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Author Topic: Re: 76 CB360, the Pig, Building stock 745B's top to bottom  (Read 152951 times)

Offline crazypj

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Re: New Dual O2 sensors, 76 CB360, the Pig
« Reply #1110 on: Jun 04, 2016, 14:08:16 »
that is very cool, but float height is not a tuning tool it doesnt effect tune unless way out of whack


 Nope, it is a tuning tool
The float height will adjust the level of fuel in float bowl and consequently affect if motor is running rich or lean
Add some heat and vibration then even 1mm variation can have a major effect
The reason carb specs have a 'range' isn't to allow piss poor setting but to compensate for different running conditions, altitude variations, etc
'you can take my word for it or argue until you find out I'm right'
I gave my girlfriend an orgasm the other night, but, she spat it back at me
 Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH', the paint wouldn't even have time to dry
 Itís not worth doing something unless someone, somewhere, would much rather you werenít doing it  (Terry Pratchett)
CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline trek97

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Re: New Dual O2 sensors, 76 CB360, the Pig
« Reply #1111 on: Jun 04, 2016, 16:05:22 »
Nope, it is a tuning tool
The float height will adjust the level of fuel in float bowl and consequently affect if motor is running rich or lean
Add some heat and vibration then even 1mm variation can have a major effect
The reason carb specs have a 'range' isn't to allow piss poor setting but to compensate for different running conditions, altitude variations, etc

Because, otherwise floats would be more of a "fixed" part.   Meaning, "non-adjustable"  Like comparing a "fixed" size internal jet to the "adjustable" A/F mix needle.  If the A/F didnt need to be tuned for the particular environment at hand...it would be  permanently fixed jet.
So even though the intent of the manufacturer may not have been to use float level as a "performance enhancement tuning tool".  Its intent is more of a "maintenance tuning thing, (set it and occasionally check it)".  But, can be employed as such.  Why not use it, as such?
« Last Edit: Jun 04, 2016, 16:48:22 by trek97 »

Offline advCo

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Re: 76 CB360, the Pig
« Reply #1112 on: Jun 05, 2016, 14:00:03 »
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)
"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 #1113 on: Jun 05, 2016, 20:21:52 »
Nice!  once you find out the shipping rate PM your paypal.

Offline trek97

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Re: 76 CB360, the Pig
« Reply #1114 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 #1115 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 #1116 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 #1117 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
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'86 Honda VT700, just bought on April 29 '17
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Honda cb400f (sold)
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Offline trek97

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Re: 76 CB360, the Pig, Building stock 745B's top to bottom
« Reply #1118 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 #1119 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 »