After start riding the 150F, within a week time, I started having back pain. I went to service center, complained it. They pressed the seat, checked it's sag. Convinced me suspension has no issues. I raised a complaint from Bajaj website, then ASC said, my suspension was replaced and closed my complaint.
But back pain continued. No idea what went wrong. The seat height is not stable, it is getting reduced after riding for a while.Also in hot climate, it is lowering.