Author Topic: 1973 CB350F "Modest Original" build  (Read 101603 times)

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Offline grcamna2

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Re: 1973 CB350F "Modest Original" build
« Reply #425 on: August 22, 2016, 07:44:24 AM »
Atlas,
I thought I'd use your "Honda in a box" idea and see if you could take some wood and build yourself either an engine stand where you could bolt your engine into the motor mount bolts or possibly find a strong wooden box/crate already built and modify it to accept your engine top crankcase upside down w/ the cyl. studs sticking downward through it  :)

Honda in a box...I'll try it!

Atlas,
 Possibly an engine stand made w/ 2 x 4's screwed together and then using steel 'L' brackets screwed down onto the 2 x 4's to mount the engine mount holes.You could use a cordless screw gun w/ short drywall screws to assemble it and if desired unscrew it all to store it until needed next time;make a pattern to number the support pieces to make assembly simple next time. imo
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #426 on: August 22, 2016, 07:53:20 AM »
Atlas,
 Possibly an engine stand made w/ 2 x 4's screwed together and then using steel 'L' brackets screwed down onto the 2 x 4's to mount the engine mount holes.You could use a cordless screw gun w/ short drywall screws to assemble it and if desired unscrew it all to store it until needed next time;make a pattern to number the support pieces to make assembly simple next time. imo

That sounds REALLY FUN!! I will pick up some 2x4's and give it a shot.  About time I got into making stuff like that...wish me luck!  Thanks for the idea grcamna

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #427 on: August 31, 2016, 07:08:34 AM »
I did it!  Here's how it went...

Attempt 1: (Highlighting my lack of carpentry skills...)





This was the plan.  Build something which would screw into the top crankcase holes and allow me to flip the engine on it's head, without having to remove the studs or have weight resting on them.  Apologies for the terrible drawing...anyways I went to the store and picked up some M6 bolts and a 2x4.  Here's where it got me.









A decent idea, in theory, maybe, but plagued by a lack of patience, skill, and forethought.  I was rushed, frustrated, and unhappy with how this was coming out.  I couldn't for the life of me get all those wholes to line up because I was rushing and measuring so haphazardly.  I am sure the above will be of much disgust to you more experienced fabricators.  Discouraged, I went to bed.



Attempt 2: (Now we're talking!)

I woke up the next day ready to tackle this bad boy.  I had a new found respect for the drill and chop saw.  With some patience, I knew I'd be able to get this done.  The bolt idea was pretty bad.  I was not happy putting the entire weight of the engine on those small threads.  I came up with a new, simpler plan to rest the engine on a spot between the connecting rods, in between the studs, and a flat spot towards the back of the engine.  I had used most of my 2x4 on the previous bad idea but did what I could with the scraps.



I added some legs to stabilize.



Test fitting.



I then placed the make-shift stand on the ground, carefully flipped the engine, and set her down.  Voila!





What an AWESOME feeling!  Yes, it may not be the sturdiest.  Yes, it was not that difficult to build.  Yes, there are most certainly better designs and engine stands.  But most importantly, this one was MINE!  And it WORKED!!  Thank you grcamna for the idea.  I will would've had the thing sitting on apple boxes if it weren't for you!



Now onto the disassembly.  The crankshaft came out without much trouble.



I removed the connecting rods, timing chains, and gears.



Then onto the shift arms and mechanism.









And that was about it!







The cases were split and the stand served me well.  It wasn't the most secure thing in the world but it allowed me to do a job I otherwise wouldn't have been able to.  Here is the completed "Honda in a box" ...





She's looking pretty good!  This is as far apart as she will (and possibly can) get.  I am excited to have this phase "Completed" - now I move on to inspection, restoration, and then reassembly.  Exciting!  Thank you ALL for sticking with me this long.  That crankcase split was far from perfect and at times I really felt like a babbling idiot.  Nonetheless, here we are.  More to come!  :D

Offline grcamna2

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Re: 1973 CB350F "Modest Original" build
« Reply #428 on: August 31, 2016, 08:10:38 AM »
Now you have a place to 'prop-up' your CB350F engine upside down;how do those side legs on the bottom work,do they add a little stability ?
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #429 on: August 31, 2016, 08:41:52 AM »
Now you have a place to 'prop-up' your CB350F engine upside down;how do those side legs on the bottom work,do they add a little stability ?

Surprisingly, they work quite well!  I drilled ad-lib pocket holes and affixed the "legs" with drywall screws.  They keep the thing upright without much trouble.  I was worried they would bind or collapse and considered adding a brace on top to keep them from doing so but they haven't seemed to need it.  The top case doesn't weigh much at all with everything out and it should do okay for storage.  Thanks for the inspiration!

Offline grcamna2

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Re: 1973 CB350F "Modest Original" build
« Reply #430 on: August 31, 2016, 12:07:01 PM »
That looks like a wheel from a vintage Pontiac? on that blue car in one of your garage pics;what is it ?
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline SOHC4 Cafe Racer Fan

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Re: 1973 CB350F "Modest Original" build
« Reply #431 on: August 31, 2016, 12:19:22 PM »
Ingenuity!  Not exactly earthquake proof, but that'll work!
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 iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #432 on: August 31, 2016, 12:24:09 PM »
That looks like a wheel from a vintage Pontiac? on that blue car in one of your garage pics;what is it ?

