Here's a breakdown of the frame number:
1. Manufacturer Code: The first character, "4," identifies the manufacturer as Yamaha.
2. Model Code: The following two characters, "U3," represent the 125cc Tri-Moto model.
3. Year Code: The next two digits, "01," indicate the year the vehicle was manufactured. In this case, "01" corresponds to the year 1981. Please note that Yamaha follows a different year coding system compared to motorcycles and ATVs.
4. Sequential Production Number: The remaining digits "11192" represent the sequential production number of the Tri-Moto 125 for that particular year.
Therefore, your Yamaha Tri-Moto 125 with frame number 4U3-011192 was manufactured in 1981.
