Honda 2 Wheelers India — honda unicorn 160 silencer issue

Address:

Vellore, Tamil Nadu, 635802

About my honda unicorn 160 quality of silencer. Its around 2.3 years completed now i am facing issue in silencer but dealer has explain that it will not cover in warranty. Why within 2.3 years is your quality for the product? For silencer have to pay 8000rs. For replacing new one. Why i have to pay for new one.
Registration no. Tn83 y2927

I want to claim in warranty.