Hi, just in the process of rebuilding my reed valved Avanti which has been running with 20 x 47 sprockets and Li125 Special gears (4.7) It did run really well and felt like it would pull higher. The rebuild includes a Grand Tourisimo 60/110 crank which I believe will add a little to the torque so was thinking of gearing for around 4.4:1 ratio. I will be buying an AF Road clutch and also have an Li150 (Italian) gearbox I could use.
Just wondering what others thoughts on gearing choices are before ordering. I note the AF clutches come in 46, 47 and 48 tooth so numerous ways of getting the top ration but what about the gaps between the gears?
Any thoughts gratefully received