Electrical issue / Rotor-stator /opinions needed???

[Scooter33]

I have been having some electrical issues for awhile so here is what I found so far. All opinions are welcome. My battery is a 1 year old Brallie. checked voltage it was at 12.65 vdc before I started the following checks. When I hit the starter button voltage dropped to 6.1. It jumped back up to 12.49 at idle. With the motor at operating temp the battery voltage never went above 13.2 vdc. I checked the stator for continuity and that was good due to getting the tone on the multi-meter. I checked the A/C voltage at the stator plug at idle & 1000 RPM was 15 / 16 VAC. The resistance reading at the stator was 1.3 to 1.4ohms, if i was using the meter right.. I am thinking the rotor and stator are weak and need to be replaced. Any thoughts?:bang:

 

[KaptinAmerika]

Do Starter Current Draw Test
Using an induction ammeter, attach the
ammeter to the positive side of the battery.
With the ignition ON, press the start switch.
Take a reading off the ammeter. There
should be an initial surge when first turning
over the engine. Typical starter current draw
should be between 160 and 180 Amperes. If
the starter draw exceeds 200 Amperes,
remove the starter for further testing.

What did you get when you ran the rpms up to 2000?
You should get roughly 16-20 volts per 1000 rpm.

 

[Scooter33]

Kaptain, The A/C volts go up to 40 @ 2000 rpm. the volts continue to go up with the rpms.
Unfortunately I don't have a induction ammeter. When I hit the starter button it clicks then a long pause then it will turnover & start. This is the second starter, both did the exact same thing. the other issue is at 4500 rpm under hard acceleration it breaks up like it hits the rev-limiter. I think that might be due to either a bad ignition or low voltage.

 

[Jwooky]

are the compression releases working?

 

[KaptinAmerika]

Sounds like your charging system is working fine.
You can pick up an induction ammeter for $10 at harbor freight.

 

[Scooter33]

Cool I will grab one tomorrow. I was txting friends to see if any one had 1.
I think the compression releasers are working that is the click, I think.

 

[Jwooky]

Put your finger on it then hit the start button. You should be able to fell them engage

 

[Scooter33]

I just tried it they both work.

 

[Sven]

1. What is the amp rating of the battery? I want max crank rating from a battery that fits in that slot. I have a high compression engine that needs to release that push vs. starter so I want to push that crank hard to resist that kinetic move.

2. At idle, my volts should be feeding more DC back into the battery so 14v+ should be the number across my battery posts I let the bike idle. I would assume we are here at the next loop of the charging system and if the volt/reg is dancing with numbers as you rev the engine, I'll assume we have a working v/reg, a questionable cca number on the battery...

3... Here we are at the final loop of the charging system and what is a good known alt number @ said rpm? So, where are we at? What is the cross reference number of your output vs. book spec?

4. I would tie my ohm meter wires up at the battery, tape the box to the handlebars and watch the numbers as I hammer the throttle up to the plugs sending out no joy. I see 14v + or high 13's as the v/reg is monitoring that number or it's at 12v, Huston we have a problem. So 12 is junk at no joy, 13-14 is joy at the bars, change the plugs, it's getting the proper voltage. Plugs are junk, charging is fine, battery is too low a cca or poor battery prep for a 1 year old battery, that is, if one kept up on the charge on the down time.

Where are we at?

 

[Scooter33]

I charged the battery and it was at 13.1 vdc. The battery is a braille 2015 PCA 1067 the full charge voltage is 13.2. I bought a induction ammeter and tested the positive cable it was at 180 A. When I was checking the + cable I NOTICED it moved. tightened it and did all the checks over. This time VDC = 12.7 key on, 12.5/hit the run button, 10.5/hit the starter, 13.8 was the highest reading when reving 2000 rpm and over. It just hit me I didn't log the voltage at idle, crap. the plugs are a dark brown color. I am thinking the voltage reg may not be sending enough dc voltage to the battery. Thoughts!