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#Post#: 2198--------------------------------------------------
Running without a battery?
By: patentgeek Date: October 22, 2017, 11:25 pm
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Has anyone tried running their NF without a battery, maybe
placing a large capacitor in place of the battery? I've done
this on other bikes with (permanent magnet) generator type
systems, but I'm not sure if the NF generator produces enough
juice at kick-start revolutions to start the bike.
#Post#: 2205--------------------------------------------------
Re: Running without a battery?
By: banquo Date: October 23, 2017, 6:29 am
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I've started mine with a completely flat battery, so that's
encouraging. On a parallel course, Tonya removed his dynamo and
battery, and ran a total loss system from a small Li-ion
battery, with rarely used LEDs and a reprofiled points cam to
reduce dwell. Worked OK, although he's now looking at fitting a
mini-dynamo to restore some charge. The stock dynamo and battery
are way oversized for civilian use.
#Post#: 2207--------------------------------------------------
Re: Running without a battery?
By: patentgeek Date: October 23, 2017, 5:25 pm
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[quote]I've started mine with a completely flat battery, so
that's encouraging. [/quote]
That's a pretty good indication that a capacitor can be
substituted for the battery.
The battery space on the NF is so huge, I'd like to re-purpose
it for storage.
#Post#: 2208--------------------------------------------------
Re: Running without a battery?
By: banquo Date: October 24, 2017, 3:15 am
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I'd 'planned' something similar (I do a lot of ideas and none
ever comes to fruition) but was disheartened by the space
occupied by the rear mudguard. I'd visualised a box fitting
right through from side to side, but the mudguard took up most
of the space. I did consider replacing the battery with a small
AGM type, that could be stuck pretty much anywhere. That might
be more convenient than dispensing with it altogether.
#Post#: 2632--------------------------------------------------
Re: Running without a battery?
By: patentgeek Date: June 10, 2019, 11:39 am
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Update. I tried substituting a large capacitor for my battery
and couldn't get my bike to start (running conventional points).
Your results might vary.
#Post#: 2634--------------------------------------------------
Re: Running without a battery?
By: banquo Date: June 10, 2019, 2:33 pm
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I'm no good with electronics, but if you kck the bike over with
a capacitive load connected to the dynamo output, won't all the
energy go to the capacitor until it's fully charged, so there's
nothing to generate a spark?
#Post#: 2642--------------------------------------------------
Re: Running without a battery?
By: johnedwards Date: June 23, 2019, 11:23 am
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with a dynamo you wont get any power to feed the capacitor until
you spin the dynamo fast enough for the voltage reg to pull in .
this wont happen at kickstart revs . capacitors only work on
permanent magnet alternaters that generate from zero revs. you
need a small battery to activate system
#Post#: 2661--------------------------------------------------
Re: Running without a battery?
By: banquo Date: July 24, 2019, 2:26 pm
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I'm going to have to revise my comments above after the Mighty
Falcone packed in in Italy, and the battery was the culprit.
Ridiculous; it was only 16 years old, and stuck in there 8 years
ago, when it stopped churning my Harley over. I knew something
was wrong when it didn't start first kick, and all the symptoms
were the same as when the coil failed last year, but I couldn't
believe the replacement had gone the same way so quickly. The
bike would start evengually, but was misfiring and backfiring,
and would die at low rpm (as it did as we drew in for the ferry
to Bellagio). An hour or so of messing around, changing the HT
lead for a copper one got it running again, but something
clearly wasn't right. The lights were very dim off the battery,
but bright when the engine was running, so it all pointed to the
battery. I noticed that the idiot lights were quite dim, but as
I turned the engine over, and the points closed, they virtually
went out, so the voltage was collapsing even under moderate
load. Looks like rattling out there in the back of the van has
shaken what was left of the battery to ;pieces, and I suspect an
internal fracture, as it was fine before we left. Mandello is
not the place to need a new battery in a hurry. All anyone
wanted to sell me was a huge wet battery, the OEM spec for the
bike. Nobody had any AGM batteries, which are all that I use
these days, and there wasn't time to order one in. I ended up
buying a tiny sealed lead-acid battery for (gulp) 70 Euros, but
that was better than the 120 Euros for a wet battery that I
don't want.
#Post#: 2662--------------------------------------------------
Re: Running without a battery?
By: philb Date: July 28, 2019, 9:26 am
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Hi, just catching up, and by coincidence, my battery is on its
way out. So it's interesting to read this article.
I've just replaced my Triumph Trident battery with an AGM
battery, what a difference, just look at the button and it
starts.
So.......what's recommended by the people who have tried them,
is there a Motobatt suitable?
My N/F has the dynastart facility......but it's not interested
with my old and tired lead acid type.
Thanks for any info. Phil.
#Post#: 2663--------------------------------------------------
Re: Running without a battery?
By: banquo Date: July 28, 2019, 4:44 pm
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[quote author=philb link=topic=348.msg2662#msg2662
date=1564323986]
Hi, just catching up, and by coincidence, my battery is on its
way out. So it's interesting to read this article.
I've just replaced my Triumph Trident battery with an AGM
battery, what a difference, just look at the button and it
starts.
So.......what's recommended by the people who have tried them,
is there a Motobatt suitable?
My N/F has the dynastart facility......but it's not interested
with my old and tired lead acid type.
Thanks for any info. Phil.
[/quote]
Motobatt seem to elicit differing views, but I’ve had no issues.
Mine has been running from a Harley Softail battery from 2003,
after it stopped churning over that from about 2011. It’s
physically much smaller than the stock battery and the Motobatt
equivalent cost about £80. If it turns over a Harley the
Dynastart should be a breeze
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