I'm due for a top end in a few months and I am thinking about doing some stainless valves. Are there any other things I can do to the head/top end to give me peace of mind? Stiffer valve springs? Also I have heard that you suffer a power loss with the stainless valves. My bike is a 250f so I really can't afford any power loss but if it isn't too much I figure why the hell not. Maybe ill balance it out with a port/polish? I have some help but these guys are really cool so I don't want to take advantage of them. I am still largely footing the bill myself so I need an "old chevy truck" of a bike so to speak. Up until this point I've just kept my bikes stock.