Master of the Electron
Who at Yamaha verfied this? If it was a tech at your local dealer, as usual, he is wrong. They usually have little understanding of the electrics.Hi I've heard that the difference is between 01, 02-03, and 04-05 is the cdi is different on these. I have a 2001 660 and when 2nd blew out I replaced with a 2004 engine with no troubles.Everything fit perfectly. When I changed the wiring to a 03, I had to get a cdi from my 02-03 because like the diagram it didn't match. I'm think I checked but I don't think the cdi from a 02-03 will fit on a 04-05 wiring harness. The wiring might be similar but the plug is different. Yeah yamaha even verified this but I"ll double check and let you know for sure. Dave9640
Please double check and let us know what you find out, and how reputable (from an electrics standpoint) the source is.