Another recommendation for the DIY rectifier and regulator. I think probably the #1 most asked about questions on the forum are about combination reg/recs. I know what that tells me.
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Mashermoto's Big Charging System Adventure
- Thread starter Mashermoto
- Start date
Tells us the $100+ reg/rec from China are junk, eh?
Mashermoto
XS650 Member
I’m fairly sure I got the correct reg/rec. I’m using the one for point ignitions that has one connector for the stator and one for the brushes. So I believe we can eliminate that issue.
Jim, good explanation about the voltage switching. I actually have most of the components to build a regulator and rectifier. I have the Windy Nation rectifier but not the heat sink. I also built a regulator using a TRANSPO-CN M5-701 27225-12v regulator. I never got the regulator to work, but that was before I replaced my bad alternator rotor. After you sent me a rebuilt rotor my charging system worked using eletrosport reg/rec. now that I have a working rotor I could connect the automotive regulator and see if there is any change.
However, if the electrosport regulator is maintaining battery voltage at 12.5v while running, do I really have a problem? In other words, if I’m not dropping battery voltage while driving around, isn’t the charging system working okay?
Jim, good explanation about the voltage switching. I actually have most of the components to build a regulator and rectifier. I have the Windy Nation rectifier but not the heat sink. I also built a regulator using a TRANSPO-CN M5-701 27225-12v regulator. I never got the regulator to work, but that was before I replaced my bad alternator rotor. After you sent me a rebuilt rotor my charging system worked using eletrosport reg/rec. now that I have a working rotor I could connect the automotive regulator and see if there is any change.
However, if the electrosport regulator is maintaining battery voltage at 12.5v while running, do I really have a problem? In other words, if I’m not dropping battery voltage while driving around, isn’t the charging system working okay?
Attachments
No, a fully charged battery will read 12.6-12.7V So at 12.5V you are slowly discharging.
Mashermoto
XS650 Member
Well it appears my voltmeter on my handlebars is punking me. Here is the test just now performed. In addition to the handle bar voltmeter I also connected my shop voltmeter and tested the electrosport regulator along with the automotive regulator. Based on the shop voltmeter both regulators are working. With the engine running at 3000 rpm the electrosport reg slowly builds to 13.25v and the automotive reg slowly builds to 13.5v. However, my handle bar voltmeter never registered above 12v. Conclusion: need to replace my cheap Chinese handle bar voltmeter with another cheap Chinese one 
Oddly enough, my Chinese voltmeter does the same from time to time, but I also have a USB port installed that also reads volts. It holds steady, so hakuna matata.
I may try these .......
https://www.temu.com/led-digital-vo...&refer_page_id=10032_1784153863470_5gipzrjnqo
With a built-in on-off switch, I can wire it directly to the battery.
https://www.temu.com/led-digital-vo...&refer_page_id=10032_1784153863470_5gipzrjnqo
With a built-in on-off switch, I can wire it directly to the battery.
Mashermoto
XS650 Member
That on off switch is handy. I had to wire up a relay cube to get mine wired to the battery. Problem is finding a convenient place to mount them.
I've got that one in my truck, van and run stand. They're good meters.
Don't get the blue, they're damn near impossible to read in real life. I put one in the van, then tore the dash apart a week later to switch to green.
