GUIDE BLOCK for VARIATOR PULLEY applies to: Code Description 51 6872 MOUV.HALF-PULLE. KIT VARIOTOP 51 7713 MOV.HALF-PULLEY KIT for VARIOTOP MBK51V 51 6840 VARIOTOP for ENGINE MBK GR2-GR3. IT DISCON. ORIGIN CLUTCH. 51 6498 VARIOTOP MALOSSI MBK-MG. IT DISCON. ORIGIN CLUTCH. 51 6839 VARIOTOP MBK autom. Motorcycles 51 6921 VARIOTOP MBK autom. Motorcycles 51 7723 VARIOTOP MBK autom. Motorcycles 51 1885 VARIOTOP PEUGEOT autom. Motorcycles 51 1886 VARIOTOP PEUGEOT autom. Motorcycles 51 2639 VARIOTOP reversed eng.MG-MBK. IT DISCON. ORIGIN CLUTCH. 51 1887 VARIOTOP variator PEUGEOT 103 RCX - SPX