DukesGarage
New member
I have a Honda, 85cc, 4 speed, 4 stroke engine that came off of an old quad. I am mounting it to a drift trike and when I was doing the wiring i noticed that there was a disconnected red wire coming out of the side cover alongside a blue and black wire that ran to the CDI. Also on the CDI is a disconnected green wire. I figured that these two wires must have been connected at some point. When I removed the side cover i realized that the red wire ran to a small unit next to the Neutral indicator where it was also disconnected. Just below this unit was an identical unit that wasn't connected to anything. I assume that this is the safety switch that does not allow the engine to start when it is not in neutral and it had been bypassed by simply cutting the wire. I would like this feature to function again but I'm not sure how to wire it back up. As far as I can tell the sensors are still intact and could function if wired up properly. Any experience with this system? Any ideas on what this engine could be or its model year?


Top is the two identical units that I need to know how to connect.
Bottom is the mysterious green wire that I believe connects to the red wire in the top picture.
The pictures got turned on their sides if that makes any difference.
In my research I have found other engines that use these units but they only have one of them. I am yet to find any reference of an engine that has two sensors as this one does.
If that red wire attaches to the top sensor then what is the bottom sensor for, and where does it connect to the CDI?


Top is the two identical units that I need to know how to connect.
Bottom is the mysterious green wire that I believe connects to the red wire in the top picture.
The pictures got turned on their sides if that makes any difference.
In my research I have found other engines that use these units but they only have one of them. I am yet to find any reference of an engine that has two sensors as this one does.
If that red wire attaches to the top sensor then what is the bottom sensor for, and where does it connect to the CDI?