I posted a thread titled "Valves Kissed the Piston" for the first series of the nightmare. Here is part two: After redoing the entire topend again thanks to a forgotten circlip, I am having issued timing the bike. The bike has a new Wiseco std. bore piston and the topend has 5 new valves with the seats cut and the head milled. At TDC the timing is way off for some reason. If I time it so the marks on the cam are level with the head on both the intake and exhaust, I have 12 pins between marks. The only problem is that when I crank it over with the flywheel and a 14mm wrench, i am hitting a valve on the exhaust stroke. Pretty sure it is one os the intakes. So I retimed it totally disregarding the cam sprocket marks and going by the lobe positions on the clutch side. Here is what it looks like. The flywheel mark is dead on with the "I". My question is: why am I hitting valves with it timed according to the sprocket marks? Second question: are the lobes sitting in the right position for TDC? I can turn it over now without hitting valves, but I don't dare start it for fear of losing another 600 bucks in a topend again. Consider me a little gun shy. Anybody care to elaborate what the problem might be?