Cylinder Barrel Flex-Hone 76mm 180 Grit PN# TBS-35-9140

Cylinder bore finish honing is an important step in the preparation of cylinder walls prior to fitting new pistons and rings. The flex-hone provides a fast and efficient final finish of a freshly bored and honed cylinder barrel. This is an indispensable tool for the builder of vintage British 650 and 750 twin-cylinder engines.

This professional quality flex-hone is sourced from K&L Supply and is sized for 71mm-76mm bores, with coarse 180 grit globules of silicone carbide or aluminum oxide laminated to the ends of bristles on a flexible shaft.

Used correctly, the finish hone provides a consistent cross-hatch pattern for oil retention and quick piston ring seating. The finish honing process is performed after cylinder boring and the final sizing of the bore diameter with a multi-stone hone.

The flex-hone is plunged in and out of the cylinder bore using a drill to establish the cross-hatch pattern. It is important to thoroughly wipe down the bore after finish honing to remove any residual honing grit that may be present. Warm soapy water and a clean cloth is recommended for cleaning the bores.