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So , I got a newer 700 twin, the piston to wall clearance right from the factory is huge, I`m thinking around .012 to .014 if I put in  .010 oversize pistons from say wiesco or oem and in the end wound up with say .003 to .0050 clearence,  is there anything I should know about as far as expansion rates? Was there a idiocinctracy  about the 700 doo twin  motor,  where it somhow needed big clearences?? Pistons can be built to expand differently, is there a manufactuer that adresess  this?
 

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Your best bet would be to follow the manufacturer's specs on stock motors.I personally like them on the high side of the specs.
 

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Ballsout1 .003 is pretty tight.  The guy that does all of my boring won't go any tighter then .005      Riley
 
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