1 – This piston exhibits perfect carbon buildup, indicating that the pre-mix ratio is correct, the carburetor is tuned correctly, and the transfer ports are flowing freely.
Home 1994 – 2001 Yamaha YZ125 Piston – Inspection 1 - This piston exhibits perfect carbon buildup, indicating that the pre-mix ratio is correct, the carburetor is tuned correctly, and the transfer ports are flowing freely.


