107ci Big Bore Kit – Silver. Fits Twin Cam 2007-2017.

Product Details









Features & Benefits:-* Includes 3cc Dome Forged Pistons.* Includes 0.045in. Head Gaskets.* 3.937in. Bore.* 4-3/8in. Stroke.* 10.5:1 Compression Ratio with Stock 85cc Heads.* 10.1:1 Compression Ratio with S&S 89cc Heads # SS106-3255Tech Tips:-* Use Care during assembly to avoid damage to Cylinder Spigots.* Ring gaps must be checked & Recorded by the assembling Technician.* Piston to Cylinder Clearance must be checked by the ass embling Technician & Cylinders honed with torque plates fitted if required.* Rev Limit should be set at 2500 rpm for the first 80klm.* Rev Limit should then be set at 3500 rpm for a further 1,500klm.5t* To prevent Detonation, Over fuelling etc a Proven EFI Map is required to adjust the Factory Fuel & Timing Calibrations & bring your Engine into Equilibrium with your new Mods.* Will Not Fit with S&S 79cc Heads.Proudly Made in the USA by S&S Cycle !
MFR PART No: 910-0480

ROLLIES PART No: SS910-0480