I have cultus 2005 carburation engine, having issue of idle speed is not stable, giving low fuel average... What is the reason behind it, many time i adjusted carburetor from mechanic but after drive 50-60 km it becomes down from 1000 to 400rpm
Looks like carburetor has completed it's life
Most probably it is a lucky with either the vacuum pipes or the idle fuel passages have become blocked.
Both things are fixable
