Drag Specialties DS-750704 High Compression Piston Kit Oversize - 1200cc 040 8.5 1

The Drag Specialties DS-750704 is a high-compression piston kit designed for 1948–1980 Harley-Davidson 74-cubic-inch Big Twin engines displacing 1200cc. Engineered to deliver reliable performance and long service life, this kit is a proven solution for engine rebuilds and top-end restorations on classic Big Twin platforms.

Key Specifications:

• Displacement: 1200cc (74 cu. in.) Big Twin
• Bore Size: 3.4375 in. (3-7/16 in.)
• Oversize: .040 in. over standard bore
• Compression Ratio: 8.5:1 High Compression
• Piston Material: Cast aluminum alloy

Kit Includes:

• Two (2) cast aluminum alloy pistons
• Wrist pins and wrist pin keepers
• Piston rings

Important Notes:

• Compression ratios are approximate and calculated using correct-length cylinders as specified
• This kit is part of the Drag Specialties lineup of replacement pistons available for stock and big-bore applications
• Rings are included; if rings need to be sourced separately, Hastings rings are recommended

Drag Specialties piston kits are built to OEM-quality standards using cast aluminum alloy construction, making them an excellent choice for restoring or rebuilding vintage Harley-Davidson Big Twin engines to high-compression performance specifications.