2 Stroke LD100 motor ONLY with stamp YD100 on rod;. UPGRADED YD100 motor;. 2 stroke motor LD100 Bore and Stroke 50mm x 40mm Allen bolts on intake side. Bore and Stroke: 50mm x 40mm;. During run-in period, it is prohibited to accelerate throttle handle too fast, you can grip the handle slowly (step by step), or the motor will be locked up.
