I'm rebuilding a very neglected 2007 YZ 250. It's almost done after ~3,500 put into it. It's really looking nice, but I needed a new wiring harness.
I have part number 1P8-82509-20-00, which is for a 2011 to 2015 YZ 250. The PN that is called out for the 2007 is 1P8-82509-10-00. The additional lead is to the neutral switch assembly. That is the only difference that I can see visually. This is shown below in the picture attached.
Will the -20-00 work in place of the -10-00 wiring harness? Does this additional lead need to be left open or shorted to ground? Currently, I have it installed (since I already have it). I get spark, but the bike does not start or give any indication of starting. Just to rule it out, I also took apart the carb and it is all setup properly and providing the bike fuel.