Think I need a new battery

[FinalImpact]

FWIW: All of the battery data I've been gathering for the this thread { http://www.600riders.com/forum/fz6-...mpact-trouble-shooting-maintenance-guide.html }is done so w/out lifting the tank. You can access battery voltage right at the RR with some long probes. It can be done with the seat on, but is much easier with the seat off.

To my surprise this is cold start idle output @1500 RPM w/14.4Vdc from the charging system. Also the bike was sitting for the better part of 28 days since last rip and the voltage was 12.91vdc.

So, even below 2500 RPM this one appears to be doing its part to keep the battery charged. As for the 14.4v, that's the highest I've ever seen it and I'm not sure if thats a product of component temperature or demand. Its no load output is spec'd as 14.1 - 14.9Vdc. Granted she cranks up in about 3 seconds so its not a huge drain on the battery but this old battery is no spring chicken and the cranking voltage was down at 9.1v!

I just thought I'd share - maybe this will help someone!

 

[FinalImpact]

Can someone with a NEW battery gather some data for me??? Hey, I'll take any age battery! A couple of each would be great! Tks

Battery voltage when:
- After sitting for > 30min
- With key to ON position (not cranking) voltage when Tach settles
- When cranking engine to start
- Cold start charge voltage
- >2500 RPM
- Anything else you care to document
-->> Like AC volts between any two white wires from the stator! See pic in post above!

Thanks! PS - it for the forum!

 

[oaks]

About 2 hours after a 20 mile ride with a 10 month old Yuasa YT12B-BS on a 60F degree day.

Battery voltage when:
- After sitting for > 30min: 12.94 V
- With key to ON position (not cranking) voltage when Tach settles: 12.60 and falling
- When cranking engine to start: 10.98 was lowest observed
- Cold start charge voltage: 13.40 at ~1200 RPM idle
- @3000 RPM: 13.90
- Engine off again: 13.04

Only electrical mod is Motogiro's dual headlight relay.

 

[FinalImpact]

About 2 hours after a 20 mile ride on a 10 month old Yuasa YT12B-BS:

Battery voltage when:
- After sitting for > 30min: 12.94 V
- With key to ON position (not cranking) voltage when Tach settles: 12.60 and falling
- When cranking engine to start: 10.98 was lowest observed
- Cold start charge voltage: 13.70 initially then settled to 13.40 after 30 seconds at idle
- Engine off again: 13.04

Only electrical mod is Motogiro's dual headlight relay.

Excellent! Thanks!