Hi all, My '06X came to the point where I needed new valves. Actually, it came to that point 4 years ago, and I haven't ridden it since, due to my social circles changing their priorites, and I got left alone as the only one still owning a bike. I feel like a different person without riding, and I hate it. It's time to get back in the saddle. I'll ride alone if I have to. Anyway, I went with AS Racing and the TRX valves. The head is back, and looks brand new! Questions now though... I welcome as many informed answers as possible. Answer any or all of these as you like. 1. I assume it's time to replace the piston, but also don't believe in making assumptions in life. Should I go ahead and just do it, or measure specs first. I already have the new piston and rings waiting for me. I don't otherwise plan on needing to take the head off again, but it was not that difficult to me. If so, how do I measure. Can I use the same flat feeler gauges I check valve clearance with? 2. Since the pistons have cutouts for the valves, do I need a different Piston since my intake valves are now 36mm instead of 35mm, or do the piston notches fit either valve? Again, I assume any piston is fine, but that's a serious assumption. But I've not seen anyone ever mention it here. 3. I pre-bought a top end gasket kit from Athena. I since read that OEM is the only way to go (not a consensus, just one person really). But I already own this kit, and am poor. Anyone else want to chime in on Athena gasket kits? It's a top end kit, from the base gasket up, including valve cover gasket. I'm open to suggestions. 4. Carb - bike has been sitting for almost 4 years, gas is drained out now, but for the first year, it wasn't, because I didn't plan on it sitting at all. So I expect it to be bad. What should I look for to clean and/or replace in there? 5. To sum up, I've got new valves installed already, a new piston and rings ready to go, top end gasket set, and new camchain waiting. Any other parts I should replace or check while I'm in there? Do I need to replace the piston pin and circlips? I heard someone mention cam chain tensioner and guides, but I don't want to be overkill on this and just be throwing money at it. Sorry for all the questions, I just like to be prepared. I know some of this stuff has been covered before in various posts. Any other non-solicited tips welcome.