Hey, If i Install a Athena 70cc big bore kit how much jet increase? If i installed TNT 21mm carb jet increase? Gianelli exhuast jet increase? If all these was on my piaggio zip 50cc AC using standard airbox what is recommended jet?
No one can really give you that information. If you use the search or just look there are topics that show general ideas of what percentage to increase your jetting but these are just a rough guide. Too many things come into play when jetting a bike. Our carb guide explains as well.
