Used to Bore up the 2-stroke BIRDIE
I used the Piston for RepairKit on a 2-stroke BIRDIE with the same part number as the Scooter system and OEM Piston.
Cylinder needs to be processed separately, but Torque is increased by Bore up and it became easy to ride.
The work process at the time of installation is now open to the public on YouTube, please see if you like.
