Final drive ratios

Rear Sprocket	Front 12	Front 13	Front 14	Front 15	Front 16	Front 17	Front 18
28	2.33	2.15	2.00	1.86	1.75	1.65	1.55
29	2.42	2.23	2.07	1.93	1.81	1.71	1.61
30	2.50	2.31	2.14	2.00	1.87	1.76	1.66
31	2.58	2.38	2.21	2.06	1.93	1.82	1.72
32	2.66	2.46	2.28	2.13	2.00	1.88	1.77
33	2.75	2.54	2.35	2.20	2.06	1.94	1.83
34	2.83	2.61	2.43	2.26	2.12	2.00	1.88
35	2.92	2.69	2.50	2.33	2.19	2.06	1.94
36	3.00	2.77	2.57	2.40	2.25	2.12	2.00
37	3.08	2.85	2.64	2.46	2.31	2.18	2.05
38	3.16	2.92	2.71	2.53	2.37	2.23	2.11
39	3.25	3.00	2.78	2.60	2.44	2.29	2.16
40	3.33	3.08	2.86	2.66	2.50	2.35	2.22
41	3.42	3.15	2.93	2.73	2.56	2.41	2.27
42	3.50	3.23	3.00	2.80	2.62	2.47	2.33
43	3.58	3.30	3.07	2.86	2.69	2.53	2.39

This table provides the final drive ratios for various combinations of rear and front sprockets, which can help determine the optimal gearing setup for your pit bike.