Thanks for the feedback. Good eye Kiwi Roy, it is an aftermarket one. Not sure which. I picked up the bike as is - I feel like Inspector Clouseau trying to untangle the history of the electrical system...
UPDATE:
Confirmed the battery is grounded as well as the Voltage Reg.
I've also replaced the front signal bulbs with LED versions (now my entire brake/turn light system is LED). When I picked up the bike only the rear as LED and the front was original. Mixing LED and incandescent is problematic - likely from varied power draw but I'm not really an electrical expert.
I've noticed something interesting about the turn signals and there may be a connection to my battery indicator. I got the following behaviour:
- Motor Off, Power On: Turn signals flash and appropriate frequency
- Motor Idle, Power On: Turn signal flash frequency seem slightly increased and pattern slightly erratic
- 3000 RPM: Turn signal frequency is very high - they almost appear to be ON rather than flashing
NOTE: The headlight stays perfectly lit during all this.
Can anyone point me in the right direction in diagnosing this?
Is this signs of a faulty voltage regulator?
Could it be a relay or bad 12V resistor (there's one installed under the seat - I assume its for the rear LED lights)?
-Max