Here's why:
* Model Year Variation: The specific oil requirements can vary significantly between different model years of the RT-100. Yamaha has made changes over time.
* Owner's Manual: The most reliable information will be found in your Yamaha RT-100 owner's manual. It will have the exact oil specifications for your model year.
* Safety First: Using the wrong oil can damage your gearbox. Always refer to the manufacturer's recommendations.
Where to find the information:
1. Your owner's manual: If you still have it, it will contain the essential information.
2. Yamaha website: You can often find information about your specific model on Yamaha's website. Search for your model year and the "owner's manual" or "specifications."
3. Authorized Yamaha dealer: A local Yamaha dealer can provide you with the correct oil type and specification for your RT-100.
Important Note: Never use motor oil in your gearbox. Gear oil has different properties and is specifically designed for gearboxes.
