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When I start accelerating, after around 3 seconds I get a spike in my engine rpm (at least it sounds like it). After another few seconds it calms back down and continues escelating as expected.

I don't have much mechanics knowledge but i'd assume it's a roller or belt problem; If it is, which would be the suggested maintenance fix?

My scooter is a 150cc, around 3 months old and has just over 2000 KM on it.

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