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PERFORMANCE MOTORCYCLE PARTS AND KITS FOR AMERICAN V-TWINS

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3.927" Bore Pistons for 106" Top End Kit

 
 
 
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$348.95
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Description
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These pistons are only recommended for use in S&S cylinders which are made with a high strength liner material. Compatible with tapered or standard rods.

 

 

 S&S® 3.927" BORE FORGED PISTONS 106" TOP END KITS  
 Displacement    Deck Height    Stroke    Standard    +.010"  
 106"    1.083"    4 3⁄8"    106-3690   106-4416

 

NOTE:
S&S 3.927” pistons are machined to such close tolerances that it is not necessary to measure the piston. Additionally, the low friction coating on the piston skirt makes taking measurements very difficult. Therefore, bore cylinders to nominal diameter +/- 0.0005” for correct clearance. Current production pistons have micrometer windows in the coating on the piston skirts that allow accurate measurements to be taken. These pistons may be installed by honing cylinder to nominal diameter +/- 0.0001" or by measuring piston and honing cylinder to achieve .002" - .0025" close clearance for street applications or .0032" - .0045" loose clearance for immediate competition use.

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