Hello, I only have 4 wires coming out of the magneto and when I took the cover off there appears to be no flywheel? There is a large weight in the center. I am trying to reference the service manual but it shows a flywheel and 5 wires coming out. I am thinking about converting to a system like this , but I am confused about what current setup I have and what will work with it. 

Also to make matters worse I'm not sure exactly which bike this engine came out of. It is stamped 351cc. 

Thanks for any insights!

 

What is the engine number, the engine in the photo has a internal flywheel which was used on the MX360, the DT360 had a external flywheel. 

yamaha-enduros.com/index.php/360-400-cc-vin-numbers

Hi Mark, thanks for the info. 

The engine has 365-003343 stamped near where the wires come out of the magneto, but I don't see that on the vin list.  

I looked at the 73 MX360 service manual and it looks like the same engine! Thanks for the help

MX360 cylinder has eight fins, the DT360A has nine. Unless it's been mixed and matched I imagine it's all MX360 though.