Parts Unlimited Starter Motor for Honda TRX300 / TRX300FW FourTrax, ATC 250ES Big Red, ATC 250SX, TRX250

OVERVIEW

This high-quality starter motor delivers reliable starting power for Honda ATV and ATC models, ensuring consistent engagement and rapid engine turnover. Constructed with an insulated armature and durable 90/10 copper bushings, it provides robust electrical performance under demanding off-road conditions. Designed as a direct replacement unit, it restores factory-level starting capability for Honda motorcycles, ATVs, and utility vehicles without requiring system modifications.

ENGINEERING & PERFORMANCE

Engineered to meet or exceed OEM specifications, this starter motor maintains stable voltage delivery and strong cranking torque even after extended idling or cold weather exposure. The fully insulated armature shields internal windings from moisture and corrosion, while precision-molded rubber seals on both ends ensure consistently dry operation during heavy use. Heat-resistant copper bushings reduce friction and prevent early wear, supporting smooth gear rotation under load. As a bolt-on direct replacement, it integrates seamlessly into existing electrical systems without wiring adapters or bracket adjustments.

KEY FEATURES

• Insulated armature protects against rust and corrosion
• Rubber seals on top and bottom for dry, reliable operation
• 90/10 copper bushings for extended service life
• Direct replacement for multiple Honda ATV and ATC models
• Meets or exceeds OEM specifications
• Restores reliable starting performance for worn or failing units
• Compatible with OEM reference numbers 1280004400, 31200-HA0-773, and 31200-HC4 series

TECHNICAL SPECIFICATIONS

• Brand: Parts Unlimited
• Part Name: Starter Motor
• Component Type: Starter Motor
• Materials: Insulated Armature, 90/10 Copper Bushings
• Supported Years: 1985–1987, 1988–2000
• Compatible Trims: TRX300 FourTrax, TRX300FW FourTrax 4×4, ATC 250ES Big Red, ATC 250SX, TRX250 FourTrax

FITMENT

• Honda TRX300 FourTrax (1988–2000)
• Honda TRX300FW FourTrax 4x4 (1988, 1990–2000)
• Honda ATC 250ES Big Red (1987)
• Honda ATC 250SX (1987)
• Honda TRX250 FourTrax (1985–1986)

WHY RIDERS CHOOSE THIS

Riders select this starter motor because it reliably eliminates weak cranking and dead-on-start issues that commonly plague aging Honda utility machines. The insulated armature and dual-end rubber seals actively block water and trail debris from reaching critical electrical contacts, dramatically reducing short-circuit failures after washouts or mud runs. Long-lasting copper bushings maintain precise internal clearances despite constant vibration, ensuring clean flywheel engagement and sustained startup speeds. Because it replicates exact mounting geometry and internal drive ratios, installation is purely swap-and-go, giving daily trail riders and weekend mechanicians a predictable, maintenance-light solution that keeps engines turning when they need them most.