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Discussion Starter · #1 ·
I have a 1981 Sportster and had the original jugs bored out. I have "Custom Chrome Premium" Pistons (Part# 56055). I am looking for the manufacturer's recommended clearance spec that came in the box. I have made some phone calls and have gotten anywhere from .002" to .004".
 

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Increased the piston clearance to .003+ It is much quieter now. Still doesn't sound right. I am looking for the manufacturer's spec. that came in the box for any part numbers 56053 thru 56059. A harley tech told me the nnoise might go away after 500 miles!?
 

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vandodge72 said:
Increased the piston clearance to .003+ It is much quieter now. Still doesn't sound right. I am looking for the manufacturer's spec. that came in the box for any part numbers 56053 thru 56059. A harley tech told me the nnoise might go away after 500 miles!?
Custom Chrome's # is 800 359 5700. Ask for tech............Bill
 
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