3.937"  Bore Cylinder for S&S 98" and 107" Big Bore Kits for 1999-'16 Big Twins - Wrinkle Black Finish

3.937" Bore Cylinder for S&S 98" and 107" Big Bore Kits for 1999-'16 Big Twins - Wrinkle Black Finish

Item #: 910-0477
5.0 out of 5
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$374.10
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This is a replacement cylinder for engines with either 98" (1999-'06) or 107" (2007-'16) S&S bolt-in big bore kits. Cylinder fits front or rear positions. Order two cylinders for a set. Cylinders are honed to size for replacement pistons. No piston fitting is necessary unless additional clearance for immediate racing applications is desired.  Sold each.

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5 out of 5

107" BAGGER

I did my 107" swap about 4yrs. Ago. Over this past winter I pulled the upper End down to check thing out, I BREEZED the cyls. with a hone, some new "O" Rings and a new set of piston rings, and with any luck, I will get ANOTHER 30K miles. Engine always ran great, S/E Pro Performance Heads, Woods 777 cam, programmable S/E ignition and a 44mm CV carb. 115hp & 108ft. Lbs with LOW setting on the ign. Great kit, QUALITY pieces

I would recommend this product

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S&S 3.937" 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 of early production pistons with out micrometer window makes taking measurements very difficult. Therefore, hone cylinders to nominal diameter +/- 0.0001" 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.
Disclaimer

NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE. NOT LEGAL FOR SALE OR USE ON ANY EPA POLLUTION CONTROLLED MOTOR VEHICLE.