I need some help I bought a yz400f a couple of months ago, it wasa basket case but had a Ca Plate so it was worth it. Anyway, alot of parts on the bike are WR parts, like the stator. I also recieved a box of extra parts, in it is the yz stator, and an additional CDI. I now have a new engine top to bottom, and a Carb off a yz426, and it is finally running decent after the new carb, jd jetting and disconnection of the TPS sensor. The only problem I am left with is sometimes I am running fast on a freeway or in traffic and the bike will all of a sudden cutout, like someone cut the lightswitch momentarily. I am guessing an electrical issue, but JD said I might be running a WR CDI and that might be the problem, but both CDI boxes I have look the same , how do I tell the difference between a WR box and a YZ box?