'79 MGB, she'll run tonight if all goes well.  Now that's been another handful...sorry for the lame pics





Ingenuity!  Not exactly earthquake proof, but that'll work!

Hah...I'll take it!

Offline MoMo

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Re: 1973 CB350F "Modest Original" build
« Reply #433 on: August 31, 2016, 05:24:38 PM »
Looks a lot like most mechanics......................too many projects at once.  I only have 6 or so. ???

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #434 on: September 01, 2016, 07:35:43 AM »
Looks a lot like most mechanics......................too many projects at once.  I only have 6 or so. ???

Hah.. Thanks MoMo!  I'll take that as a compliment  ;)  Good luck with the sale on a few of your bikes, I hope it is to fund more than the measly 6 you have going on!!  :P  ;D  ;)

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #435 on: September 28, 2016, 07:57:41 AM »
Feeling a little lost but eager to dig in, whats next?   :)


Offline grcamna2

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Re: 1973 CB350F "Modest Original" build
« Reply #436 on: September 28, 2016, 08:41:23 AM »
Hi Atlas,
How've you been ? I think the next thing you can do is clean up all the individual components and then carefully inspect them i.e. crankshaft,trans.,etc. Did you do a compression test before you took it apart ?

I think you should spend some $ on getting your cylinder head checked including all the valves,guides,etc. and clean all the ports out real good,unless you will be doing that yourself.
« Last Edit: September 28, 2016, 05:12:25 PM by grcamna2 »
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #437 on: September 28, 2016, 08:49:36 AM »
Been doing well!  Thanks for asking :)  Hope you can say the same.  Busy with this little guy, just added him to the collection recently!  1970 R50/5...







She is sweet.

D'oh! No compression test.  I guess I'll get cleaning!! Time to pull the mic and dial bore gauge back out...thanks for the direction grcamna!


Offline grcamna2

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Re: 1973 CB350F "Modest Original" build
« Reply #438 on: September 28, 2016, 05:13:30 PM »
That 1970' R50/5 is it original ? Nice Beemer.
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #439 on: September 28, 2016, 07:07:16 PM »
Yes! 23k on the ODO, believed to be original.  Last thing we needed was another project...but luckily this ol girl doesn't appear to be one...at least not yet.  She's all ORG and we'll keep her that way!

Offline MoMo

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Re: 1973 CB350F "Modest Original" build
« Reply #440 on: September 29, 2016, 07:32:16 PM »
Very nice find Atlas, enjoy....Larry

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #441 on: September 29, 2016, 07:50:24 PM »
Very nice find Atlas, enjoy....Larry

Thanks Larry!  Lucky to have her :)

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #442 on: November 01, 2016, 12:24:04 PM »
Ultrasonic cleaner!  Now this should be the kick in the bum I need to clean all these parts :)







Amazing little tool.  30 minutes a side and they are good to go!  All nooks, crannies, and crevices.  Much better than laboring over that those hideous chemicals...

Offline grcamna2

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Re: 1973 CB350F "Modest Original" build
« Reply #443 on: November 01, 2016, 01:09:06 PM »
Atlas,
Did you use the Simple Green Purple HD stuff? what ratio,50/50 ?
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #444 on: November 01, 2016, 06:57:17 PM »
Atlas,
Did you use the Simple Green Purple HD stuff? what ratio,50/50 ?

Yes! Current mix is about 4:1 water:simple green, would up it but ran out of the stuff!  Working great so far.  What an awesome piece of kit  8)

Offline grcamna2

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Re: 1973 CB350F "Modest Original" build
« Reply #445 on: November 01, 2016, 07:05:45 PM »
Atlas,
Did you use the Simple Green Purple HD stuff? what ratio,50/50 ?

Yes! Current mix is about 4:1 water:simple green, would up it but ran out of the stuff!  Working great so far.  What an awesome piece of kit  8)

I'll get one of them some day;must save lot's of time.I've been using low heat and soaking it plus a toothbrush.. takes time.
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #446 on: November 07, 2016, 06:40:11 AM »
I'll get one of them some day;must save lot's of time.I've been using low heat and soaking it plus a toothbrush.. takes time.

It sure does!  And since we're in an enclosed space makes it much better than breathing in those hideous hideous toxins...

Making sure to clean at least one or two parts a day, here is the current progress.



We've also picked up a CL350 to help fix for a friend.  Pretty clean bike!  Just need to soak anything which had gas touching it in the ultrasonic cleaner (carbs, petcocks, etc) - should do good!  The CA160 will get some cleaning too :) leaky carb needs a clean and rebuild.  All hail the ultrasonic cleaner!








Offline grcamna2

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Re: 1973 CB350F "Modest Original" build
« Reply #447 on: November 07, 2016, 06:55:18 AM »
Good looking  8) Vintage Honda's Atlas !  :)
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline iiAtlas

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Re: 1973 CB350F "Modest Original" build
« Reply #448 on: November 07, 2016, 06:58:27 AM »
Good looking  8) Vintage Honda's Atlas !  :)

Thanks grcamna!! They are sweet ..  :D


Offline grcamna2

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Re: 1973 CB350F "Modest Original" build
« Reply #449 on: November 07, 2016, 08:31:45 AM »
Good looking  8) Vintage Honda's Atlas !  :)

The 'Word'-is-out now to folks around there that you're restoring bikes  :) and you'll be able to go into business for yourself,part time..  :D
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.