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Author Topic: 76 CB360, Cherry Bomb at Barber's  (Read 162916 times)

Offline trek97

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Re: 76 CB360, the Pig
« Reply #1110 on: Jun 09, 2016, 19:41:06 »
Adventurco and his 3d printer rock!

From this...last week.



To this...arrived yesterday.   8)


Offline Foolishdreamer

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Re: 76 CB360, the Pig
« Reply #1111 on: Jun 10, 2016, 00:04:24 »
Wow! Good luck man


Sent from my iPhone using Tapatalk

Offline trek97

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Re: 76 CB360, the Pig
« Reply #1112 on: Jun 11, 2016, 15:48:10 »
Wow! Good luck man


Thanks dude!  the Pig can use all the luck she can get.

Offline KoŽstom

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Re: 76 CB360, the Pig
« Reply #1113 on: Oct 10, 2016, 00:24:15 »
Started using a new parametric CAD program...This was a good test for the printer tolerances/modeling program scale. They all came off the print bed within 0.1-0.2mm accuracy. With a ruler the heights are dead on. Get em in the mail tomorrow.  8)

Nice!
Los Gatos, CA
1978 Honda Twinstar cm185cc: The Black Pearl project

1982 Honda GL500 Silverwing Project

Motion Photos On Facebook



'86 Honda VT700, just bought on April 29 '17
Honda z50 (sold)
Honda CB125... the original... long gone :(
Honda cb360 (sold)
Honda cb400f (sold)
Honda cb450 (sold)
Honda cb500t (sold)
Honda cb550 (sold)
'75 Honda cb750 (sold)
'78 Honda cb750 (sold)

Offline trek97

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Re: 76 CB360, the Pig, Building stock 745B's top to bottom
« Reply #1114 on: Sep 16, 2017, 08:45:33 »
Photobucket has really botched this thread up for me.  But, whatever.

Starting to build a fresh pair of stock 745B's for Barber Vintage fest in B-ham.  Why, Because I have a sickness.
This thread should be helpful for any noobs just looking for info on carb prep. 
This info is good for 754A carbs also.  The only diff being non-removable air correctors.

It starts w an NOS pair of filters I bought off ebay years ago when I first got my bike.  I think I paid $25 for the pair.  Times have changed.

If youre wanting to run pods, you will need to contact crazyPJ.



For a proper cleaning they need disassembled.  If you find jets and parts are hard to remove soak em down w penetrant and use heat gun to warm bodies. Tight jets usually come free pretty easily.  I will try to reuse as much stock brass as possible.



Before cleaning w chemicals.  I am just checking parts for fitment. 
I use a big flat file to LIGHTLY run over tops and bowls to ensure they are flat (looking for any warping that could affect O-ring sealing)





PO tried sealing bowls w blue RTV.  It wont work.  Blue RTV is not fuel resistant and will make a mess out of things.
Clean that shit out carefully.  Dont scratch the O-ring surface.  Heat gun helps w hardened bowl gaskets.





Blue silicone turns into crusty powdery shit CLOG and its hard to clean.  I will get as much as possible w dremel.



Make sure to clean/polish float seat o-ring sealing surface as good as possible and double check it for burrs.



Before dipping the bodies I fill a bottle w chem and squirt it into all the ports as best I can to avoid trapped air bubbles (not getting cleaner)



Especially the pilot/idle circuits.





Once dropped into dip can, I will flip em around and shake them a few times to work out any trapped air.

I learned to use a felt dremel bit and dab of toothpaste to polish float needle seat surface.






« Last Edit: Sep 16, 2017, 17:57:38 by trek97 »

Offline trek97

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Re: 76 CB360, the Pig, Building stock 745B's top to bottom
« Reply #1115 on: Sep 16, 2017, 17:37:28 »
After removing from dip, rinse well w water.  Make absolutely certain water sprays from ALL 3 pilot holes and the larger single idle feed, by spraying hose into the Air/Fuel adj needle hole.  These two circuits are combined internally and can be difficult to clear debris trapped inside.
Watch for good flow through air corrector holes (under diaphragm in carb tops) the feed to the jetting holes.
And from fuel inlet through the float seat hole.

« Last Edit: Sep 16, 2017, 17:57:59 by trek97 »

Offline trek97

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Re: 76 CB360, the Pig, Building stock 745B's top to bottom
« Reply #1116 on: Sep 16, 2017, 17:55:02 »
Inspect the overflow tubes in bowls for hairline cracks.  this was on my wifes 78 CB400a

« Last Edit: Sep 16, 2017, 17:58:19 by trek97 »

Offline advCo

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Re: 76 CB360, the Pig
« Reply #1117 on: Sep 16, 2017, 22:18:35 »
Back at it I see. Neat little trick for the needle and seat, I need to try that on the XL...right now if i dont have a screwdriver handy i get fuel all over the floor of the shop.

What's the reason for the new set of carbs?
"He broke the mirrors off his Cadillac, 'cause he doesn't like it looking like he looks back."

74 CB360 - Luna - http://www.dotheton.com/forum/index.php?topic=63294.0
82 GS550L - Tracker-ish - http://www.dotheton.com/forum/index.php?topic=67229.0 - Sold
74 XL350 - The Turd - http://www.dotheton.com/forum/index.php?topic=70252.0
Suzuki FA50 "No-Ped" - http://www.dotheton.com/forum/index.php?topic=71189.0
73 Suzuki RV125 -http://www.dotheton.com/forum/index.php?topic=73875.0

Offline trek97

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Re: 76 CB360, the Pig
« Reply #1118 on: Sep 17, 2017, 09:09:06 »

What's the reason for the new set of carbs?

good question, I have asked that myself.  W the current set up, modified carbs and K&Ns, She runs super, plenty of power and getting 60-70mpg.

I have swapped in the stock boxes w these modified carbs.  And there seems to be a small loss of power above 5k rpm. 
Able to build rpm faster w the K&Ns.

Simple curiosity really (coupled w the fact I cant keep my hands off it.)

As w a lot of the "cool kids" back in the day.  After getting it running (not well, but running none the less)  I immediately threw pods at her.
So, I really have no idea how well a 360 can run w the stock set up.
I just want to find out.  If its better, worse or same.  I imagine it will be about the same.

Offline trek97

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Re: 76 CB360, the Pig
« Reply #1119 on: Sep 17, 2017, 09:13:46 »
Back at it I see. Neat little trick for the needle and seat, I need to try that on the XL...right now if i dont have a screwdriver handy i get fuel all over the floor of the shop.


I had to modify the felt polishing tip small enough to fit inside the needle seat.

I chucked up the larger felt tip in dremel got it spinning up to speed, turned on the bench grinder and gently ground the felt tip down to a good fit.