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piston clearance

4K views 4 replies 3 participants last post by  kccats 
#1 ·
I have some pistons that are .010 (.25mm) over stock for a Fuji 488 lc. I have acquired a new used top end that had stock pistons. The cylinders were rough and needed honing. i would love to avoid seizing anything up :laugh: Question is how much clearance should I have?
Stock pistons are 72mm and I am looking to use 72.25mm
Thanks!
 
#2 ·
In general, the clearance varies by engine and whether it is fan or LC.
If I remember correctly, the clearance on the 488 is .005 or so.
So to use the 72.25 pistons you would have to have the bore opened up.
 
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