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SYM HD200 - Coolant Thermostat

When performing maintenance on your SYM HD200, relying on accurate engineering data is critical. Below you will find the complete OEM specifications, torque settings, and installation requirements for the Coolant Thermostat.

Engineering Specifications Table

OEM Part Number19300-H9A-000
Component NameCoolant Thermostat
Brand / Model FitmentSYM HD200
Dimensions / SizingStandard 22mm bypass
Torque SpecsHousing bolts: 10 Nm
Fluid / Electrical SpecsOpens at 71°C (160°F)
Cross-CompatibilitySYM Citycom 300i

Installation & Torque Warning

Improper installation of the Coolant Thermostat can lead to severe mechanical failure. Always ensure that the mounting surfaces are clean and free of debris. When tightening fasteners, it is mandatory to use a recently calibrated torque wrench. The manufacturer specifies a torque value of Housing bolts: 10 Nm for this component. Over-tightening can strip the threads or warp the housing, while under-tightening may result in excessive vibration and part detachment during operation.

OEM Verification & Reliability

For optimal performance of your SYM HD200, verify that you are installing a genuine part matching OEM number 19300-H9A-000. While aftermarket alternatives might seem cost-effective initially, they frequently suffer from dimensional inaccuracies that compromise the overall system integrity. Genuine parts are manufactured to exact metallurgical and dimensional tolerances designed specifically for your scooter's engine dynamics.

Frequently Asked Questions (FAQ)

1. How often should I inspect the Coolant Thermostat on my SYM HD200?
Routine inspection intervals depend on your riding conditions, but it is highly recommended to inspect this component during your standard service intervals (usually every 3,000 to 4,000 miles). Look for signs of abnormal wear, heat discoloration, or loss of structural integrity.
2. Can I use a generic replacement instead of the OEM 19300-H9A-000?
Using generic or unbranded parts is strongly discouraged by service professionals. The exact dimensions (Standard 22mm bypass) and material composition of the genuine component are required to safely handle the operational stresses of the scooter.
3. What is the most common mistake when installing this part?
The most frequent error is ignoring the factory torque specifications. Failing to apply the required Housing bolts: 10 Nm disrupts the mechanical equilibrium of the assembly. Always refer to your factory service manual alongside these specifications.