Case in point, have you ever priced a NIKASIL cylinder , piston and rings? Throw away engines[] too true. A friend brought me a polaris ATV to tune up. He paid $1000. for it used. When it was started you could hear the piston slap at idle, ting, ting, ting. Lower skirt was excessively worn. I priced a new NIKASIL cylinder, piston and rings and it was over $400.00 not including my labor.[] he brought the thing to the scrap yard.