They're out of stock on the voltage regulator
On Aug 6, 2010, at 9:20 AM, Javier Garcia wrote:
Very interesting Gene, thanks for the info.
Javier.
On Fri, Aug 6, 2010 at 5:53 AM, Gene Henry <[email protected]> wrote:
Caution: your experience may vary!
There has been much discussion, for a long time, about the
inadequacies of the Nighthawk charging systems, and low/no charging
below 2500/3000 RPM, or sometimes higher.
I had the same problems, and encountered many failures to start. I
added an "idiot light" assembly from Harbor Freight to see what was
going on. See previous post at the end of this one. I have mine
double-stick-taped to the gas tank; maybe not "pretty" but very
reassuring! It was my theory that at a "certain" voltage level
(undetermined) the voltage level was low enough to cause a failure
in the ignition system, even though there was sufficient power to
continue to crank the engine.
I replaced the battery with a Honda (Yusa?) and the regulator/
rectifier with a model from Electrosport -information below - and
got an immediate improvement in the whole system. Currently,
the lights indicate charging of 12.5 volts starting at
between 1200 and 1500 RPM, or lower. Extended driving will bring
the system voltage up to near 14 volts. I rode about 125 miles
yesterday, and the voltage level was about 14 volts when I turned
it off. When I turned the key on this morning to check, the
battery was at 12.5 volts with the headlight on, not running.
I have just recently had the ignition system worked on, with one
coil replaced and a new CDI module, and it has started without
hesitation every time since the repair. I think the marginal
ignition system was my biggest problem, and the regulator/rectifier
was the real "frosting on the cake".
If you are having ongoing charging problems, or simply want to
improve your reliability, I highly suggest you consider the
Electrosport regulator/rectifier. It was also recommended several
times by the electrical engineer, jean-
[email protected] on our list. Check his previous posts
for much more information.
Gene Henry
Originally sent 11/2/2009
Recent experience with my 84' CB650SC:
Intermittent starting problems, sometimes after just riding and
shutting down.
Battery condition questionable.
Charging system typical low output.
I have a multi light voltage indicator from HarborFreight installed
so I can see the voltage/battery/charge condition.
Three alternator readings: Strong (14V), Normal (13.5V), Low
(13V) $4.99
Three battery readings: Good (12.5V), Fair (12V), Poor (5V)
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=46972
Replaced the battery with a new Honda/Yusa(?). Much better.
Replaced the regulator/rectifier with one from Electrosport $100
http://www.electrosport.com/products/product-detail-581.php
This made a enormous difference in charging voltage levels.
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