SMP Neutral Safety Switch

SMP neutral safety switch for V-twin motorcycles, engineered to OEM specifications with hardened high carbon steel stems for reliable shifting and clutch-in starting. Direct replacement for worn or failed switches on Harley-Davidson and Indian Motorcycle platforms.

Features

• American-made construction
• High carbon steel stems hardened to 48 Rockwell C
• Manufactured to stringent OEM specifications
• Direct OEM replacement

Specifications

• Brand: SMP
• Manufacturer Part #: MCNSS4
• UPC: 091769361310
• Length: 2.7 in
• Width: 4.35 in
• Height: 1.75 in
• Weight: 0.07 lbs

Fitment

Fits V-twin motorcycles, including Harley-Davidson and Indian Motorcycle models.

Frequently Asked Questions

What does a neutral safety switch do?

It prevents engine starting unless the transmission is in neutral or the clutch lever is pulled in, protecting against unexpected engine engagement.

How do I know if my neutral safety switch is failing?

Common signs include the bike starting in gear, the neutral light staying on when in gear, or refusing to start in neutral. A failed switch should be replaced immediately.

Is this a direct bolt-in replacement?

Yes — this is an OEM-specification part designed as a direct replacement for factory switches on compatible V-twin motorcycles.

Do I need any special tools to install this?

Installation is straightforward and requires only basic hand tools. Consult your service manual for your specific model's procedure.