[Joyseph]

Hi, I have 1750km on my bike, I have transported it recently on the truck and now I have noticed it has lost that nice sound it had, I hear the engine when revving it, but no more sound from exhaust like before. Could it be that by transportation and shaking or so, valve cutaway got stuck or something, or why did it loose sound?
Have anyone this issue?

 

[JeffroGymnast]

I would check the exhaust flap. When you first turn on the bike it should move open and then close again. If it's stuck closed it would certainly sound quieter.