Possible Charging Issue

[Urbestfriend]

Had enough of the dead battery syndrome and replaced it.  Searched this Forum under this subject and also copied and instituted Section 17 of the manual "Battery/Charging System".  Here's a tip.  For around $12 -15 you can buy a portable digital "Innova Battery Monitor".  Of course,  you'll need a 12 VDC Plug-in on your dash which I've had and recommended for a long time.

What I've found is that I'm running about 12.4 - 12.8 VDC and just 13 VDC around 5,500 RPM.  When checking the same thing on my Grand Vista (Grand Dink) "Same Engine",  it easily climbs to 13+ VDC.  I pulled the inner tub out and checked all my connections and they are corrosion free and tight.

Unless you are an electrical genius,  the manual, of course, is not easily interpreted.  At any rate,  can anyone comment on this issue and I highly recommend looking into the Voltmeter.  Value is immeasurable.

[MaryK]

Normally you measure the voltage on the battery at various RPMs with a fully charged battery.
Grand Dink 250 service manual page 16-5

The charging system should create 14.5 volts maximum, if higher it could damage the electronic ignition and such.
Higher voltages indicate a bad voltage regulator.

But it sounds like your system is not charging or minimally charging at best. 
12.4 volts is about what a fully charged battery produces.

So, if all of the electrical connections are good, either the A/C voltage generator or the rectifier circuits are bad.

It is usually easy to test the rectifiers, all you need is an ohmmeter to measure the forward and reverse resistance of each
rectifier.  Very low resistance in the forward direction of current flow and very high resistance in the reverse direction.
And all of the should give the same values.

If the rectifiers check out, then you start to look at the A/C generator that feeds the rectifiers.
For that you may need to measure both resistance and A/C voltages.

The Grand Vista (Dink) 250  service manual is good on the rectifiers test.  Page 16-6
And page 16-5 shows the generator resistance test.

I am impressed with the Grand Vista (Dink) 250  service manual, but it helps to have experience doing these tests
because the information is terse.

Scoot safely,

[Urbestfriend]

Thanks Mary K.   I was hoping there was someone's experience that didn't result in a $125.00 parts spend.
I too have the Grandvista Manual and I copied the Section 16 data.  A little more examination of this
data makes it a tad clearer.  I had hoped both Grandvista and Xciting shared these same parts,  but
to no avail.  It is clearly evident that either the stator or Rectifier is the culprit.

[Urbestfriend]

Here is an update on this charging issue.  I have ordered a new Stator and Rectifier from Stadium Yamaha.  Delivery scheduled 4/29 - 5/1  (This is why I have two bikes).  Once the body panels are removed the steps in the manual are much easier to understand as some items are not only dirty, but hidden.   While I'm waiting on these parts,  I'm installing a new rear tire,  relocating my manual Kickstand cut-off bypass switch and installing another 12VDC outlet.  This includes a cleaning of the uncovered dirty parts of the engine.

Here are three points I'd like to encourage others (especially new) to do:  1) Do not rely on every dealer to know what they are doing anymore than you can yourself.  Most end up calling Kymco anyway.   2)  Second thing,  after purchase and registration of the bike... Download the appropriate manual.  There are several posts listing availability on this forum.  Cost can be free to under $10.00.   3)  Utilize the Parts Manuals listed by Stadium Yamaha,  etc. They are usually detailed and show accurate depictions of what parts look like,  how they assemble and how much they cost.  The internet is a wonderful resource and you can research anything you need to know.   This Forum is an innumerable resource and I have often posted questions and not received the answer I anticipated.    Yet I hope I've posted information beneficial comments and answers for others.  Most of the people here are in their 50's, 60's and even 70's so there's a wealth of information.  Myself.. there's no way I could afford three scooters and a BMW automobile,  if I didn't do most of the maintenance myself.  That goes for all the years I worked and now that I'm on Social Security.