New ring piston

[dunes_rider]

guys last week when i raced with 400ex has only trinity pipe and my ex : curits sparks x-6 _ K&N filter _ dgree key _ CDI _ dyno jet
and he win ... damn i cant feel the power of my ex why??
so my friend told me you should change your ring piston ,
because my ex model 2000 , since that time i didn't change anything in my engine and now we will be in 2006 , so what do you think give me your opinions please

[Wandell]

If you have never done anything to the top end, it may need new rings or at least have the valves adjusted.