I was going to do a top end overhaul and I was considering the cylinder works big bore or HC setup with a new cylinder. My question is what other parts or seals do I need to buy that don't come in the gasket kit? I was already planning on doing the cam chain at the same time. Bike has 48 hours on it and I feel I have pushed it longer than I should before doing this. I am planning on having the head rebuilt at the next top end overhaul since I have read that you should get minimum 60 hours on the valve train and seats. I check the clearance every 10 hours and I haven't needed to re shim anything which I thought was kind of weird but it's still in spec. Thoughts?