For all Evolution Big Twins. More displacement with stock-like reliability that makes those engines perfectly suited for long two-up trips. When installed in a stock 1343 cc engine the displacement increases to 1442 cc. Cases must be bored for the larger cylinders. S&S Big Bore cylinders feature much more stability than original cylinders with all critical areas reinforced. A slightly increased compression ratio provides additional torque but does not affect the longevity. Each complete kit contains Big Bore front and rear cylinder, two pistons with rings and bolts, head and base gaskets.
The cylinders are 4.5 mm shorter than stock. Adjustable pushrods and shorter cover retainers are required.
- fits Evolution Big Twin 1984-1999
- aluminum, cast finish / bare
- length: 5.375”
- nominal bore: 3-5/8 ”
- compression: 9.5:1
- with forged pistons
S&S Power KitsSince the first V-twin rolled out of Milwaukee there were people who thought about increasing the displacement in their search for more horsepower and since 1958 there´s none who does this better than S&S. Stroker flywheel assemblies and big bore cylinders, installed as separate components or in combinations allow to achieve various displacement increases. Depending on your personal needs and preferences choose from different kits for increases up to 116 cubic inches. The performance of S&S components has been proven in thousands of engines on the open highways as well as on the race tracks of the world and the brand name is synonymous for highest quality in material and guaranteed positive horsepower results.
Have any questions?
Our service team will be glad to help out: Mondays - Thursdays 09:00-16:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: firstname.lastname@example.org