Engine is not a flat even surface with no obstacle so the level shown in window is indicatory approximate level it may differ little bit in actual.
Only once we need to fill up to full level thats only during overhauling.
We say 20 w - 40 as viscosity rating which clearly say oil will expand with in certain level more. Than recommend level of oil in engine will increase pressure and that exceeds the holding capacity of engine component and cause wear and tear .


I have made some small light mods on my bike.......




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