This is a Wiseco piston from a 1999 Suzuki RM125. It had probably 20 hours on it since being installed last fall. I followed the same heat/cool cycle for break in as I always do.
The bike was running great then suddenly I heard a pop followed by a small clicking noise from the engine. My first thought was that it broke a ring. The clicking noise stopped after a few seconds. I idled it back to the truck (from an MX track) and once I pulled the pipe I could see the chip on the piston while looking into the exhaust port. The cylinder is fine so I guess that chip made it's way out the exhaust before causing any trouble.
I have some images of the piston here:
http://www.rotinc.com/piston_pics/
Any ideas what would cause such a thing to happen?
The bike was running great then suddenly I heard a pop followed by a small clicking noise from the engine. My first thought was that it broke a ring. The clicking noise stopped after a few seconds. I idled it back to the truck (from an MX track) and once I pulled the pipe I could see the chip on the piston while looking into the exhaust port. The cylinder is fine so I guess that chip made it's way out the exhaust before causing any trouble.
I have some images of the piston here:
http://www.rotinc.com/piston_pics/
Any ideas what would cause such a thing to happen?