Just replaced the air filter,oil filter and Oil (Yamahalube SS) around 10k KM the bike is at 12K KM approx. The rattling noise started when the bike was 9K on the odo.
I have took it to yamaha SVC couple of time they just did Carb tuning, the effects fade away in 5-10kMs, the noise is back.
I enquired with a mechanic who works at small yamaha SVC, he said something about cam timings but did not check anything , just listened to the noise when idling and reving the bike.
I am a noob when it comes to engine parts ,please let me know if something seriously going wrong with my engine.


was replaced? As far as I remember there are no pushrods in this engine as the cam is overhead. 

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