When turning it over it will engage but only for one revolution, I took out the spark plugs and the motor turns over fine. The motor has been bored out to 1450 cc so I am suspecting that the starter doesn't have enough power, since I've heard it was an issue with shovelheads. I checked to see if the pushrods were seized but they were ok, so the starter is the only thing I can think of. Any suggestions would be great.