Hi Steve , that is very useful information for you brainy blokes wot can race a kart with an extra pedal and a lever and stoppy things on the front but I,ve not seen a class one with a seventeen tooth front sprocket
I think on reflection I will bow to the superior knowledge and sagacity of my esteemed competitor Pete Freeman and copy him ,seems to work well he is second in the championship after all dammit !!!
Reg