Right, think I've worked this out, please correct me if I'm wrong (more than likely!) 5 Speed is as follows: 1st - 38 teeth on driven gear, 11 on drive gear, ratio 3.45 2nd - 44 teeth on driven gear, 21 on drive gear, ratio 2.09 3rd - 43 teeth on driven gear, 30 on drive gear, ratio 1.43 4th - 41 teeth on driven gear, 38 on drive gear, ratio 1.07 5th - 41 teeth on driven gear, 46 on drive gear, ratio 0.89 Final drive is 65/18, ratio 3.61   6 Speed is