Cylinder head -GRAN TURISMO GT186 Porcupine- Lambretta LI 125-150, LIS 125-150, SX 150, DL 125-150, GP 125-150.
For the GT 186 cylinder with 64 mm bore or suitable for cylinders with 64 mm bore and a piston crown like the piston used on the Yamaha YPVS 350. AI-translation