6D3-12411-00-00 Thermostat 140°F for Yamaha SX 250 1900 2024-2026

Thermostat for Yamaha SX 250 1900

This thermostat for Yamaha SX 250 1900 models from 2024 through 2026 regulates coolant flow to keep engine temperature at a steady 140°F and carries the 6D3-12411-00-00 part number.

Overview

This thermostat for Yamaha SX 250 1900 keeps the engine running at its intended 140°F operating temperature by opening and closing with coolant flow changes. It replaces the factory thermostat for Yamaha SX 250 1900 machines built between 2024 and 2026, using the 6D3-12411-00-00 reference. Designed for riders and mechanics who need a dependable replacement for a stuck or worn thermostat.

Built For Performance

• 140°F opening temperature matches the factory spec for the SX 250 1900
• Cross-references part number 6D3-12411-00-00
• Constructed with a wax-pellet element for consistent open and close cycles
• Seals against the housing to prevent coolant bypass
• Fits 2024 through 2026 model years

Fits These Machines

• for Yamaha SX 250 1900, 2024
• for Yamaha SX 250 1900, 2025
• for Yamaha SX 250 1900, 2026

On-The-Job Use

• Replacing a thermostat that sticks open and keeps the engine running cold
• Fixing an overheating condition caused by a thermostat that will not open
• Routine cooling system service on the SX 250 1900
• Refreshing the cooling system before the season starts

Specs At A Glance

Good To Know

Q: How do I know if my thermostat needs replacing? A: A thermostat that sticks open causes the engine to run cold and warm up slowly, while one that sticks closed leads to overheating, so either symptom points to replacement.

Q: Does this come with a gasket? A: This listing covers the thermostat only, so check whether your housing gasket or O-ring needs a separate replacement during installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.