06, 2020, 07:01:14 am »
I could not be happier about the result  :-*
« Last Edit: January 06, 2020, 07:03:05 am by Erwin83 »
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline flatlander

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Re: CB350f now CB466f
« Reply #14 on: January 06, 2020, 09:27:11 am »
not bad. i'll give you a call if i need new headers  ;)
i agree that the 4-4 adds some class on these bikes, that almost justifies the added weight.

Offline Erwin83

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Re: CB350f now CB466f
« Reply #15 on: January 06, 2020, 09:55:25 am »
not bad. i'll give you a call if i need new headers  ;)
i agree that the 4-4 adds some class on these bikes, that almost justifies the added weight.

 ;D
I hope the extra 116cc will carry the weight and performance will not be influenced negatively.
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline carnivorous chicken

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Re: CB350f now CB466f
« Reply #16 on: January 06, 2020, 11:06:51 am »
very nice!

Offline web

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Re: CB350f now CB466f
« Reply #17 on: January 06, 2020, 11:54:36 am »
Very pretty. Just cut down on beer and kroketten now to compensate the weight  ;D

Offline tool14

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Re: CB350f now CB466f
« Reply #18 on: January 06, 2020, 12:45:50 pm »
welcome aboard.

Offline Erwin83

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Re: CB350f now CB466f
« Reply #19 on: January 06, 2020, 01:00:53 pm »
very nice!

Thanks!

Very pretty. Just cut down on beer and kroketten now to compensate the weight  ;D

Yes sir   :P


welcome aboard.

Thanks in retrospect  :D
(I opened the topic in ‘17 already, time flies)
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

Offline rupaulpierce

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Re: CB350f now CB466f
« Reply #20 on: January 12, 2020, 12:03:53 pm »
Love it, any other cb350/400 out there? I want to join the cb350/466 club...

Offline seanbarney41

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Re: CB350f now CB466f
« Reply #21 on: January 12, 2020, 06:21:54 pm »
really nice bike!
If it works good, it looks good...

Offline Erwin83

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Re: CB350f now CB466f
« Reply #22 on: January 16, 2020, 05:16:22 am »
Thanks both!
CB466f - Guzzi V35 Scrambler - Aprilia Falco nuda

 

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