i have a 99' 400ex stock motor...nothing to my knowledge has ever been done to it. its smoking blue at start up and it also gets wasted by other stock 400ex's that are new. ill prolly have 300-400 dollars to use..i know that blue smoke is oil and it has been using oil. i was thinking maybe i should get a stock bore 10.8-1 piston,rings,and have some minor head work done..does this sound like a good idea????