Valve Spring Cover Adjustment Wrench Set for Harley Big Twin Flathead – Rough Trade USA

This valve spring cover adjustment wrench set is designed for Harley-Davidson Big Twin Flathead engines and is a reproduction of the original tools supplied with factory tool kits.

The wrenches are CNC laser cut from steel and finished with a parkerized coating to discourage corrosion. Copied from original Harley tools, the set provides proper fit and leverage for adjusting valve spring covers while maintaining period-correct appearance.

Designed for Big Twin Flathead applications, this wrench set is suitable for restorations, routine service work, or completing an original-style tool roll where correct tooling matters.

Manufactured in Ohio, USA by Rough Trade. At Boomers Bike Shop, we stock service tools that fit correctly and belong on real vintage Harley-Davidson engines.

Fits Harley-Davidson Models:

Big Twin Flathead engines

⚠️ Designed to match original-style valve spring cover hardware used on Big Twin Flathead motors.