S&S Cycle 310-0401B T124 Low Compression Long Block Engine - Black

The S&S Cycle 310-0401B is a 124 cubic inch T124 Low Compression Long Block engine finished in an all-black powder coat. Built for riders who want a significant displacement upgrade while retaining compatibility with existing fuel and ignition components, this long block delivers serious performance gains in a bolt-in package made in the U.S.A.

Key Specifications:

• Displacement: 124 cubic inches (2,032cc)
• Bore: 4-1/8"
• Stroke: 4-5/8"
• Compression Ratio: 10.2:1 (low compression)
• Camshafts: S&S 585 gear drive Easy Start cams
• Oil System: S&S TC3 cam plate and high-flow oil pump
• Finish: All-black powder coat
• Pistons: Forged flat-top

Key Features:

• Includes S&S Super Stock cylinder heads and T2 crankcase
• Long Block design — does not include fuel or ignition system; compatible with existing aftermarket or stock throttle body and EFI tuner
• Cylinder heads are specially machined to compensate for the non-stock cylinder length, ensuring stock-length intake manifolds and throttle bodies fit without modification
• Breather vent bolt locations match stock positions — compatible with stock and most aftermarket air cleaner backing plates
• Low 10.2:1 compression ratio offers greater tolerance for variations in fuel quality and is better suited for heavier touring loads
• Stock non-programmable engine management systems are not recommended for use with this engine
• Oil line installation kit required (sold separately)
• Made in the U.S.A.
• Two-year warranty

Important Notes: Cylinder heads are 1999–2005 style. This engine is not compatible with Softail models or Twin-Cooled Touring models. Not recommended for Tri-Glide or other three-wheel conversion models. Not legal for sale or use in California on pollution-controlled motor vehicles.