Looking for some advise on keeping my 87 250r from overheating. It has a stroker piston with a cool head. I am now going thru a 2nd piston due to over heating and blowing a small hole on the top of the piston. I went thru the water pump and made sure it was not obstructed and have changed my plug to a BR9ES. I was considing a PWR radiator, but I was also looking around the internet too see if anyone makes a hy-flow impeller. Any advise!!!!!