I'm not sure if a 400ex stator will fit in a 250x? Maybe someone else could answer that one. I only installed 400ex headlights, and they work great. As for the 400ex rear yellow fender, I found that fender in new condition for $40, and could'nt pass up. The fender does the job for a budget rebuildable quad purchased for $300, and put in $200-300 worth of work and used parts to bring this quad back to life. It's mine,paid for,and if I wreck it, go get another quad that someone is selling for cheap which has no idea how to fix it. This quad has BALLS,will stand up when you gun it,and jumps pretty well too.Currently looking at a 2001 400ex w/blown motor-If motor is to hard to fix, who knows-part it out.I encourage people to do their own repairs as long as they can safely do the work. You get a strong sense of accomplishment and feeling of joy when you can say I DID ALL THE WORK ON IT.......Yea maybe SANFORD AND SON style, but it rips.