Is vibrations from the cylinders, pipes, and shifter normal?

[blaster2006]

Hey guys. I just put back my top end together. It starts up fine, but whenever i give it small revs, the cylinders just vibrate, and the pipes and the shifter too. then when its back to normal idle RPM, it stops vibrating. Is this normal? oh and btw i did not torque the nuts on the head down, i just tightened each one in the order given on the head, and tried to make it equal by hand.

[locogato11283]

vibration is normal. its not just your cylinders though. your whole motor, pipes, carbs, kicker and shifter will all vibrate.