* Engine numbers are not standardized across all quad manufacturers. Each company has its own system for assigning engine numbers.
* Year of manufacture is not always encoded directly into the engine number.
To find the year of your quad, you'll need to:
1. Identify the make and model of your quad.
2. Consult the manufacturer's website or a reliable resource like a parts catalog. They often have information about engine numbers and their corresponding year of manufacture.
3. Contact the manufacturer or a local ATV dealer. They may be able to assist with identifying the year based on the engine number.
Please provide more information about your quad, such as the make and model, to get a more specific answer.