Piaggio Typhoon - ScooterSwapShop Looking for some more speed out of your Aprilia sr50 Piaggio? Or your piaggio typhoon? Also works for GP1 and any other Piaggio "long case" engine. Will not fit ZIP.. View full product details Add a cable of your own, or from this site, to install choke on your dellorto! Dell'Orto Manual Choke Kit Piaggio auto choke - On Two Wheels Forum Nov 11, 2005Hi, the choke should be up (shorter) when cold. Remove the choke unit from the carb & measure how long the needle is sticking out. Then connect it to the battery for about 5 minutes & remeasure, it should be longer. If it's not then time for a new one. By default the choke is "On" when cold and switches "Off" with power going to it.