I am with Allen first....change the starter moter with a new generation starter 
motor...that fits like 750 ,900,1000 so on.....One guy I now who helped me 
getting my bike....he go a 650 & 200.......200 had the same prob as it was a 
old bike...an old school mechanic ..changed his original with a Chinese cheap 
one...he told me last 3 days back...last three years no prob....for his 650 he 
is looking for brand new Chinese  that fits....and it will be cheap for 
him...he is a owner of a ledge workshop......let me know  ....if get any other 
solutions......I will keep on up dating any farther 
solution.....thanks.......Mustapha

-----Original Message-----
From: "Rick, Scituate, MA, 82 650 NH" <[email protected]>
Sent: ‎7/‎2/‎2014 8:25 PM
To: "[email protected]" <[email protected]>
Subject: Re: [Nighthawk Lovers] CB700SC hard to start

Mustapha, I'm with you on this.  Mine is an 82 650 Nighthawk.  If I'm using the 
bike as a commuter, it starts immediately first thing every morning and coming 
home in the evening.  I'm OK if I stop for gas right away but if I drive for 
over 30 minutes and then stop, I can almost guarantee a problem starting.  

Everything lights up when I turn the key to the run position but it dims like a 
dead battery and will not turn over when I hit the starter.  No power.  If I 
wait 30' to an hour it usually will start, but barely, like the battery has 
just enough power to start.  If I can wait overnight, I can guarantee it will 
start immediately.

Last night on my ride home I had to stop at Sears, coming out no chance.  The 
parking lot has a good slope but it took 3 tries walking the bike up and then 
popping the clutch in 2nd riding the slope to get it to start.  Once started it 
was fine the rest of the way home.  When I got home I turned it off, gave it a 
couple minutes and tried starting it. It was dead.  This morning it started as 
well as it did back 32 years ago.

The battery is 2 years old and I have a new one I will put in over the weekend 
but I know the new battery is masking whatever my problem is.

I would dearly love an explanation as to what is happening.

Thanks to all and have a great holiday.

Rick

On Sunday, June 29, 2014 8:29:35 PM UTC-4, Mustapha Ahmed Iqbal wrote:
Guies...this is a big issue now....when the engine hot....lights go dim....self 
 starter slows down....after half an hower 45 mints cool down....it starts 
again....when the bike was new it didn't  happen.....some where any were leak.
..Any body with any idea  or fixing experience....help...Thanks
Mustapha



From: Javier Garcia
Sent: ‎6/‎29/‎2014 10:36 PM
To: nighthawk_lovers
Subject: Re: [Nighthawk Lovers] CB700SC hard to start


If the engine turns slows when trying to start hot you might need to 
clean/rebuild your starter engine.



On Sun, Jun 29, 2014 at 12:13 PM, Jeremy <[email protected]> wrote:

Mine sounds like it's doing the same thing, hard to start hot.  I really 
leaning towards the starter drawing too much currant when it's heat soaked.  
Reason being the dash lights dim (almost flash as the starter pulls threw each 
compression) and it has that hit to it.
Sent from my iPhone


> On Jun 29, 2014, at 9:32 AM, Tommy Hill <[email protected]> wrote:
>
> Hey Allen or others,
>
>      Wanna ask you a question.  My 700S starts fine cold, but when hot, can 
> be a real bear to start.  About half the time, it starts right away and 
> purrs.  Last night, I got stuck and it took over 45 minutes of cranking and 
> letting it rest.  I was in Miami, and it backfired like a gun!  (You can 
> imagine the reactions!). While turning over, it sometimes sounds like it is 
> firing but almost more like a detonation.  Not the mis-timed damaging type, 
> but one "hit" but no joy.  Then, one of the times I try it, (ok, obviously 
> the last time) it goes like there was never a problem.  Fires and purrs.
>
>     I have new plugs, clean filter, good gas.  I have run three bottles of 
> Seafoam through.  I was thinking might be a little rich, but not so much now. 
>  Vapor lock, as I understand, is not a carb, side draft issue.  Possibly the 
> choke plungers aren't going fully in when choke is turned off.  Other guess 
> would be dirty carbs.  I plan to spray the intake boots with carb cleaner 
> today and check them.  What do you think?  Would high float level(s) cause 
> this?  Could the coils and or wires be heat sensitive?  (Due to age). Other 
> thoughts?  Bear in mind I have very few tools with me since I live in SC and 
> bike is in Miami, where I work.
>
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