Originally Posted by LightSpeed
Originally Posted by planenut

The HD unit is a direct replacement for the CE original Nippymog. The only thing that needs to be changed is the ring tag on the end of the long lead that goes up to the terminal block near the battery, it needs a larger ring. The only other plug is a square 4 pin AMP type plug about 6" down the loom from the rectifier. Check it is fully connected and locked when you connect the plugs, it can be stiff to engage fully. Use cable ties on the loom to stop any chaffing. Check you have about 14.5v when the engine is running.



Let me understand this correctly, when using the HD rectifier the connector is a straight sway, just plug it in securely.

There are two other wires coming out of the rectifier. One with a red lug on the end and the other with a black lug on the end.

Is the black one to go to the negative of the battery or the nearest ground?

Where is the red, which I assume is positive, supposed to go? To the red lug in front of the lil tank? Is that the wire that disappears into the loom in that wire mess by the oil filter?


You are correct, the HD connector plugs directly into the M3W harness, the black wire goes to the same earth as used by the CE rectifier and the red wire as you say disappears into the loom and is connected to the B post, the red lug in front of the oil tank. The ring terminal on the red wire does need changing for a larger size to fit the B post.

I know some people have just cut the CE red wire near the rectifier and spliced the HD wire to it, but it is not too much effort to feed the wire through the loom, you just need to cut all the cable ties and then replace them once done.

Last edited by Rog G; 18/03/21 08:27 AM.
2021 M3W
2013 M3W - Sold
1971 4/4 2 Seater
1934 Sports