The top speed of a classic Royal Enfield Bullet motorcycle can vary depending on several factors, including the specific model, engine displacement, modifications, riding conditions, and rider weight.
In general, the top speed of a stock classic Royal Enfield Bullet with a 350cc engine is typically around 70-80 mph (113-129 km/h). The larger 500cc engine variants may be capable of slightly higher speeds, reaching around 80-90 mph (129-145 km/h) under optimal conditions.
It's important to note that Royal Enfield motorcycles are not primarily designed for high-speed performance but rather for comfortable cruising and leisurely rides. Their design and engineering emphasize torque and low-end power delivery, making them more suitable for relaxed riding experiences and enjoying the journey rather than chasing top speeds.
If you are looking for specific performance figures for a particular model or engine variant, it's always a good idea to consult the official specifications or reach out to Royal Enfield directly, as they may have different variations and updates in their lineup that can affect the top speed capabilities.