I purchased the rectifier/regulator combo from you, for my 900 LTD. I connected the green plug to the green plug that the old regulator was connected to. Sealed off the white plug the rectifier was hooked to. My old regulator had a black wire that was connected to a black/yellow wire in the bike harness. The instructions did not say what to do with the black/yellow wire in the harness, so I left it unhooked. I suspect that the black wire that is on the new combo, that was to be connected to the engine ground, bypasses the black/yellow wire and makes a new solid ground. The individual white wire on the new combo, was connected to the white wire that goes to the battery hot wire and splits off to the fuse block with a white/red wire. Please let me know if any of this is incorrect. My concern is that when I measure across the battery with bike idling, it shows 11 volts, when I rev it up, it never goes over 12 volts. Is this normal? I noticed that part of the description of the combo is that it solves the over charging of the battery. Does this mean that it will never read more than the 12 volts on the multi-meter? My reason for purchasing the combo was not overcharging, but because my battery would get weaker the longer I would ride it. I haven't had time to ride it since installing the combo unit, but feel like it should measure more than 12 volts. Any comments would be appreciated. Thank you for the answers Thank you for all of your courteous help.  You were right on. Problem at first was that my battery did not have a full charge. I have since ridden it and am now getting good readings on the battery, plus battery is staying up. Headlight is much brighter also. Seems to even run better. Just wanted you to know that you have another happy customer.

It sounds like you have it connected properly, the black/yellow wire goes to ground. I would verify your test meter first. Use the battery in your car / truck to get a reading across the battery terminals. You should see around 12.5-12.8v DC with a good fully charged battery. That's the same reading you should see if your bike battery is fully charged. If the test meter is reading correctly, then it sounds like your charging system is still under the weather. With a fully charged battery, get the bike running and unplug the blue connector block. You need to check the voltage across the pairs of wires from the stator. There are three wires (either 3 yellow or yellow, ping and light blue). Check 1 to 2, 2 to 3, and 3 to 1. You should be getting around 50v AC - if this is under 45v AC (note: alternating current), but the readings are consistent across all three pairs, then the chances are your magnets in the rotor have lost some strength. If the readings vary significantly between the pairs, the stator is probably bad. I run the same reg/rec on my turbo Z1 - it's been on there three years now. I never seem to get very high readings (around 13v max), but my battery never runs down. I think the newer technology senses the charge needed and restricts the output to be just enough to keep the battery topped up.