SG-B136-MS3 — GSR Mainshaft 3rd Gear

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SG-B136-MS3 — GSR Mainshaft 3rd Gear

Description

The SG-B136-MS3 is a mainshaft 3rd gear for Honda B-series (GSR/B18C) gearboxes. Precision-hobbed helical teeth with edge relief, plus a ground bore and faces, deliver quiet, rigid mesh and crisp synchro engagement with the mating countershaft 3rd gear—making it a true drop-in for rebuilds or performance refreshes.

Specification

Tooth Count: 25T

Tooth Form: Helical

Material: SCM415 / SAE 8620 alloy case-hardening steel (or equivalent)

Heat Treatment: Carburized & quenched

Surface Hardness: HRC 58–62

Manufacturing: CNC turning/milling; precision hobbing; dog-tooth finishing & deburring; bore & locating faces precision-ground