Weird sounds coming from my cb550's engine

Hondacb550man

New Member
Just back my bike back from a mechanic who opened the motor and replaced a headgasket. Rode it home, totally cool 90mph+ np.

I was on a casual ride and I took it on a calm dirt rode. The fastest I went was prlly 30mph. About 15-20 minutes in, I hear this weird sound coming from my engine. It sounds like tiny rocks slamming around in the engine. It sounds equal on both sides of the engine, and mostly near when the exhausts meet the motor.

The bike runs fine, its just annoying, and I'm worried it could clog the engine eventually. My mechanic warned me not to take my engine apart again because the screws will strip.

What should be the plan of attack? I can upload a video of the sound if that helps.
 
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