Strange noise under acceleration

[Gloomshadow]

My bike didnt come with an exhaust system so I rotated the motor and put a stock Y-pipe and a jardine carbon and a chin on it. From that day on, when the bike is hot and Im pulling away hard from a light I hear the wierdest noise. It sounds like "BOIINNG!" Like a spring is being streached, a big spring! Its the wierdest thing. At first I thought that maybe something wasnt tourqued to spec but when looking at my exhaust cannister I noticed one of the little retainer springs that connects to the y-pipe is contacting the y-pipe itself. Think that could be the noise Im hearing. Thats a LITTLE spring, I cant imagine it making a noticable noise..

 

[Gloomshadow]

ideas anyone?

 

[Stevenc150]

Are your brakes sticking? Ride normal till hot, pull up to the light, quickly shut the motor off and try to push from a stop. Also might be your rear shock, give it a good once-over.

 

[Gloomshadow]

its not suspension, feels like either isolinear motormounts or exhaust