Hey, there. I actually ride an YZ426 and WR450 but my gf just bought a TTR250 so now I'm here. Hoping to pick the brain of some folks about some issues with her TTR but that's a discussion for another thread.
What I like about the TTR compared to the YZ is that I'm NOT wrenching on it, and I'm not limping on Monday morning .
But when you do need to wrench on it, this site is your guide, Brian and contributors have put together a great bunch of detailed wrenching guides, I look here first anymore, the manual usually comes up short.