YS 120SR base technique turning
Turning details
Crankshaft: changes the shape of the passenger port and the counter.
Cylinder liner: changes the shape of port and the exhaust timing.
Piston: reduces weight.
Connecting Rod: burnished and polished.
* While maintaining the strong torque, M.Speed turning improves the original engine by accelerating the rotation speed and sharpening the response.
![](//www.rcjapan.net/images/MSYS120SR/IMG_9591.JPG)
![](//www.rcjapan.net/images/MSYS120SR/IMG_9592.JPG)
![](//www.rcjapan.net/images/MSYS120SR/IMG_9596.JPG)