Motorcycle Repair: Charging system problem, motorcycle batteries, amp hours


Question
"I had a 98 ZX6e, I had put a new battery in since July. Before I install the battery, I had it charged for more then 2 hours on 2.5 Amp. Yesterday, the bike just won't start after I came out from the bank. I managed to boost started and bought back to my garage and recharged the battery to full again. I also done a voltage leak test (O.K.), a alternator output test when the engine running above 2000 RPM and I got more then 13-14 volts, I also had the amp probe on the + wire on the battery, but I hardly have 2-5 amps on idle and nothing when I rev to 2500-5000 rpm I got 0 amp; a stator test (O.K.). Now the only test that I could think of doing is the regulator and rectifier test, but it require a Kawasaki Hand Testor from OEM.

Now my question is:

What is the surpose to be the amperage when the engine at 2000 or 5000 rpm?
With the results above is my charging system OK? If ok why is the battery dead?
What is the CCA for the battery if I want to load test the battery?


Answer
Hi Bobby.
 As far as the voltage test, when the bike is running, you should be getting 13-15 VDC at the battery terminals.  The amps won't really matter as far as the charging system.  Amps matter if the battery is old, then you should be concerned with the amps from the battery and the state of all of the cells.

 It looks as if the initial problem is that you charged the battery with the wrong amperage rating.  Motorcycle batteries (as far as street bikes) charge at 4Ah, not 2.5Ah.

 It looks as if all of the systems in the bike seem to be working correctly, as far as the ones you can test.  Have you checked the battery with a hygrometer?  That will be the teller if the battery is bad.  If it is bad, then the reason was because you charged it at the wrong amp/hours setting.

Good luck.
FALCON