This is common for valvoline 4t champ to start cleaning immediately after pour in engine.
Some thing like this was observed when it was first poured in RM cd200 , after running bike for 500 km it started to become more responsive and silent.
At 2nd oil change ride was very smooth,silent and responsive and still is after several oil change.
U need to wait At least 500km for valvoline to show its good side.
Sent from my ALE-L21 using PW Forums mobile app