Dell-Orto Main jets
21mm Malossi RS50 carburetor takes the 5mm thread size
'96-'09 RS125 uses 6mm version
Most, if not all, scooter carb setups run the 6mm thread size.
5mm sizes generally* available are: 56-112
6mm sizes generally* available are: 63-110; 150-215
Sold EACH
Main jets are not returnable, so be sure you know your thread size before ordering.
*Please note: as of 2020, these jets are closeout, some sizes may no longer be available.