
Featuring Engine Model	50cc AIR	50cc Water	125cc GY6	125cc GY7	150cc GY6	150cc GY7
Model No.	BN139QMB	BN1PE40MB	BN152QMI	BN152QMI-A	BN157QMJ	BN157QMJ-A
Name	4 STROKE 50	4 STROKE 50	GY6 125	GY7 125	GY6 150	GY7 150
Style	SINGLE CYLINDER, 4 STROKE	SINGLE CYLINDER, 2 STROKE	SINGLE CYLINDER, 4 STROKE	SINGLE CYLINDER, 4 STROKE	SINGLE CYLINDER, 4 STROKE	SINGLE CYLINDER, 4 STROKE
Cooling	AIR	WATER	AIR	AIR	AIR	AIR
Valve Qty	2		2	2	2	2
Displacement(cc)	49.6	49.26	124.6	124.6	149.6	149.6
Compression Ratio	10.4:1	10:01	9.2:1	10:01	9.5:1	10:01
Bore Stroke(mm)	39*41.5	40*39.2	52.4*57.8	52.4*57.8	57.4*57.8	57.4*57.8
Max Power	2.4kw/8000r/min	3.6kw/7500r/min	5.4kw/7500r/min	6.3kw/7500r/min	6.3kw/7500r/min	7.0kw/7500r/min
Max Torque	2.8N.m/6500r/min	4.8N.m/7000r/min	8.2N.m/6000r/min	8.8N.m/6000r/min	8.8N.m/6000r/min	9.5N.m/6000r/min
Size(mm)	620380290	650395230	630400320	630400320	680400320	680400320

F10

F11