The issue is that when the starter motor gets hot it increases the amps required for it to function. That is why it turns slowly and if bad enough will prevent the plugs from firing. Often if you just take it apart and clean the commutator, and shaft it will work properly again.
On Wed, Jul 2, 2014 at 10:54 AM, mustapha ahmed iqbal < [email protected]> wrote: > 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 > ------------------------------ > From: Rick, Scituate, MA, 82 650 NH <[email protected]> > Sent: 7/2/2014 8:25 PM > > To: [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. >>> > >>> > -- >>> > You received this message because you are subscribed to the Google >>> Groups "Nighthawk Motorcycle Lovers!" group. >>> > To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> > To post to this group, send email to [email protected]. >>> >>> > Visit this group at http://groups.google.com/group/nighthawk_lovers. >>> > For more options, visit https://groups.google.com/d/optout. >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Nighthawk Motorcycle Lovers!" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To post to this group, send email to [email protected]. >>> >>> Visit this group at http://groups.google.com/group/nighthawk_lovers. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Nighthawk Motorcycle Lovers!" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> >> Visit this group at http://groups.google.com/group/nighthawk_lovers. >> For more options, visit https://groups.google.com/d/optout. >> > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/nighthawk_lovers. > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/nighthawk_lovers. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. 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