i have a honda on my toro 413. this thing rattles at high rpm. i pulled the motor, had it bored, replaced the piston, rod and had the crank checked. sent the head to a machine shop and had it rebuilt. Put it all together, and it still rattles. doesnt burn oil anymore and runs great, it just has this rattle. the pistion is in the correct way, the valves are adjusted correctly. not sure what else to look for.
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