My 87 DT85 is having cooling problems as some of you are allready aware<br />there is a new twist<br />I pulled the powerhead to check gaskets <br />when I pulled the exhaust cover I noticed that<br />#2 piston & cylinder are scuffed <br />compression before I dismantled was 155,145,142<br />should it be rebuilt now or when it starts running poorly<br />thanks in advance for your comments