I have just recently brought a hyosung 250 and have only done 850km's. Around the 500k mark i started to hear this strange noise sounding like metal rubbing. I thought it may be the front brakes just rubbing a little but after i had a listen for the sound it seems to be coming from near the front of the engine. While the bike is in idle there is no noise but when i start to accelarate, stay at speed or do anything with the throttle the noise is always there. I think it may be coming from around the radiator or some where close as that is where the sound seems to originate. Has anyone else has similiar problem or know what the cause may be?