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1981 Honda CB750 Custom Carburetor Removal

 
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PotentiallyAndy

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Since: Jul 25, 2005
Posts: 1



(Msg. 1) Posted: Mon Jul 25, 2005 3:31 pm
Post subject: 1981 Honda CB750 Custom Carburetor Removal
Archived from groups: alt>motorcycles (more info?)

Hi

New to this sort of thing (both groups and bikes) so please bear with
me.

I have a 1981 Honda CB750 Custom and I want to remove the carburetors
to give them a good cleaning. I have the correct Clymer Manual for my
bike, but I am having a problem.

To remove the carbs (accoring to the manual), you must first remove the
battery box bolts and move the battery box to the rear. You can then
move the air box to the rear too thereby allowing you to remove the
rubber intakes from the carbs.

When thats done, it describes how to remove the carbs.

HOWEVER: (and here is the problem) The battery box will not move to
the rear without first moving forward to clear its bracket. But it
can't do this as the air filter box is in the way.

As far as I can see, the air filter box can't be removed unless the
rubber intakes to the carbs are removed first, which you can't do
unless ....... I seem to be going in circles.

Am I missing something here?

Thanks in advance
Andy

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kriyamanna

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Since: Jul 21, 2005
Posts: 57



(Msg. 2) Posted: Mon Jul 25, 2005 3:58 pm
Post subject: For SAKE!! Holiday plans etc [Login to view extended thread Info.]
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PotentiallyAndy wrote:

> HOWEVER: (and here is the problem) The battery box will not move to
> the rear without first moving forward to clear its bracket. But it
> can't do this as the air filter box is in the way.
> As far as I can see, the air filter box can't be removed unless the
> rubber intakes to the carbs are removed first, which you can't do
> unless ....... I seem to be going in circles.

Well, I don't happen to own a CB750C, but if I was going to remove the
carbs for cleaning, I would spray all the rubber intake hoses with
aerosol carburetor cleaner to soften them up for easy removal. Put some
rags under the hoses to catch drips. The carb cleaner might soften
paint.
The hoses will be more flexible and you can probably gently pry the air
box hoses off with a screw driver. Some kinds of hoses have a groove in
the air box end, and those hoses can be shoved back into the air box.

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kriyamanna

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Since: Jul 21, 2005
Posts: 57



(Msg. 3) Posted: Mon Jul 25, 2005 9:16 pm
Post subject: For SAKE!! Holiday plans etc [Login to view extended thread Info.]
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gsl wrote:
> "kriyamanna" wrote:

> >The hoses will be more flexible and you can probably gently pry the air
> >box hoses off with a screw driver. Some kinds of hoses have a groove in
> >the air box end, and those hoses can be shoved back into the air box.
>
> wouldn't the carb cleaner eat at the rubber hoses?? try using a
> hairdryer to soften up the rubber hoses first.

If aerosol carb cleaner does anything to rubber hoses, they were
totally dried out, cracked and generally useless. Carb cleaner just
contains xylene, which is used for paint thinner and acetone which is
used for nail polish remover. It takes a long time soaking in acetone
for it to attack paint...
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gsl

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Since: Jul 25, 2005
Posts: 1



(Msg. 4) Posted: Mon Jul 25, 2005 11:55 pm
Post subject: For SAKE!! Holiday plans etc [Login to view extended thread Info.]
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On 25 Jul 2005 11:58:33 -0700, "kriyamanna"
wrote:

>
>
>PotentiallyAndy wrote:
>
>> HOWEVER: (and here is the problem) The battery box will not move to
>> the rear without first moving forward to clear its bracket. But it
>> can't do this as the air filter box is in the way.
>> As far as I can see, the air filter box can't be removed unless the
>> rubber intakes to the carbs are removed first, which you can't do
>> unless ....... I seem to be going in circles.
>
>Well, I don't happen to own a CB750C, but if I was going to remove the
>carbs for cleaning, I would spray all the rubber intake hoses with
>aerosol carburetor cleaner to soften them up for easy removal. Put some
>rags under the hoses to catch drips. The carb cleaner might soften
>paint.
>The hoses will be more flexible and you can probably gently pry the air
>box hoses off with a screw driver. Some kinds of hoses have a groove in
>the air box end, and those hoses can be shoved back into the air box.

wouldn't the carb cleaner eat at the rubber hoses?? try using a
hairdryer to soften up the rubber hoses first.
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SAMMMM

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Since: May 22, 2005
Posts: 18



(Msg. 5) Posted: Tue Jul 26, 2005 1:35 am
Post subject: For SAKE!! Holiday plans etc [Login to view extended thread Info.]
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carb cleaner may damage the rubber stuff. use silicone spray to lube it.
good luck, sammmm


"kriyamanna" wrote in message

>
>
> PotentiallyAndy wrote:
>
>> HOWEVER: (and here is the problem) The battery box will not move to
>> the rear without first moving forward to clear its bracket. But it
>> can't do this as the air filter box is in the way.
>> As far as I can see, the air filter box can't be removed unless the
>> rubber intakes to the carbs are removed first, which you can't do
>> unless ....... I seem to be going in circles.
>
> Well, I don't happen to own a CB750C, but if I was going to remove the
> carbs for cleaning, I would spray all the rubber intake hoses with
> aerosol carburetor cleaner to soften them up for easy removal. Put some
> rags under the hoses to catch drips. The carb cleaner might soften
> paint.
> The hoses will be more flexible and you can probably gently pry the air
> box hoses off with a screw driver. Some kinds of hoses have a groove in
> the air box end, and those hoses can be shoved back into the air box.
>
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Anthony W

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Since: Jul 13, 2005
Posts: 7



(Msg. 6) Posted: Tue Jul 26, 2005 3:55 am
Post subject: For SAKE!! Holiday plans etc [Login to view extended thread Info.]
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The truth is that the air box doesn't move enough to make much of a
difference. I remove the screws from the clamps holding the boots to
the airbox then bend the camps straight so they can be removed. With
the clamps out of the way the boots can flex without bending the camps
all to hell when I wedge the carbs up to pull them out. I find that it's
about 1/4 the labor on a carb clean on a 4 cylinder bikes is R&R'ing the
carbs.

I've done hundreds of set of carbs over the years and the only thing
that makes it easier to junk the airbox and install individual pods.
However some bikes can be a bitch to dial in with pods...

Tony

PotentiallyAndy wrote:
> Hi
>
> New to this sort of thing (both groups and bikes) so please bear with
> me.
>
> I have a 1981 Honda CB750 Custom and I want to remove the carburetors
> to give them a good cleaning. I have the correct Clymer Manual for my
> bike, but I am having a problem.
>
> To remove the carbs (accoring to the manual), you must first remove the
> battery box bolts and move the battery box to the rear. You can then
> move the air box to the rear too thereby allowing you to remove the
> rubber intakes from the carbs.
>
> When thats done, it describes how to remove the carbs.
>
> HOWEVER: (and here is the problem) The battery box will not move to
> the rear without first moving forward to clear its bracket. But it
> can't do this as the air filter box is in the way.
>
> As far as I can see, the air filter box can't be removed unless the
> rubber intakes to the carbs are removed first, which you can't do
> unless ....... I seem to be going in circles.
>
> Am I missing something here?
>
> Thanks in advance
> Andy
>
 >> Stay informed about: 1981 Honda CB750 Custom Carburetor Removal 
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