My bike has me questioning the charging system. I put a new Yuasa AGM battery in last year. I notice it slowly uses up its charge resulting in slow turnover when starting. I just did a 130 km ride yesterday and it was quite sluggish turning over today. I put it on the maintenance charger then after a couple of hours, tested the voltage. 12.6 volts static, then 17.8 volts with it running around 4,000 rpm. I also noticed that my headlight has just burned out on both filaments. I had a second light that I removed last year because it was very erratic with brightness all over the place. Both are Philips H6024 lights, but from new, one was steady while the other is all over the place. The steady one is now dead.
If I check my manual, I see the voltage regulator exactly as mine looks:
If I check Partzilla, it shows the voltage regulator as a very different looking part, part #28:
First, the regulator is likely the culprit here isn't it? Next, why does the Partzilla part look so different from the one on my bike and in the manual? To make matters worse, searching the Partzilla part number 21066-026 shows 2 types, the wire type like in the diagram and a very different looking beast:
If the voltage regulator is the problem, what should I replace it with and does anyone know the part number of the OEM one in my manual? I did undo the connections to mine and they looked sparkling clean.
Thanks.