i had an engine compliant last week. i gave my bike to bajaj service center and it costed me around 12000(see the Bill Attached). Now it is having a weird noise coming between 40kmph to 60kmph. The sound is similar to the the sound occuring when one way clutch goes wrong. Engine is heating up too much. How can i make sure the cooling system is working fine. Is this sound dangerous ? The problem is sound is not coming everytime...it comes at some occasions only...What may be the possible reason for this sound? will it be because of problem with replaced parts ?