1250cc Big Bore Kit - Black. Fits Sportster 1986-2021

Features & Benefits:-

* Fits Sportster 1986-2021 including Sportster 2004-2021.

* Will Not Fit XR1200

* Includes Black Cylinders.

* Includes Flat Top Pistons.

* Includes Head Gaskets.

* 10.3:1 Compression Ratio with OEM 1200cc

* No rebalancing required.

* Largest bolt-on kit available.

Tech Tip:-

* Will Not Fit with stock 883cc Heads.

* For the best performance CNC head porting, performance cams, exhaust & intake upgrades are reco mmended.

* EFI re-tuning is required.

Proudly Made in the USA by S&S Cycle !

MFR PART No: 910-0691

ROLLIES PART No: SS910-0691