Chirping sounds

[Mr.Herron]

Hello everyone I had originally got my motor rebuilt The avengers 85 and I noticed when decelerating past 25 miles an hour it makes a weird chirping noise and only when accelerating it does not make that sound when im revving it up. Is anybody know what these could be?

 

[Sidewinder Jerry]

You got a cricket trapped inside of your engine lol

 

[Venice Motor Bikes]

A chirping noise usually means a head gasket leak.
Try sanding the deck & head surfaces on a piece of glass with sandpaper, & install a new head gasket to the proper torque... 12 ft/lbs.

 

[Wevil Kenevil]

The chirp is from the cylinder pressure escaping and playing the gasket like a reed in a clarinet... Like Norm said!