hello, about 2 months ago i rebuilt my topend because of a melt down on middle piston. put it all back together fixed the problem of why it melted and have been driving it since. sat morning i let it worm up took it for a 5 min rip and when i came back i noticed my engine had a nocking, ticking sound now it doesn't sound like its the topend but its hard to tell, my engine has a mild vibration, my primary isn't wobbling or anything could this be a crank bearing starting? i would like to get it before i gets me!!! any help or resent experiences would be appreciated 
