CB 750 Custom

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Subject Author Date
CB 750 Custom lwatters38@gmail.com 08-13-2008
  `--> Re: CB 750 Custom lwatters38@gmai...08-14-2008
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Posted by lwatters38@gmail.com on August 13, 2008, 8:31 pm


I have a 1981 CB750 Custom and the charging system I know is going bad
could it also cause a high rpm miss?
I've checked the plugs and they are in excellent shape I'm leaning
toward the carbs need work,I'm interested in what others may
think......

Posted by TOG@Toil on August 14, 2008, 3:59 am


> I have a 1981 CB750 Custom and the charging system I know is going bad
> could it also cause a high rpm miss?

Quite possibly, yes.

> I've checked the plugs and they are in excellent shape I'm leaning
> toward the carbs need work,I'm interested in what others may
> think......

Sort the charging system first. One way to check is to lob a brand new
fully charged battery in. It should run fine at high rpm for a while,
until it starts to discharge. If it misfires straightaway with a brand
new battery, then the problem lies elsewhere.

It's unlikely to be the carbs unless the bike has been laid up for
some time and the fuel has evaporated in the carbs themselves. My next
port of call would be the plug caps, and then, yes, the carbs.

Posted by lwatters38@gmail.com on August 14, 2008, 4:20 pm


>
> > I have a 1981 CB750 Custom and the charging system I know is going bad
> > could it also cause a high rpm miss?
>
> Quite possibly, yes.
>
> > I've checked the plugs and they are in excellent shape I'm leaning
> > toward the carbs need work,I'm interested in what others may
> > think......
>
> Sort the charging system first. One way to check is to lob a brand new
> fully charged battery in. It should run fine at high rpm for a while,
> until it starts to discharge. If it misfires straightaway with a brand
> new battery, then the problem lies elsewhere.
>
> It's unlikely to be the carbs unless the bike has been laid up for
> some time and the fuel has evaporated in the carbs themselves. My next
> port of call would be the plug caps, and then, yes, the carbs.

I went ahead and purchased a new rotor, reg-rec,brushes and stator do
you know how hard it will be to get the rotor off i did purchase the
special tool to remove....

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