I just sent my head into the reconditioners because the left intake valve kept closing up to zero clearance, my bike is an 04 RMZ250. I know everyone has been over this topic a thousand times but, My question is what valves should I get? I'd like to get at least 120 hours out of my valves. I'm thinking faction mx Stainless Steel Intake valves combined with stock exhaust valves because the 04 was said to have valve problems. Is this a good setup or should I go all stainless or all titanium? I thought the exhaust valves were more reliable than the intakes, so this way it would fix the problem and not be too expensive. The engine reconditioner says that if the titanium valves are installed properly they should be fine, but I am not sure because of reading posts about valves on this site. Also do SS valves require hardened buckets or not? Please help Thanks in advance.