Hey guys, first time Yamaha owner here. Just picked up a basket case 2009 YZ450F that needs engine work. Long story short I want to hone out some light scoring in the oem cylinder it came with, but I'm not sure if these bikes come with Nykasil-plated cylinders or not. Anyone know if they are? If so, how should I go about honing out the light scoring? Also, I am in need of a place that can install new valve seats in my head. Any favorites that you guys have? I've never sent any heads off so I'm not familiar with who does good work and who doesn't. Thanks!