A good friend of mine asked me to help him do a top end on a bike he just bought. He bought some new kibblewhite valves from an ebay store. We brought the head to a local machine shop and they touched the valve seats and matched the valves to their holes. We did the actual head assembly ourselves and I found that the outside valve clearances were off the charts. Ive been scratching my head and considered having the outside seats recut to make up the difference. At this point it appears we may have got two center valves and one outside valve and the machine shop didnt know any better and set it up with the longer valve in the center. I need to know whether the center valve is suppose to be longer than the outside valves because thats the setup we have now. These are kibblewhite white diamond valves and I have one valve that is 3.040" and two that are 3.000". Thanks in advance!!