Q. How many kms we can ride on Honda CB Unicorn 150 with the company brand chain sprocket?

This is second UNICORN bike for me. The 2006 make (Spokes Version) needed change of Chain Sprocket set after 15000kms. But the 2012 make bike needed change after 35000kms. There are also other factors linked to this like driving style sudden acceleration, sudden breaking, city or highway, good road condition or rural roads, terrains, etc. Importantly don't expect the same quality and performance like the one came factory fitted with the bike. All spares are purposefully made inferior to promote income to the manufacturing company by the way of spares and service.

Mine is a normal riding Honda Unicorn 150 BS IV 2020 model wear and tear the company fitted drive chain sprocket set given me beyond 51500 kms. Every 1 k I did clean and lubricate with 20/40 engine oil, so far the set gives good performance

It's depends upon the riding person and road condition but i think should go for 12000-15000 KM.