i see, i didn't know Malossi had different primary gears for mina short carter.
ok so here's what i got with a Metrakit primary gear & a taiwan made gear kit;
Metrakit 14/46 with Taiwan 15/31 = 6.79
Metrakit 14/46 with Taiwan 16/31 = 6.36
so the Sonic gearing you mentioned fall between the 2 combinations i posted above, we will what happens first with a taller tire, when we exhaust all means we will then get a taller gear kit.
thanks for the info mijn vriends, dank u.