how to remove old rotter kit

do u need a balancer puller to do this i have a lifian 140cc and have bought a irk for it and is the oil slinger behind that

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Yes you need a flywheel puller and no the oilsling is on the other side where the clutch is !

The oil spinner aka "SLING" (centrifugal oil filter / harmonic damper) is on the right hand side of the crank inside the clutch cover :

http://us.st11.yimg.com/us.st.yimg.c...1966_487931617

You need to use a 4 pronged tool to undo the special nut inside after removing the 4 phillips head screws and the outer cover :

http://us.st11.yimg.com/us.st.yimg.c...1966_179391596

You should use a proper flywheel puller to remove the flywheel and NEVER hit it with a hammer OR try to lever it off with long screw drivers etc :

http://us.st11.yimg.com/us.st.yimg.c...1966_162870574