The rockers I am using are bushed. They're not the needle bearing type. What are the design problems with the Mancini and Harland Sharp rockers?. I've never had an issue out of the Mancini rockers yet. I don't claim to be a genius when it comes to the ins and outs of rocker geometry. I just install everything , check the spring height, set the rockers up til they're properly proportioned on the tip of the valve. Make sure the pushrods are of correct length. Check coil bind and seat pressure. Is there something I'm over looking?.
