zx with biggest stroke and bore without modding cases, carb , pipe , dynotuned with 98ron fuel and motul m800 premix, polini variator, light weight clutch , red spring in final drive , gets 100-110kmh with a 113kg rider .... reckon it would get another 10 with someone say 65kgs gets aweful warm at those speeds though , be nice to do a watercooled mod ...