Hi According to manual my 2002 YZ426F should have CDI unit : 5SF-85540-00-00. I need a replacement one, so I've looked on ebay, and I've found one from an 1998 YZ400F, for which the manual says code is : 5GR-85540-00-00 (5BE-85540-00-00). Should I buy it? Can I use this one on my 426? Connectors are the same. What units from other model/year can I use? Or maybe box from Yamaha ATV?