Standard Motor Products Harley Transmission Neutral Safety Switch 33900‑59 | Fits Softail FXST, Tour Glide FLT, Super Glide FXR, Heritage FLST, Sportster XL (1959–1998)

OVERVIEW

This transmission neutral safety switch restores accurate gear-position feedback and prevents starter engagement when the motorcycle exceeds idle speed. Constructed from zinc-plated materials, the durable electrical component acts as a direct factory replacement built to protect drivetrain components on Harley-Davidson Sportster motorcycles.

ENGINEERING & PERFORMANCE

The internal contact assembly delivers consistent electrical signaling under high-vibration conditions, ensuring the neutral warning system triggers precisely when shifting from gear to park. A zinc-plated exterior shields the mechanism from road salt, moisture, and transmission fluid exposure, which extends functional lifespan significantly past cheap replacements. Engineered as a direct swap for Harley OE number 33900‑59, the unit bolts directly to the transmission casing without requiring harness adapters or calibration tools.

KEY FEATURES

• Replaces Harley‑Davidson OEM part number 33900‑59
• Zinc-plated exterior for enhanced corrosion resistance
• OEM-style physical dimensions for plug-and-play mounting
• Provides accurate neutral indication and secure starter cutoff
• Maintains contact integrity despite continuous engine vibration
• Direct-fit geometry removes custom wiring or machining
• Cost-effective solution for routine transmission servicing
• Supports extensive model runs across legacy Harley families

TECHNICAL SPECIFICATIONS

• Brand: Standard Motor Products
• Part Name: Transmission Neutral Safety Switch
• Part Type: Electrical
• Material: Zinc-plated
• Supported Years: 1959–1998
• Compatible Trims: Touring, Softail, Sportster

FITMENT

• • Harley Touring (1973–1998)
• • Harley Softail (1986–1998)
• • Harley Sportster (1959–1998)

WHY HARLEY RIDERS CHOOSE THIS

Riders select this exact neutral safety switch when restoring aging big twins or tuning Sportsters because it guarantees crisp, clutch-free starts without triggering dealer-level diagnostic trips. The zinc-plated finish actively fights the heavy road grime and heat cycles typical of vintage transmission housings, keeping contact pressure stable through thousands of miles. Since it mirrors factory internal geometry, it returns instant ignition response and eliminates the dangerous habit of wheels rolling forward unintentionally. Whether replacing a corroded factory unit or prepping a machine for local inspection, this switch delivers proven reliability across decades of Harley architecture.