S&S Cycle 4-1/4 Inch Bore Cylinder Set Fits Harley-Davidson M8 2017-2023

S&S Cycle 4-1/4 Inch Bore Cylinder Set Fits Harley-Davidson M8 2017-2023

A pair of S&S Cycle big bore cylinders for the Milwaukee-Eight in the Black Granite finish with highlighted fins. The 4-1/4 inch bore takes a stock-stroke 107 to 124 cubic inches and a 114 or 117 to 128 cubic inches. Cylinders are supplied without pistons and are bored slightly under finished size and not honed, so they are finish-honed to the pistons at assembly.

Key Features

• S&S big bore cylinder set, 4-1/4 inch bore, sold as a pair
• Black Granite powder coat with highlighted (machined) fins
• Supplied unhoned and slightly under size for finish honing to the chosen pistons
• Current S&S part number 910-0739A, which supersedes 910-0739
• Made in the USA by S&S Cycle

Technical Specifications

• Bore: 4-1/4 inch
• Resulting displacement: 124 cubic inches on a 107 (4-3/8 inch stroke), 128 cubic inches on a 114 or 117 (4-1/2 inch stroke)
• Finish: Black Granite with highlighted fins
• Honing: Unhoned, bored under size
• Weight: 24.85 lbs per set
• Country of Origin: USA

Fitment Notes

• Compatible with Harley-Davidson 2017-2023 Milwaukee-Eight Touring and 2018-2023 Milwaukee-Eight Softail models.
• Pistons, rings, gaskets and head bolts are sold separately; S&S recommends its 900-1006 head bolt kit.
• The cylinders must be finish-honed to the pistons before assembly.
• Not legal for sale or use in California on pollution-controlled vehicles; competition use only where emissions rules apply.
• Not affiliated with or endorsed by Harley-Davidson.