ok i was on boston craigslist and i see this under like "250ex with 400 kit"

"own 2 of these machines, they are identical, bought new on the same day. Yellow, 2 wheel drive, quick and powerful. has reverse, 5 speed, no clutch. in good condition,tires are fine, no damage. each machine has less than 50 hrs on them. Just don't ride anymore.I installed 400 kits in the the day we bought them."

I installed 400 kits the day we bought them. he acts like its a piston swap or something. im pretty sure they dont even make a 400 kit for the 250ex. correct me if im wrong cause im getting a pretty good laugh.