For Vespa 98/125 V1-33/VM/VN/VNA/VNB1-4T/150 VL/VB/VBA/VBB 1-2T 2°/VL1/VGLA-B/GL 1°/VGL1/GS. Nut Flywheel M11x1,5 mm, SIP. We also have made certain of the availability of nut sizes that were no longer in production, such as the type compatible with the Vespa V50 1° series.