Honda NSR250R MC16 RC Exhaust Valve Servo Control Motor 1986-1987 31420-KV3-701

Product Description

This OEM Honda RC Valve servo motor assembly works with the bike’s PGM ignition control unit to operate the dual-cable variable exhaust valve system. It rotates the pulley according to engine RPM, adjusting exhaust port timing to improve low-to-midrange torque while maintaining strong high-RPM two-stroke performance. Component Specifications Primary Function: Automatic exhaust valve timing and backpressure control. System Type: Honda RC Valve Actuator. Drive Mechanism: Electric stepper motor with dual-cable rotary pulley. Construction: Heat-resistant composite housing, rubber vibration mounts, wiring connector, and zinc-plated pulley. Compatible Models Honda NSR250R MC16 — 1986–1987 Variants: NSR250R-G / NSR250R-H OEM Reference: 31420-KV3-010 Honda NSR250R MC18 — 1988–1989 Variants: NSR250R-J / NSR250R-K / SP OEM Reference: 31420-KV3-701 Note: MC21 units use different electrical specifications, so wiring and controller compatibility should be verified before installation.