The reliability of a fuel pump can vary between different motorcycle models and brands, including Yamaha and Royal Enfield. While it's true that Royal Enfield has had some reported issues with fuel pumps in the past, it does not necessarily mean that all Royal Enfield bikes or the Yamaha FZ have unreliable fuel pumps.
The Yamaha FZ series has generally been well-regarded for its reliability and performance. However, it's important to note that individual experiences may vary, and there can always be isolated cases of component failures or issues with specific motorcycles, regardless of the brand.
To get a more accurate assessment of the fuel pump reliability in Yamaha FZ models, it would be advisable to consult owners' forums, online reviews, or speak with Yamaha FZ owners who have firsthand experience with the model. They can provide you with insights into the specific strengths and weaknesses of the bike's components, including the fuel pump. Additionally, regular maintenance and proper usage can also contribute to the overall reliability and longevity of the fuel pump and other components.