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Old July 16th, 2023, 12:33 PM   #7
Norway
ninjette.org member
 
Name: S n 0 r r £
Location: Stjoerdal, Norway (San Diego, CA, USA, 2015-2016 , Bielefeld, Nordrhein Westfalen,Germany 2021-'22)
Join Date: Sep 2012

Motorcycle(s): TMZ 5.952 "Tula" 200, Ninja 250 -Special ed. '11, ZZR 1400 (ZX14), Honda CB 1100 F Super Bol D'or

Posts: 148
Quote:
Originally Posted by Triple Jim View Post
It depends on how it varies with speed. If it gets a little brighter when you go from idle to a little higher RPM, that's normal. If it continues to get brighter with further increase in RPM, that might indicate a failed regulator.

Measure the battery voltage at various engine speeds to see if it stays steady around 14-ish volts, except for a little drop at idle.
Not having to remove the seat, I connected to one of the wires (probably) connected to some rear light. Before starting the engine I read about 11.5 V. After starting it, it seemed to stabilize at around 12.8 V, when increasing the RPMs well above idle. Guess the positive / + voltage should be more or less similar for any rear bulb as at the battery (?).
Just tried it..
I had expected a higher voltage, more like 13-14 V...
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