I was thinking that the ignition should not show signs of low battery. Like its brother the CRF450 that has no battery so the ignition source is the stator which is AC voltage. The charge coil windings were added to the stator on these quads and converted to DC through the voltage regulator. The DC circuit runs the starter and lights.
Nothing wrong with checking the charging system though

Bombrider -

The Yuasa YTX numbered batteries need filling

The new YTZ numbered batteries are totally sealed

The charger mentioned above will work for both battery types.

----- Gregg -----

 

<div class="FTQUOTE"><begin quote>Originally posted by: Gimpster

I was thinking that the ignition should not show signs of low battery. Like its brother the CRF450 that has no battery so the ignition source is the stator which is AC voltage. The charge coil windings were added to the stator on these quads and converted to DC through the voltage regulator. The DC circuit runs the starter and lights.

Nothing wrong with checking the charging system though

Bombrider -

The Yuasa YTX numbered batteries need filling

The new YTZ numbered batteries are totally sealed

The charger mentioned above will work for both battery types.

----- Gregg -----</end quote></div>

I see what you are saying about the similarities and differences between these two beasts.
Yep the Stator is larger and so is the magnetic rotor to supply the batter current.
And yes they both put out an AC current
One thing we should remember about all electronic ignition systems are biased by a DC source.
It is a fact that semi conductors in regulators amplifiers or buffers circuits all are biased by a DC Source.
So the CRF has in its modules a rectifier bridge that converts the AC to DC.
Other wise the ignition system would operate erratically on the positive part of the AC wave form. Sometime ruining the semi-conductors in the ignition system.
I can not argue the point you made on the ignition system with the battery vs. the one without the battery being similar.
So if he drove the machine with all non essential electrical turned off what would discharge the battery?

 

Loose battery cables.

When a big demand for voltage is needed, like hitting the starter button, it will arc and connect for the voltage to start the bike. Not enough contact though to connect for charging the battery. Coutinually starting the unit without it charging the battery is what caused the battery to go dead.
He could have pull started the unit and the engine would have ran.

Sometines the AC signal supply line will branch off to the ignition before the regulator, and the other end that goes into the regulator can become disrupted inside the regulator. Like if that AC line were to become shorted to ground inside the regulator, since the line branched out to power up the ignition circuit, it will mess with the firing of the engine.

Just have not seen this problem in the 450r's electrical system yet. The old TRX300 had this type of issue.

----- Gregg -----

 

kyledc18 just take your battery to any Auto Zone,Advance or O'reilly auto parts store , they will check out the battery for you ; and it won't cost you a penny to find out if the battery is bad ! The last time i had to replace the batteries on my old 86' Honda 350 foreman and 93' Suzuki LTF 300 KQ 4wd i bought the batteries from Auto Zone in 2004 ; and they are still good as new today ! And they cost less than 1/4 the cost as the OEM batteries that came in the quad's when new ! Once you get a new battery make sure you're getting a good connection at both the positive and negative cable's , and also trace the positive and gound cable's to make sure you're getting a good gound ; and get a battery charger that's made for motorcycles/atvs and lawn tractors with 1 amp trickle charge ! You can get a good one for less than $30 buck's and they have an automatic shut off to keep them from over charging the battery ! williebee