Choosing between the Yamaha FZS V3 and the Bajaj Avenger 160 depends on your specific preferences and requirements. However, considering your priority for comfort and your daily commute on both highways and bad roads, here are some factors to consider:
Comfort: Both bikes offer different riding positions and comfort levels. The Yamaha FZS V3 has a sporty riding posture with slightly forward-leaning ergonomics, which may not be ideal for someone with back pain. On the other hand, the Bajaj Avenger 160 has a more relaxed cruiser-style riding position with a comfortable seat and an upright riding posture, which can be more suitable for riders with back pain.
Suspension: The Yamaha FZS V3 features a front telescopic fork and rear mono-shock suspension setup. It offers good handling and stability on various road conditions. The Bajaj Avenger 160 comes with a telescopic front fork and twin rear shock absorbers, providing a plusher ride and better shock absorption on uneven surfaces.
Power and Performance: The Yamaha FZS V3 is known for its sporty performance, featuring a 149cc engine with a decent power output and quick acceleration. The Bajaj Avenger 160, on the other hand, has a 160cc engine that delivers a slightly lower power output but focuses more on low-end torque, which can be beneficial for navigating through bad roads and city traffic.
Fuel Efficiency: Both bikes offer good fuel efficiency, but the Bajaj Avenger 160 tends to have a slight edge in this department due to its engine tuning and focus on low-end torque. This could be beneficial for your daily commute of 50 km.
Considering your priority for comfort, the Bajaj Avenger 160 with its relaxed cruiser-style riding position, comfortable seat, and better shock absorption may be a better choice for you, especially considering your back pain and the bad road conditions you'll encounter. However, it's recommended to test ride both bikes if possible and evaluate how they feel for your specific needs. Additionally, consider factors such as pricing, maintenance costs, after-sales service, and personal preferences before making a final decision.