1250cc kit for 91-20 Sportster 1200 3-9/16" bore 3-13/16" stroke; 11:1cr (w/ stock XL1200 62cc domed heads)

Aerospace-grade all-aluminum cylinder with nickel-silicon-carbide (NSC) electroplated bore

No sleeving allows for larger bore sizes

NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan

Monster big bore kits will require case boring

Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for NSC cylinders and a head/base gasket set

Replacement gasket sets available separately

Upgraded cylinders studs and head bolts recommended

Made in the U.S.A.

COLOR/FINISH NATURAL SILVER
BORE SIZE 3.5625"
DISPLACEMENT 1250 CC
STROKE LENGTH 3-13/16"
COMPRESSION RATIO 11.0:1