MC21 Sprocket Gear Ratio Chart

Speed in Km/h at 10,000 RPM with a 150/60 - 17 rear tire

MC21 Stock sprocket sizes
Front : 15T
Rear : 40T

Front Sprocket size	16	15	14	16	15	14	16	15	14	16	15	16	14	15	16	14	15	14	15	14	15	14	14	14
Rear Sprocket size	37	35	33	38	36	34	39	37	35	40	38	41	36	39	42	37	40	38	41	39	42	40	41	42
1st	72	72	71	70	70	69	69	68	67	67	66	65	65	65	64	63	62	62	61	60	60	58	57	55
2nd	103	102	101	100	99	98	98	97	95	95	94	93	93	92	91	90	89	88	87	86	85	83	81	79
3rd	131	130	128	127	126	125	124	123	121	121	119	118	118	116	115	114	113	111	111	109	108	106	103	101
4th	155	154	152	151	149	148	147	145	143	143	141	140	139	138	136	136	134	132	131	129	128	125	122	119
5th	174	172	170	169	167	165	165	163	161	161	158	157	156	154	153	152	151	148	147	144	143	140	137	134
6th	191	189	187	186	184	182	181	179	176	176	174	172	172	171	168	167	165	163	161	158	158	154	151	147