2008 Hero Honda Passion Plus what is the cost of a stock piston and cylinder

http://www.cmsnl.com/classic-honda-fansite/wiring_diagrams.php

The above link takes you to lots of Honda wiring diagrams. Yours may be one of them, but I apologise if not.

If the dealer doesn't have it, you might try eBay... If this is an old bike it may be that that is your only option...

Sorry but the statement of your problem is not clear. If you mean that the engine oil level is decreasing over time, then your motorcycle either has a slow oil leak, or it is burning engine oil due to wear on the cylinder and the piston rings, causing oil to bypass the piston rings and enter the combustion chamber where it is burned.

piston ring kaisi lagayi jaati hai

Approx 700 to 800 rs

40000 kms is approx life span of Passion Plus Chain Sprocket