Has anyone put a header from a 250F on a two stroke 250? I'm getting a bike for my 16 year old to ride in the woods and I'd like the torque of the 250, but he doesn't need all that top end. I was looking at a YZ 250 with the header off a YZ 250F in the hopes of around 30 HP and no expansion chamber to dent. Any ideas? Thanks in advance.