1975 XS650B with a 750cc kit. When it runs, it runs great. However the stock charging system has always been sketchy. Did some voltage readings and found that it wasn't really charging well until it was revving well over 4000rpm. I was going to try and troubleshoot the stock setup but instead decided to opt out for a solid state unit specifically for the '70-'79 with breaker points, part# 24-2089.
The wiring off the new unit consists of: 3 white stator wires, red battery, black ground, green and brown field coil. The stock setup from the wiring harness has the 3 stator wires, red and black wires on one plug that goes to the stock rectifier. The plug to the stock regulator (green, brown and black) is situated to the left rear top of the battery box. I found that the black ground wire leading to the rectifier had a short and most of the insulation was burned away. I opened the wiring harness and replaced that black wire.
I mounted the new unit underneath the battery, where the old rectifier was, fashioning a bracket that holds it off the battery box frame about an inch to ensure adequate air flow. I wired the new plug (3 white, red, black) and ran the green and brown wires up to where the green and brown wires enter the wiring harness. Long story short, I'm confident that I hooked things up correctly (I could still be wrong however).
I started the bike and took a voltage reading at the battery.....almost 18 volts at 4000rpm! That's not good. In fact it is 14-15 volts at idle.
Something just came up and I have to cut it short for now.....I'll try to get more details tomorrow. But....what the heck? How come my speedy regulator ain't regulating? Ideas? Thanx in advance
The wiring off the new unit consists of: 3 white stator wires, red battery, black ground, green and brown field coil. The stock setup from the wiring harness has the 3 stator wires, red and black wires on one plug that goes to the stock rectifier. The plug to the stock regulator (green, brown and black) is situated to the left rear top of the battery box. I found that the black ground wire leading to the rectifier had a short and most of the insulation was burned away. I opened the wiring harness and replaced that black wire.
I mounted the new unit underneath the battery, where the old rectifier was, fashioning a bracket that holds it off the battery box frame about an inch to ensure adequate air flow. I wired the new plug (3 white, red, black) and ran the green and brown wires up to where the green and brown wires enter the wiring harness. Long story short, I'm confident that I hooked things up correctly (I could still be wrong however).
I started the bike and took a voltage reading at the battery.....almost 18 volts at 4000rpm! That's not good. In fact it is 14-15 volts at idle.
Something just came up and I have to cut it short for now.....I'll try to get more details tomorrow. But....what the heck? How come my speedy regulator ain't regulating? Ideas? Thanx in advance