Hi i just rebuilt my head with a .50mm o/s piston new bearing and circlips and pin. Now my question is that the piston has alot of side to side play, like the bearing doesnt stay in the rod it moves as you move the piston. Is this normal or is the rod bad, i dont think in the piston chamber it will move but wanna make sure b4 i start it?

 

I'm not exactly sure what your saying but, you said you got new circlips. Those should keep that bearing in place to prevent them from sliding.

 

It's normal to have side to side play before you slide the piston into the cylinder.