., seems i have missed a bit here, ..so this is the problem , my brother is complaining of some sort of oil residue forming even after repeated cleaning arount the crank head cover over the heat fins, Y would this be ?? engine oil was replaced recently only by him.. even i noticed it once while i was riding my bike but cleaned it thinking it was just something that got stuck while regular driving .
SO again the oil around the fins at the engine crank case head ..?? y could that be ?


check attached pics showing Twister's air chamber.
sound from area around spark plug , is this the problem with the spark plug or carb. setting ?? this problem continues till 2 to 3 kms till engine is not warmed up ..!!

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