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Author Topic: Honda "l'arancio dolce" CB 750 Resto-Mod Project  (Read 6813 times)

Offline teazer

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Re: Honda "l'arancio dolce" CB 750 Resto-Mod Project
« Reply #50 on: May 22, 2019, 12:32:16 »
I would suggest checking the FUEL level.  You could do that by replacing the drain screws with adapters and set teh fuel levels on all 4 at 3mm below the gasket surface.

Offline der_nanno

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Re: Honda "l'arancio dolce" CB 750 Resto-Mod Project
« Reply #51 on: May 22, 2019, 14:17:57 »
Check the float height with one of the floats being set parallel to the gasket face ...and then set the others to the same height. This might not be the 100 percent setting, but it should be good enough to move on.
« Last Edit: May 23, 2019, 06:00:05 by der_nanno »
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Offline Maritime

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Re: Honda "l'arancio dolce" CB 750 Resto-Mod Project
« Reply #52 on: May 22, 2019, 14:27:52 »
To answer the oil question yes do exactly that. pull plugs to make it easier to turn over. pull a cover and turn over with the starter until you see oil flow in the head. Good idea to do that so you don't have the first start be dry.
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Offline teazer

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Re: Honda "l'arancio dolce" CB 750 Resto-Mod Project
« Reply #53 on: May 22, 2019, 15:24:10 »
Check the float height with one of the floats being set parallel to the gasket face. This might not be the 100 percent setting, but it should be good enough to move on.

"should be" sums that up.  That's more or less how much of us do it, but you may be surprised how far off the actual fuel levels are.  That's why it's better to set FUEL level on any older bike.

Offline TranceMachineVienna

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Re: Honda "l'arancio dolce" CB 750 Resto-Mod Project
« Reply #54 on: May 22, 2019, 15:33:27 »
I will do the fuel level for sure thanks teazer!

I call that a success!
The bike runs even for now just with a screwdriver :)
Put the carbs back on and tried it.
The bike holds no idle runs only on choke  and needs to get revved up so I guess I will need to check the small jet system in the carbs again....
The ignition gaps needs to be set too correctly.

Cylinder 2 and 3 still run the old spark plugs.
All spark plug boots are fresh.




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« Last Edit: May 22, 2019, 15:52:36 by TranceMachineVienna »

Offline pidjones

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Re: Honda "l'arancio dolce" CB 750 Resto-Mod Project
« Reply #55 on: May 22, 2019, 21:25:20 »
The 750s take quite a while to warm up enough that they don't need the choke.
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Offline der_nanno

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Re: Honda "l'arancio dolce" CB 750 Resto-Mod Project
« Reply #56 on: May 23, 2019, 06:01:51 »
"should be" sums that up.  That's more or less how much of us do it, but you may be surprised how far off the actual fuel levels are.  That's why it's better to set FUEL level on any older bike.

Yeah, I got interrupted mid sentence. I corrected it above.

From my experience it is more important to set all to the same height than the exact value. Personally I like to set floats rather high to make sure, I don't run in any starvation issues. But this is really *JUST* a personal preference.
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Offline TranceMachineVienna

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Re: Honda "l'arancio dolce" CB 750 Resto-Mod Project
« Reply #57 on: May 23, 2019, 08:28:54 »
I need to check too if the cam is lubed properly.
There is definitely coming oil to the head but I will check more next time I start the bike up again.
Still stoked that the bike ran on the 2 bad old fouled plugs...
When I know that the engine is sound (which it really feels like at the moment, no clacking or bad sounds) the bike will be fully disassembled.
Frame will be cleaned from the police brackets that were welded on and the bike will be Black with the stock Honda decals.
Long way to go but I feel motivated now!

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Offline TranceMachineVienna

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Re: Honda "l'arancio dolce" CB 750 Resto-Mod Project
« Reply #58 on: Jun 25, 2019, 10:18:27 »
So good news guys!

The CB runs on its own terms, starts on the first push of the button and I tried with a q tip and the head gets oil to the camshaft!
The only thing that bothers me is that the cam chain makes a bit of noise...So I will try to do the cam chain tensioning drill...Found this video on Youtube.
What I dont get is that the guy on the video refers to the most right cylinder as cylinder 1?maybe it is because iŽm left handed but this seems illogical...
help is appreciated!


Offline irk miller

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Re: Honda "l'arancio dolce" CB 750 Resto-Mod Project
« Reply #59 on: Jun 25, 2019, 10:43:12 »
So good news guys!

The CB runs on its own terms, starts on the first push of the button and I tried with a q tip and the head gets oil to the camshaft!
The only thing that bothers me is that the cam chain makes a bit of noise...So I will try to do the cam chain tensioning drill...Found this video on Youtube.
What I dont get is that the guy on the video refers to the most right cylinder as cylinder 1?maybe it is because iŽm left handed but this seems illogical...
help is appreciated!


Normally, we number the cylinders left to right as sitting on the bike.  The video shows he has the exhaust tappet cover open, which is all the way left as you sit, but in the video it's all the way right, since he's facing the bike on the exhaust side.  That's definitely #1.


The way the cam is set up on these, the 1/4 and 2/3 are at TDC at the same time, but intake on 1/3 and 2/4 are open at the same time and exhaust on 1/2 and 3/4 are open at the same time.  This is why Honda did 4-into-2 and 4-into-1 exhausts with 1/2 and 3/4 matched.